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2025

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Articles 391 - 420 of 493

Full-Text Articles in Neurosciences

High Cellular Plasticity State Of Medulloblastoma Local Recurrence And Distant Dissemination, Hailong Liu, Jing Zhang, Ziwei Wang, Wei Wang, Dongming Han, Xuan Chen, Yu Su, Jiao Zhang, Craig Daniels, Olivier Saulnier, Zeyuan John Wang, Chunyu Gu, Fei Liu, Kaiwen Deng, Dongyang Wang, Zhaoyang Feng, Yahui Zhao, Yifei Jiang, Yu Gao, Zijia Liu, Mingxu Ma, Yanong Li, Zitong Zhao, Hongyu Yuan, Youliang Sun, Yanfeng Shi, Tao Yang, Wenxing Li, Xueling Qi, Zejun Duan, Junping Zhang, Mingshan Zhang, Chunjiang Yu, Wei Jin, Xinguang Yu, Yu Tian, Shuaicheng Li, Chunde Li, Michael D Taylor, Jiankang Li, Yong-Qiang Liu, Xiaoguang Qiu, Tao Jiang Jan 2025

High Cellular Plasticity State Of Medulloblastoma Local Recurrence And Distant Dissemination, Hailong Liu, Jing Zhang, Ziwei Wang, Wei Wang, Dongming Han, Xuan Chen, Yu Su, Jiao Zhang, Craig Daniels, Olivier Saulnier, Zeyuan John Wang, Chunyu Gu, Fei Liu, Kaiwen Deng, Dongyang Wang, Zhaoyang Feng, Yahui Zhao, Yifei Jiang, Yu Gao, Zijia Liu, Mingxu Ma, Yanong Li, Zitong Zhao, Hongyu Yuan, Youliang Sun, Yanfeng Shi, Tao Yang, Wenxing Li, Xueling Qi, Zejun Duan, Junping Zhang, Mingshan Zhang, Chunjiang Yu, Wei Jin, Xinguang Yu, Yu Tian, Shuaicheng Li, Chunde Li, Michael D Taylor, Jiankang Li, Yong-Qiang Liu, Xiaoguang Qiu, Tao Jiang

Faculty, Staff and Students Publications

Medulloblastoma (MB), a heterogeneous pediatric brain tumor, poses challenges in the treatment of tumor recurrence and dissemination. To characterize cellular diversity and genetic features, we comprehensively analyzed single-cell/nucleus RNA sequencing (sc/snRNA-seq), single-nucleus assay for transposase-accessible chromatin sequencing (snATAC-seq), and spatial transcriptomics profiles and identified distinct cellular populations in SHH (sonic hedgehog) and Group_3 subgroups, with varying proportions in local recurrence or dissemination. Local recurrence showed higher cycling tumor cell enrichment, whereas disseminated lesions had a relatively notable presence of differentiated subsets. Chromosomal alteration evaluation revealed distinct genetic subclones during MB progression, such as chr7q gain and chr11 loss in Group_3 …


Evaluating Sympton Clusters In First-Time Ischemic Stroke Survivors Who Discharge From The Hospital To Home, Paula De La Pena Jan 2025

Evaluating Sympton Clusters In First-Time Ischemic Stroke Survivors Who Discharge From The Hospital To Home, Paula De La Pena

Dissertations

The purpose of this study was to examine symptoms and relationships between those symptoms in first-time ischemic stroke survivors who discharge home after their initial stroke. Current measurement of recovery after stroke places emphasis on the physical aspects of recovery when current literature suggests that other, more subtle symptoms may be equally contributory to recovery. This descriptive, exploratory research study was conducted via a secondary analysis of both structured and unstructured data in a study cohort of 115 first-time ischemic stroke survivors from a tertiary academic medical center in the Midwest. Unstructured clinical notes were analyzed for the presence of …


A Potential Vegf-Driven Hypothesis Of Calvarial Centripetal Proliferation In Cerebral Proliferative Angiopathy, Shigeta Miyake, Timo Krings, Tze Phei Kee, Thierry A G M Huisman Jan 2025

A Potential Vegf-Driven Hypothesis Of Calvarial Centripetal Proliferation In Cerebral Proliferative Angiopathy, Shigeta Miyake, Timo Krings, Tze Phei Kee, Thierry A G M Huisman

Faculty, Staff and Students Publications

Cerebral proliferative angiopathy (CPA) is a rare subtype of cerebral arteriovenous malformation, characterized by unique angiographic features and clinical presentations. Although the clinical and angiographic characteristics of CPA have been well described, their impact on the surrounding tissues remains underexplored. Herein, we investigated the presence of calvarial thickening in patients with CPA, and discuss its potential pathogenesis. This retrospective multicenter cohort study enrolled 16 CPA patients from our institutions. Patients were identified by a search of the hospital medical records for key words related to "cerebral proliferative angiopathy." Data on demographics, CPA characteristics, clinical symptoms, and calvarial thickening were collected …


Does Body Mass Index Influence Intraoperative Costs And Operative Times For Open Transforaminal Lumbar Interbody Fusion? A Time-Driven Activity-Based Costing Analysis, Danyal A. Quraishi, Advith Sarikonda, Dwight M. Self, Emily Isch, Steven R. Glener, Arbaz A. Momin, Ashmal Sami, Nicholas Clark, Joshua Pelta-Heller, Srinivas Prasad, Ashwini Sharan, Jack Jallo, James Harrop, Alex R. Vaccaro, Ahilan Sivaganesan Jan 2025

Does Body Mass Index Influence Intraoperative Costs And Operative Times For Open Transforaminal Lumbar Interbody Fusion? A Time-Driven Activity-Based Costing Analysis, Danyal A. Quraishi, Advith Sarikonda, Dwight M. Self, Emily Isch, Steven R. Glener, Arbaz A. Momin, Ashmal Sami, Nicholas Clark, Joshua Pelta-Heller, Srinivas Prasad, Ashwini Sharan, Jack Jallo, James Harrop, Alex R. Vaccaro, Ahilan Sivaganesan

Department of Neuroscience Faculty Papers

BACKGROUND: The increasing prevalence of obesity has raised concerns about its impact on surgical outcomes and healthcare costs. This study evaluates the influence of Body Mass Index (BMI) on intraoperative costs and operative times during open Transforaminal Lumbar Interbody Fusion (TLIF) procedures using a Time-Driven Activity-Based Costing (TDABC) approach.

METHODS: A retrospective analysis was conducted on 279 patients who underwent TLIF between 2019 and 2022. Patients were categorized into 5 BMI cohorts: healthy weight (BMI 18.5-24.99), overweight (BMI 25.0-29.99), Class I obese (BMI 30.0-34.99), Class II obese (BMI 35.0-39.99), and Class III obese (BMI >40). Intraoperative costs were calculated using …


Supplementary Motor Area In Speech Initiation: A Large-Scale Intracranial Eeg Evaluation Of Stereotyped Word Articulation, Latané Bullock, Kiefer J Forseth, Oscar Woolnough, Patrick S Rollo, Nitin Tandon Jan 2025

Supplementary Motor Area In Speech Initiation: A Large-Scale Intracranial Eeg Evaluation Of Stereotyped Word Articulation, Latané Bullock, Kiefer J Forseth, Oscar Woolnough, Patrick S Rollo, Nitin Tandon

Faculty, Staff and Student Publications

Speech production engages a distributed network of cortical and subcortical brain regions. The supplementary motor area (SMA) has long been thought to be a key hub in coordinating across these regions to initiate voluntary movements, including speech. We analyzed direct intracranial recordings from 115 patients with epilepsy as they articulated a single word in a subset of trials from a picture-naming task. We aimed to characterize the temporal dynamics of SMA relative to other cortical regions. SMA and preSMA were among the first regions to activate after cue onset, peaked in activity before articulation onset, and were the earliest regions …


Investigating The Role Of Endothelin-1 In Reactive Astrocytosis, Candace Betancourt-Szymanowska Jan 2025

Investigating The Role Of Endothelin-1 In Reactive Astrocytosis, Candace Betancourt-Szymanowska

Master's Theses

Glaucoma is a progressive optic neuropathy which results in blindness for many patients, even with treatment. Endothelin-1 (ET-1) is a vasoactive peptide known to be aberrantly upregulated in the eyes of individuals with glaucoma. Optic nerve head astrocytes (ONHA) are the resident glial cell of the optic nerve head and are among the first cell types to undergo changes to a reactive phenotype. In this thesis, we investigated the role of ET-1 overexpression and its putative role in eliciting a reactive phenotype in ONHA by inducing lentiviral-mediated over-expression of EDN1. ONHA transduced with EDN1 (ONHA ET-1) were verified to be …


Sex Differences In Response To Diet Enriched With Glutathione Precursors In The Aging Heart, Aude Angelini, Grecia Garcia Marquez, Anna Malovannaya, Marta L Fiorotto, Alexander Saltzman, Antrix Jain, Joann Trial, George E Taffet, Katarzyna A Cieslik Jan 2025

Sex Differences In Response To Diet Enriched With Glutathione Precursors In The Aging Heart, Aude Angelini, Grecia Garcia Marquez, Anna Malovannaya, Marta L Fiorotto, Alexander Saltzman, Antrix Jain, Joann Trial, George E Taffet, Katarzyna A Cieslik

Faculty, Staff and Students Publications

Common features of the aging heart are dysregulated metabolism, inflammation, and fibrosis. Elevated oxidative stress is another hallmark of cardiac aging that can exacerbate each of these conditions. We hypothesize that by increasing natural antioxidant levels (glutathione), we will improve cardiac function. Twenty-one-month-old mice were fed glycine and N-acetyl cysteine (GlyNAC; glutathione precursors)-supplemented or control diets for 12 weeks. Heart function was monitored longitudinally, and the exercise performance was determined at the end of the study. We found that the GlyNAC diet was beneficial for old male but not old female mice, leading to an increase of Ndufb8 expression (a …


Foxr2 Targets Lhx6+/Dlx+ Neural Lineages To Drive Central Nervous System Neuroblastoma, Selin Jessa, Antonella De Cola, Bhavyaa Chandarana, Michael Mcnicholas, Steven Hébert, Adam Ptack, Damien Faury, Jessica W Tsai, Andrey Korshunov, Timothy N Phoenix, Benjamin Ellezam, David T W Jones, Michael D Taylor, Pratiti Bandopadhayay, Manav Pathania, Nada Jabado, Claudia L Kleinman Jan 2025

Foxr2 Targets Lhx6+/Dlx+ Neural Lineages To Drive Central Nervous System Neuroblastoma, Selin Jessa, Antonella De Cola, Bhavyaa Chandarana, Michael Mcnicholas, Steven Hébert, Adam Ptack, Damien Faury, Jessica W Tsai, Andrey Korshunov, Timothy N Phoenix, Benjamin Ellezam, David T W Jones, Michael D Taylor, Pratiti Bandopadhayay, Manav Pathania, Nada Jabado, Claudia L Kleinman

Faculty, Staff and Students Publications

Central nervous system neuroblastoma with forkhead box R2 (FOXR2) activation (NB-FOXR2) is a high-grade tumor of the brain hemispheres and a newly identified molecular entity. Tumors express dual neuronal and glial markers, leading to frequent misdiagnoses, and limited information exists on the role of FOXR2 in their genesis. To identify their cellular origins, we profiled the transcriptomes of NB-FOXR2 tumors at the bulk and single-cell levels and integrated these profiles with large single-cell references of the normal brain. NB-FOXR2 tumors mapped to LHX6+/DLX+ lineages derived from the medial ganglionic eminence, a progenitor domain in the ventral telencephalon. In vivo prenatal …


Dose–Response Of Tdcs Effects On Motor Learning And Cortical Excitability: A Preregistered Study, Gavin Hsu, Zhenous Hadi Jafari, Abdelrahman Ahmed, Dylan J. Edwards, Leonardo G. Cohen, Lucas C. Parra Jan 2025

Dose–Response Of Tdcs Effects On Motor Learning And Cortical Excitability: A Preregistered Study, Gavin Hsu, Zhenous Hadi Jafari, Abdelrahman Ahmed, Dylan J. Edwards, Leonardo G. Cohen, Lucas C. Parra

Research outputs 2022 to 2026

Multiple studies have demonstrated that transcranial direct current stimulation (tDCS) of the primary motor cortex (M1) can influence corticospinal excitability and motor skill acquisition. However, the evidence for these effects is inconsistent, and a common neural substrate for these effects has not been directly demonstrated. To address this, we hypothesized that higher tDCS intensities would produce more robust effects, and uncover their relationship. In this preregistered study, 120 participants engaged in a motor skill learning task while receiving tDCS with posterior-to-anterior currents through M1. We employed a double-blind, between-subjects design, with groups of 4 mA, 6 mA, or sham stimulation, …


Is Modulation Of Immune Checkpoints On Glioblastoma-Infiltrating Myeloid Cells A Viable Therapeutic Strategy?, Ruochen Du, Jianzhong Zhang, Rimas V Lukas, Shashwat Tripathi, Jared T Ahrendsen, Michael A Curran, Crismita Dmello, Peng Zhang, Roger Stupp, Ganesh Rao, Amy B Heimberger Jan 2025

Is Modulation Of Immune Checkpoints On Glioblastoma-Infiltrating Myeloid Cells A Viable Therapeutic Strategy?, Ruochen Du, Jianzhong Zhang, Rimas V Lukas, Shashwat Tripathi, Jared T Ahrendsen, Michael A Curran, Crismita Dmello, Peng Zhang, Roger Stupp, Ganesh Rao, Amy B Heimberger

Faculty, Staff and Students Publications

The field of immunology has traditionally focused on immune checkpoint modulation of adaptive immune cells. However, many malignancies such as glioblastoma are mostly devoid of T cells and rather are enriched with immunosuppressive myeloid cells of the innate immune system. While some immune checkpoint targets are shared between adaptive and innate immunity, myeloid-specific checkpoints could also serve as potential therapeutics. To better understand the impact of immune checkpoint blockade on myeloid cells, we systematically summarize the current literature focusing on the direct immunological effects of PD-L1/PD-1, CD24/Siglec-10, collagen/LAIR-1, CX3CL1/CX3CR1, and CXCL10/CXCR3. By synthesizing the molecular mechanisms and the translational implications, …


Alzheimer’S Disease: Relationship Of Cognition And Behavior To Neurochemistry, Peter J. Whitehouse Jan 2025

Alzheimer’S Disease: Relationship Of Cognition And Behavior To Neurochemistry, Peter J. Whitehouse

Faculty Scholarship

Alzheimer’s disease is characterized by loss of cells and synapses in specific neural systems. The development of more effective therapies will depend on understanding the relationships between this pathology and the cognitive and behavioral impairments. In this review, focusing primarily on work in our laboratory, we will examine both classic and neuropeptide neurotransmitter systems and will discuss conceptual and methodological problems in relating clinical and biological measures.


Building Toward Population Reserve And A Critical Positive Psychiatry, Peter J. Whitehouse Jan 2025

Building Toward Population Reserve And A Critical Positive Psychiatry, Peter J. Whitehouse

Faculty Scholarship

No abstract provided.


Molecular Logic For Cellular Specializations That Initiate The Auditory Parallel Processing Pathways, Junzhan Jing, Ming Hu, Tenzin Ngodup, Qianqian Ma, Shu-Ning Natalie Lau, M Cecilia Ljungberg, Matthew J Mcginley, Laurence O Trussell, Xiaolong Jiang Jan 2025

Molecular Logic For Cellular Specializations That Initiate The Auditory Parallel Processing Pathways, Junzhan Jing, Ming Hu, Tenzin Ngodup, Qianqian Ma, Shu-Ning Natalie Lau, M Cecilia Ljungberg, Matthew J Mcginley, Laurence O Trussell, Xiaolong Jiang

Faculty, Staff and Students Publications

The cochlear nuclear complex (CN), the starting point for all central auditory processing, encompasses a suite of neuronal cell types highly specialized for neural coding of acoustic signals. However, the molecular logic governing these specializations remains unknown. By combining single-nucleus RNA sequencing and Patch-seq analysis, we reveal a set of transcriptionally distinct cell populations encompassing all previously observed types and discover multiple hitherto unknown subtypes with anatomical and physiological identity. The resulting comprehensive cell-type taxonomy reconciles anatomical position, morphological, physiological, and molecular criteria, enabling the determination of the molecular basis of the specialized cellular phenotypes in the CN. In particular, …


Two-Year Follow-Up Of Gait And Postural Control Following Initiation Of Recombinant Human Tripeptidyl Intracerebroventricular Enzyme Replacement Therapy In Two Atypical Cln2 Patients, Rahul Soangra, Marybeth Grant-Beuttler, Harriet Chang, Raymond Y. Wang Jan 2025

Two-Year Follow-Up Of Gait And Postural Control Following Initiation Of Recombinant Human Tripeptidyl Intracerebroventricular Enzyme Replacement Therapy In Two Atypical Cln2 Patients, Rahul Soangra, Marybeth Grant-Beuttler, Harriet Chang, Raymond Y. Wang

Physical Therapy Faculty Articles and Research

Neuronal ceroid lipofuscinosis type 2 (CLN2) is a rapidly progressive neurodegenerative disorder leading to premature mortality. Ambulatory CLN2 patients typically receive standard of care treatment through biweekly intracerebroventricular (ICV) enzyme replacement therapy (ERT) involving recombinant human tripeptidyl peptidase 1, known as cerliponase alfa (Brineura®, Biomarin Pharmaceuticals). This study longitudinally assessed the impact of ICV cerliponase alfa ERT on gait, and postural control across a two-year span in two siblings diagnosed with atypical CLN2 disease. Both participants, ID01 (18 years and 8 months old at enrollment) and ID02 (13 years and 3 months old at enrollment), exhibited symptomatic characteristics …


Insights Into Rett Syndrome: Social Behavior, Bdnf-Trkb Signaling, And Dendritic Spines, Destynie Medeiros Jan 2025

Insights Into Rett Syndrome: Social Behavior, Bdnf-Trkb Signaling, And Dendritic Spines, Destynie Medeiros

All ETDs from UAB

Rett syndrome (RTT) is a neurodevelopmental disorder primarily affecting females, caused by pathogenic variants in the X-linked MECP2 gene, which encodes the transcriptional modulator Methyl-CpG binding protein 2 (MeCP2). RTT is characterized by motor deficits, loss of speech, autistic features, and intellectual disability. A key gene regulated by MeCP2 is BDNF, encoding the neurotrophin brain-derived neurotrophic factor (BDNF). BDNF levels are lower in multiple brain regions of Mecp2-deficient mice, and experimentally increasing BDNF levels improves several RTT phenotypes in mouse models. Due to BDNF's low blood-brain barrier permeability, we tested LM22A-4, a brain-penetrant small molecule ligand of TrkB receptors, on …


Neural Mechanisms Of Proactive And Reactive Cognitive Control In Humans, Anas Khan Jan 2025

Neural Mechanisms Of Proactive And Reactive Cognitive Control In Humans, Anas Khan

All ETDs from UAB

Cognitive control enables flexible, goal-directed behavior by dynamically adjusting our actions in response to changing task demands. This dissertation investigates the neural mechanisms underlying proactive and reactive cognitive control, particularly focusing on the dorsolateral prefrontal cortex (dlPFC) and the dorsal anterior cingulate cortex (dACC) during tasks that require response inhibition and conflict processing. Using intracranial electroencephalography (iEEG) recordings from human participants, this research examines the distinct roles of oscillatory activity in these regions in both short-term reactive adjustments and long-term proactive control strategies. Chapter 2 explores the role of low-frequency oscillations in the mid-rostral dlPFC during motor inhibition, revealing that …


The Dopaminergic Cell-Intrinsic Clock And Bidirectional Relationships Of Circadian Disruption And Synucleinopathy, Ananya Swaroop Jan 2025

The Dopaminergic Cell-Intrinsic Clock And Bidirectional Relationships Of Circadian Disruption And Synucleinopathy, Ananya Swaroop

All ETDs from UAB

Circadian rhythms are crucial endogenous cycles with period of ~24 hours that evolved to adapt to light – dark driven changes in environmental conditions. At a molecular level, circadian rhythms are generated by the actions of clock genes that form a transcriptional- translational feedback loop and regulate the rhythmic expression of downstream clock-controlled genes. Cumulatively, the actions of these molecular clocks regulate rhythmicity of physiological and behavioral processes and are extensively characterized within the central circadian pacemaker, the suprachiasmatic nucleus (SCN). Like SCN neurons, dopaminergic neurons of the SN are intrinsically pacemaking, though it is unknown if this intrinsic firing …


Modulation Of Stemness And Differentiation Regulators By Valproic Acid In Medulloblastoma Neurospheres, Natália Hogetop Freire, Alice Laschuk Herlinger, Julia Vanini, Matheus Dalmolin, Marcelo A C Fernandes, Carolina Nör, Vijay Ramaswamy, Caroline Brunetto De Farias, André Tesainer Brunetto, Algemir Lunardi Brunetto, Lauro José Gregianin, Mariane Da Cunha Jaeger, Michael D Taylor, Rafael Roesler Jan 2025

Modulation Of Stemness And Differentiation Regulators By Valproic Acid In Medulloblastoma Neurospheres, Natália Hogetop Freire, Alice Laschuk Herlinger, Julia Vanini, Matheus Dalmolin, Marcelo A C Fernandes, Carolina Nör, Vijay Ramaswamy, Caroline Brunetto De Farias, André Tesainer Brunetto, Algemir Lunardi Brunetto, Lauro José Gregianin, Mariane Da Cunha Jaeger, Michael D Taylor, Rafael Roesler

Faculty, Staff and Students Publications

Changes in epigenetic processes such as histone acetylation are proposed as key events influencing cancer cell function and the initiation and progression of pediatric brain tumors. Valproic acid (VPA) is an antiepileptic drug that acts partially by inhibiting histone deacetylases (HDACs) and could be repurposed as an epigenetic anticancer therapy. Here, we show that VPA reduced medulloblastoma (MB) cell viability and led to cell cycle arrest. These effects were accompanied by enhanced H3K9 histone acetylation (H3K9ac) and decreased expression of the MYC oncogene. VPA impaired the expansion of MB neurospheres enriched in stemness markers and reduced MYC while increasing TP53 …


Social Dominance And Cortical Neuronal Synchrony In Male Mecp2 Knockout Mice, Cesar Andres Acevedo Triana Jan 2025

Social Dominance And Cortical Neuronal Synchrony In Male Mecp2 Knockout Mice, Cesar Andres Acevedo Triana

All ETDs from UAB

Social behaviors are critical for the survival of individuals, and their dysfunction is common in several neuropsychiatric and neurodevelopmental disorders including autism, where impaired sociability is one of the core diagnostic symptoms and compromises the interpretation of social cues, with an apparent lack of interest in others. Among the neurodevel opmental disorders associated with autism, Rett syndrome (RTT) is a disorder predominantly affecting females and caused by spontaneous loss-of-function mutations in the X-linked MECP2 gene, which encodes the transcriptional regulator MeCP2 that regulates many critical genes. RTT individuals have impaired motor, cognitive, and social abilities most of which are recapitulated …


Optimizing Electrode Configurations For Eeg Mild Cognitive Impairment Detection, Yi Jiang, Xin Zhang, Zhiwei Guo, Xiaobo Zhou, Jiayuan He, Ning Jiang Jan 2025

Optimizing Electrode Configurations For Eeg Mild Cognitive Impairment Detection, Yi Jiang, Xin Zhang, Zhiwei Guo, Xiaobo Zhou, Jiayuan He, Ning Jiang

Faculty, Staff and Student Publications

The Optimal electrode configuration of Electroencephalograms (EEG) systems for mild cognitive impairment (MCI) detection and monitoring in non-clinical settings, i.e. number of electrodes and the positions of the electrodes, remains to be explored. In the current study, we explored the optimization of electrode configuration for MCI detection. We used a 32-channel EEG device to record the data of 21 MCI patients and 20 cognitively normal elderly (NC) undergoing working memory (WM) tasks. Based on the differential value (MCI group vs. NC group) from the Power Spectral Density (PSD) value of each electrode in θ and α frequency band during WM …


Minimally Invasive Non-Expansile Tubular Extradural Posterior Fossa Decompression (Minted Technique) For The Management Of Chiari I.5 Malformation: Historical Overview Of Surgical Techniques, Technical Note, Proof Of Concept, Illustrative Case And Case Series. Lesser Is Better, José Alberto Israel Romero Rangel, Manuel Eduardo Soto García, Sergio Soriano Solís, Carlos Raúl Rangel Morales, Gerson Reyes Rodríguez, José Antonio Soriano Sánchez Jan 2025

Minimally Invasive Non-Expansile Tubular Extradural Posterior Fossa Decompression (Minted Technique) For The Management Of Chiari I.5 Malformation: Historical Overview Of Surgical Techniques, Technical Note, Proof Of Concept, Illustrative Case And Case Series. Lesser Is Better, José Alberto Israel Romero Rangel, Manuel Eduardo Soto García, Sergio Soriano Solís, Carlos Raúl Rangel Morales, Gerson Reyes Rodríguez, José Antonio Soriano Sánchez

Archives of Neurosurgery

BACKGROUND: Chiari's Malformation surgical treatment has significantly changed since the "classical" technique description by Gardner (1950). It is probably the most commonly performed approach, even when multiple techniques are available because no substantial changes nor any clear surgical objectives have been made. OBJECTIVE: To demonstrate a new cutting-edge surgical technique mastering the advantage of each surgical procedure ever described in the history of Chiari's Malformation establishing three critical points in surgical technique: clear patient-specific surgical goals, dynamic posterior fossa reconstruction, and extradural occipitoatlantal dense-adhesions release. METHODS: A comprehensive review of historically described approaches, proof of concept of surgical technique in …


High-Grade Avm. Educational Vignette And Clinical Cases, Marcos Devanir Silva Da Costa, Marcelo Augusto Acosta Goiri, Daniela Coelho, Juan Alberto Paz Archila, Talita Helena Martins Sarti, Feres Chaddad-Neto Jan 2025

High-Grade Avm. Educational Vignette And Clinical Cases, Marcos Devanir Silva Da Costa, Marcelo Augusto Acosta Goiri, Daniela Coelho, Juan Alberto Paz Archila, Talita Helena Martins Sarti, Feres Chaddad-Neto

Archives of Neurosurgery

The arteriovenous malformation (AVM) is a vascular malformation characterized by fistulas between arteries and veins forming a nidus, without interposition of capillary vessels and of which early draining vein is identified at the digital angiography. Potential reports of its existence date from the second century AD. Spetzler and Martin (S-M) proposed a classification considering three features and Lawton then added new predictors. A maximum of 10 score can be achieved by applying the modified S-M grade system. This classification guides decision-making and the possible choice of the multimodal treatment (surgery, radiosurgery and embolization). We discuss historical, pathological, clinical and therapeutic …


Heart Rate Variability Following Blood Flow Restriction Resistance Exercise And Traditional Resistance Exercise In Trained Men And Women, Michael R. Perlet, Lauren I. Mendonça, Peter A. Hosick, Nicholas Licameli, Evan L. Matthews Jan 2025

Heart Rate Variability Following Blood Flow Restriction Resistance Exercise And Traditional Resistance Exercise In Trained Men And Women, Michael R. Perlet, Lauren I. Mendonça, Peter A. Hosick, Nicholas Licameli, Evan L. Matthews

Research Data

Autonomic nervous system responses are attenuated following blood flow restriction (BFR) resistance exercise vs traditional resistance exercise (TRE) in men, but women’s responses are unknown. The purpose of this investigation is to compare the effects of a single BFR vs TRE session on HRV. Thirty-nine adults (M=20, W=19, age: 23±4yrs, body mass: 72.3±13.2kg, height: 169±9cm) participated in the study. Barbell back squat 1 repetition maximum (1RM) testing was performed followed by two randomized and counterbalanced exercise visits ≥48hrs apart (BFR: 4 sets, 30-15-15-15 repetitions, 30% 1RM, 60s rest; TRE: 4 sets x 10 repetitions, 70% 1RM, 60s rest). Pre- and …


Impact Of Tranexamic Acid On Patient Outcomes In Intracranial Hemorrhage: A Review, William G. Johnson Jan 2025

Impact Of Tranexamic Acid On Patient Outcomes In Intracranial Hemorrhage: A Review, William G. Johnson

The PA Department Journal of Medical Science

Introduction: Intracranial hemorrhage is a medical emergency that remains a significant source of death and disability for patients globally. Tranexamic acid has shown promise in treating trauma related bleeding loss in various settings. This study aims to evaluate its role in the management of intracranial hemorrhages.

Methods: A review of data in the PubMed National Library of Medicine was conducted to find relevant and reputable studies related to this topic. Using the search “tranexamic acid AND intracranial hemorrhage*” and the following filters: last 5 years, free full text, English language, including RCTs, meta-analyses, and systematic reviews, 13 results …


A Case Study: Alzheimer’S Progression In Mri, Lacey E. Sorber Jan 2025

A Case Study: Alzheimer’S Progression In Mri, Lacey E. Sorber

Medical Imaging Senior Posters

Alzheimer’s is a neurodegenerative disorder that affects millions of Americans. Many individuals know a person who is currently suffering from Alzheimer’s or has lost their life due to the disease. Alzheimer’s can be described as early-onset or late-onset. Early-onset Alzheimer's occurs before the age of 65, and late-onset occurs after the age of 65. This research demonstrates a case study of a 63 year old male with early-onset Alzheimer’s. Symptoms of Alzheimer’s include memory loss, cognitive decline, behavioral changes, and language problems. The patient in this case study’s symptoms began with memory loss and began to regress into cognitive decline. …


Investigation Of Heterosynaptic Long-Term Potentiation Of Non-Nociceptive Synapses, Synaptically Relevant Kinase Discovery, And Virtual Screening For A Pkmz Inhibitor In Hirudo Verbana", Avery Franzen Jan 2025

Investigation Of Heterosynaptic Long-Term Potentiation Of Non-Nociceptive Synapses, Synaptically Relevant Kinase Discovery, And Virtual Screening For A Pkmz Inhibitor In Hirudo Verbana", Avery Franzen

Dissertations and Theses

There is a considerable lack in efficacy for current chronic pain treatments. One therapy that has gained attention are cannabinoid-based medications. However, preclinical and clinical trials do not produce anti-nociceptive results consistently and occasionally produce pro-nociceptive results. Understanding this ambiguity between anti-nociceptive and pro-nociceptive effects is vital to cannabinoids’ future utilization. One symptom of chronic pain conditions is allodynia in which pain is perceived following non-painful stimuli. This may be due to non-nociceptive afferents activating nociceptive circuitry in an abnormal manner. Using the medicinal leech, Hirudo verbana, we have begun to elucidate mechanisms by which endocannabinoids strengthen non-nociceptive afferent synapses. …


Deep Dive In Sound Filtering, Cecilia Zoutewelle Jan 2025

Deep Dive In Sound Filtering, Cecilia Zoutewelle

A. The Science of Sound

A 7-page report, with illustrations and bullet-point summaries, on the ways we filter sounds as part of the standard process of hearing. Includes brief considerations of evolution, selective listening in conversations, and listening bias.


Optimizing Decision-Making In A Cerebral Palsy Model Using Reinforcement Learning, Richard Ampah Jan 2025

Optimizing Decision-Making In A Cerebral Palsy Model Using Reinforcement Learning, Richard Ampah

Pitzer Senior Theses

This study presents an original interdisciplinary investigation into how reinforcement learning (RL) can model motor and cognitive defects and potentially improve motor and cognitive functions in individuals with cerebral palsy (CP), a non-progressive neurological disorder that impairs movement and adaptability. Integrating computational neuroscience and machine learning, the research applies policy gradient methods and Markov Decision Processes (MDPs) to simulate adaptive learning in agents with and without CP-related constraints.

The central aim is to compare the cumulative rewards of optimal policies, derived from value iteration, and human-like learning policies using the REINFORCE algorithm, both with and without the Bellman baseline. The …


Endoneurial Immune Interplay In Peripheral Nerve Repair: Insights And Implications For Future Therapeutic Interventions, Alina Sprenger-Svačina, Martin K R Svačina, Husniye G Otlu, Tong Gao, Kazim A Sheikh, Gang Zhang Jan 2025

Endoneurial Immune Interplay In Peripheral Nerve Repair: Insights And Implications For Future Therapeutic Interventions, Alina Sprenger-Svačina, Martin K R Svačina, Husniye G Otlu, Tong Gao, Kazim A Sheikh, Gang Zhang

Faculty, Staff and Student Publications

The mechanisms underlying axonal injury and repair in peripheral nerves, whether due to traumatic damage or autoimmune neuropathies, are complex and not yet fully understood. Recent research indicates that an orchestrated interplay between damaged neurons, Schwann cells, and especially endoneurial immune cells such as macrophages or T cells is crucial to achieve satisfactory nerve recovery. Following axonal injury, degenerating axons and reactive Schwann cells release chemoattractants and cytokines that recruit immune cells into the endoneurium. Among them, macrophages play a pivotal role by clearing axonal and myelin debris and subsequently creating a pro-regenerative microenvironment that supports axonal outgrowth. There is …


From Misinformation To Policy Solutions: Teaching Herd Immunity And Vaccine Hesitancy Through Real-World Case Studies Of Measles Outbreaks, Laurieann Klockow Jan 2025

From Misinformation To Policy Solutions: Teaching Herd Immunity And Vaccine Hesitancy Through Real-World Case Studies Of Measles Outbreaks, Laurieann Klockow

Biomedical Sciences Faculty Research and Publications

Vaccine hesitancy threatens herd immunity, contributing to the resurgence of measles outbreaks. This lesson engages upper-level biomedical science students in analyzing the complex interplay between vaccination rates, herd immunity and vaccine exemption policies through examination of the 2019 New York measles outbreak that threatened the United States’ measles elimination status. Students critically evaluate anti-vaccine misinformation, analyze epidemiological data and develop evidence-based policy recommendations to increase vaccination rates. The lesson combines team-based learning with authentic assessment through vaccine policy development, moving beyond knowledge acquisition and content to building scientific literacy and evidence-based reasoning skills essential for scientifically literate citizens and future …