Neurology Commons^™

Case Report: Haemophilus Influenzae Meningitis In A 65 Year Old Female, Kaywan Saed, Russell Mordecai

Rowan-Virtua Research Day

We report a case of a 65-year-old female who presented with fever, altered mental status, and neck stiffness. Cerebrospinal fluid (CSF) analysis confirmed Haemophilus influenzae meningitis. The differential diagnosis of bacterial meningitis in older adults is broad and includes Streptococcus pneumoniae, Neisseria meningitidis, Listeria monocytogenes, and Haemophilus influenzae. However, in the post-Hib vaccine era, non-typeable H. influenzae has emerged as a significant cause of invasive disease in older adults, particularly in those with underlying comorbidities.

Older patients often present with atypical symptoms, which may delay diagnosis and treatment. In this case, early recognition and prompt administration of empiric antibiotic therapy …

Reviewing The Effect Of Antiplatelet Therapy On Lumbar Puncture Complications, John Andre Socci

Rowan-Virtua Research Day

Reviewing The Effect of Antiplatelet Therapy on Lumbar Puncture Complications aims to assess literature that discusses the possible risks of undergoing lumbar puncture while on antiplatelet therapy. Lumbar punctures offer vital information that can help guide making accurate diagnosis and creating appropriate treatment plans. However, a large portion of the population is on antiplatelet therapy for cardiovascular and cerebrovascular disease prevention. While there are many benefits to being on these medicines, patients are at increased risk for bleeding. Thus the clinical question as to whether or not proceed with lumbar puncture on patients taking antiplatelet therapy involves weighing risks and …

Frequency Modulation Of Deep Brain Stimulation Targeting The Periaqueductal Gray: Effects On Pain Perception And Autonomic Regulation, Jack Hennen, Avneet Chawla, Jared Garfinkle, Wen Hao Luo

Rowan-Virtua Research Day

Introduction:

The periaqueductal gray (PAG) is a midbrain structure, and effective target for deep brain stimulation (DBS), involved in the modulation of a multitude of sensory and autonomic processes. It has distinct functional columnar organization, with each column playing its own role in alteration of the body’s ability to respond to pain and stressful stimuli.

Background:

Research regarding the effects of DBS on the PAG has shown the four main subregions of the PAG: the dorsomedial PAG (dmPAG), dorsolateral PAG (dlPAG), lateral PAG (lPAG), and ventrolateral PAG(vlPAG), produce various physiologic outputs when stimulated. These outputs are region and frequency dependent. …

Mechanisms Mediating The Protective Effects Of Caffeine On Alzheimer’S Disease Progression, Jessica Ivanov, Malky Bernat, Joshua Drawbaugh, Jeremy Mehta, Namira Rahmani, Saikumar Thellapally

Rowan-Virtua Research Day

Background: This review aims to examine the molecular mechanisms through which caffeine may exert neuroprotective effects against Alzheimer’s Disease (AD).

Methods: A literature review was done across PubMed and Embase to identify studies between 2000 and 2024, exploring the mechanism behind caffeine’s effects on AD. The criteria focused on peer-reviewed articles involving human or animal models. Information was gathered on study design, participant characteristics, caffeine consumption, proposed mechanisms, and effects on cognition.

Results: The studies support caffeine's potential as a therapeutic, neuromodulator against AD through six mechanisms: inhibition of adenosine A2A receptors, decreased amyloid-beta production and aggregation, promotion of amyloid …

Effectiveness Of Mind-Body Therapy Techniques In The Management Of Chronic Pain, Esha Sharma, Kalyna Leshchuk, Maria Cox, Kaitlyn Koo, Emily Sarett, Sarah Chen

Rowan-Virtua Research Day

In this review, we aim to determine whether mind-body therapies—defined here as mindfulness meditation, cognitive behavioral therapy (CBT), and mindfulness-based stress reduction (MBSR)—can effectively improve pain management in adults with chronic lower back pain, particularly when compared to standard opioid treatments alone or used in conjunction with them. Our hypothesis posits that mind-body therapies serve as valuable supplements to current opioid-based treatment plans, potentially improving not only pain outcomes but also overall quality of life and psychological well-being.

By synthesizing findings from randomized controlled trials (RCTs) and meta-analyses, this review builds on existing literature by narrowing the treatment scope and …

Dido Times In Anterior Lvo Ischemic Stroke, Greg Palmateer, Anthony Gasparotto, Angelique Manasseh

Posters

• Acute ischemic stroke is a major cause of death and disability. Every 30 minute delay in time from onset to treatment lowers the likelihood of a good outcome.1

• Door-in-door-out (DIDO) is defined as the duration from time of arrival at a primary stroke center (PSC) to time of discharge to a comprehensive stroke center (CSC) for mechanical thrombectomy(MT). Shorter DIDO time relates to improved outcomes.

• There is no standardized DIDO for ischemic stroke, though the American Heart Association (AHA) offers an ideal DIDO time of < 90 minutes for 50% or more of patients.2

Case Report: An Unexpected Case Of Spinal Cord Infarction, Julian Coz, Brittany Fera

Rowan-Virtua Research Day

We report a case of an 89-year-old male who presented to the emergency department with acute bilateral lower extremity weakness after physical exertion. His clinical examination revealed paraplegia, and imaging studies suggested spinal cord infarction (SCI) secondary to presumed atherosclerotic embolism, despite the absence of traditional cardiovascular risk factors. The differential diagnosis for acute paraplegia in the elderly is broad, including conditions like stroke, spinal cord compression, transverse myelitis, and tick paralysis. This case highlights the diagnostic challenges of SCI, particularly when the patient lacks overt risk factors for vascular disease. Despite aggressive management, including permissive hypertension and anticoagulation, the …

Case Report: Transverse Myelitis In The Setting Of Generalized Weakness, Aloysius Ibe, Brittany Fera

Rowan-Virtua Research Day

We report a case of a 79-year-old female who presented to the Emergency Department for generalized weakness and was diagnosed with transverse myelitis. The differential for generalized weakness is vast but for a patient who is able to perform activities of daily living with no assistance to now being unable to ambulate puts cauda equina, stroke, and brain lesion at the forefront until MRI gave the definitive diagnosis of transverse myelitis. Transverse myelitis (TM) is a neurologic disorder caused by inflammation of the spinal cord, specifically the material called myelin sheath that covers the nerve cell fibers.

The Effectiveness Of Ras Treatment In Improving Gait Patterns In Patients With Parkinson’S Disease: A Literature Review, Vivian Huang, Andrea Hunt, Alicia Chopyk

Rowan-Virtua Research Day

Parkinson’s Disease (PD) is a neurodegenerative disorder involving the loss of dopaminergic neurons leading to symptoms such as tremor and gait disturbance. This results in the classic shuffling gait: stooped posture, variation in stride length, variation in cadence, reduced gait velocity, inability to maintain a steady rhythm, and an increased fear of falling. This study’s objective is to review the current literature on the use of rhythmic auditory stimulation (RAS)Ⓡ as a treatment option for PD. Previous research has looked at RASⓇ as a potential non-pharmacologic treatment because researchers hypothesize that listening to music produces an external rhythm that the …

A Case Report Of Primary Central Nervous System Lymphoma Presenting With Diabetes Insipidus, Lan Ngo, Adam Kandil

Rowan-Virtua Research Day

Diabetes insipidus (DI) is characterized by decreased secretion or action of antidiuretic hormone (ADH), resulting in polyuria, polydipsia, and potential electrolyte disturbances. Severe hypernatremia secondary to uncontrolled DI can manifest with neurologic symptoms including seizure-like activity. This case report discusses a case of central DI arising from damage to the pituitary gland as the first presentation of a brain tumor, in the context of a 56-year-old patient who presented with seizure-like activity and sensory changes.

Case Report: Lamotrigine-Induced Rash In An Adult Patient, Dhruvin Patel, James Espinosa, Alan Lucerna

Rowan-Virtua Research Day

Lamotrigine (Lamictal®) is a commonly prescribed anticonvulsant and mood-stabilizing medication. One of the rare but serious adverse effects of lamotrigine is the development of a drug-induced rash, which can be potentially life-threatening. This case report highlights the occurrence of a drug-induced rash in a 33-year-old female patient who was prescribed lamotrigine for the management of bipolar disorder. The patient presented with a characteristic rash, and following timely intervention, the rash resolved without complications. This case emphasizes the importance of monitoring for early signs of rash in patients receiving lamotrigine and outlines management strategies.

Case Report: Idiopathic Intracranial Hypertension With Venous Sinus Stenosis In A Young Female, Zain Raza

Rowan-Virtua Research Day

We report a case of a 19-year-old female who presented with transient, painless left eye vision loss and left-sided headache for 2 weeks. The patient, a known carrier of TTN mutation, which is a gene code for titin (mutations are inherited in an autosomal dominant pattern). The patient was diagnosed with idiopathic intracranial hypertension secondary to bilateral transverse sigmoid venous sinus stenosis. The differential diagnosis included ocular migraine, transient ischemic attack) and optic neuritis, but subsequent imaging and lumbar puncture revealed elevated intracranial pressure and significant venous stenosis. This case highlights the importance of an early identification and intervention to …

Case Report: Todd’S Paralysis In A Patient With An Extensive Stroke History, Thuc Vu, Kishan B. Patel

Rowan-Virtua Research Day

Here we present the case of a 70-year-old patient who presented to the emergency department with altered mental status, left-sided gaze preference, left-sided hemineglect, and inability to follow commands. He had a past medical history of seizure activity and cerebrovascular accident (CVA) with residual dysarthria and was on apixaban. His symptoms began after seizure activity and improved gradually. He was ultimately diagnosed by stroke neurology as having had an episode of Todd’s Paralysis. The differential diagnosis for patients for altered mental status with neurological deficits can be vast, but, in general, Todd’s Paralysis can be an ischemic stroke mimic upon …

Case Report: Recurrent Miller Fisher Syndrome, Devin Hoover, Andrew Vasta, James Espinosa, Alan Lucerna

Rowan-Virtua Research Day

We report the case of a 47-year-old male who presented with numbness and difficulty speaking and was diagnosed with Miller Fisher Syndrome, a variant Guillain-Barré Syndrome. The differential diagnosis for numbness and speech difficulty is broad and includes brain stem stroke, Wernicke encephalopathy, botulism, myasthenia gravis, among others. Although Miller Fisher Syndrome is rare, certain factors such as the of tumor necrosis factor-alpha antagonists may predispose a patient to the disease and its recurrence. As discovery of new tumor necrosis factor-alpha antagonists continues it will likely result in more presentations of Guillain-Barré Syndrome and its variants to the emergency department.

Miller Fisher Variant Of Guillain- Barré Syndrome, Peter Killian, Kishan B. Patel

Rowan-Virtua Research Day

We present a case of a man in his 50s who was evaluated in the emergency department for right facial droop, myalgias, and right lower extremity weakness. The patient required multiple interdisciplinary specialists for treatment and diagnosis of Guillain-Barré Syndrome (GBS). The differential for weakness and facial droop is primarily aimed at ruling out an irreversible neurological cause while investigating a potential infectious etiology. Multiple variants of GBS exist and clinical presentations can vary, including the Miller Fisher Variant. This variant features a unique presentation, affecting the corticobulbar tract, evident with the ptosis commonly seen following a gastrointestinal infection.

Case Report: Dysphagia In Inclusion Body Myositis Leading To Respiratory And Gastrointestinal Complications, Veroneka Mikhail, James Espinosa, Alan Lucerna

Rowan-Virtua Research Day

Inclusion body Myositis (IBM) stands as a rare and complex neuromuscular disorder (NMD) characterized by progressive muscle weakness and atrophy. Among its cardinal symptoms are dysphagia and respiratory distress, which are the most common cause of death in this disease. While the differential diagnosis of respiratory distress is vast and includes aspiration, pneumonia, acute coronary syndrome, emphysema, and congestive heart failure, a clinician should recognize that respiratory distress can also be secondary to dysphagia in NMDs like IBM and can quickly become life threating. Here we present the case of a 68-year-old female with a history of IBM who presented …

Navigating Transition To Adulthood In Epilepsy Patients: A Multidisciplinary Approach., Yinchen Song, L David Klemens, Hallie Orton, Audrey R. Kennedy, Jana E. Jones, Sucheta Joshi, Meghann Kelly

Manuscripts, Articles, Book Chapters and Other Papers

The transition from pediatric to adult healthcare systems is a critical yet complex process for individuals with epilepsy, requiring careful attention to both medical and psychosocial aspects. This review highlights best practices and strategies to facilitate effective transitions, focusing on the roles of multidisciplinary teams, communication strategies, shared decision-making, and transition readiness assessment. Key topics include early and ongoing communication, promoting patient autonomy, addressing mental health comorbidities, and implementing transition readiness assessments such as the Epilepsy Transition Readiness Assessment Questionnaire (EpiTRAQ). Additionally, the review evaluates models for transition clinics, emphasizing the importance of sustainability, collaboration, and tailored interventions. By leveraging …

Global Multi-Specialty Clinician Perspectives On The Implementation Of Alzheimer's Disease Blood Biomarkers, Joanne Rodda, Lindsey A. Kuchenbecker, Wyllians V. Borelli, Mari L. Demarco, Raphael M. Castilhos, Erin E. Cawston, Tinatin Chabrashvili, Melissa M. Budelier, Claudia Duran Aniotz, Chinedu Momoh

Brain and Mind Institute

Introduction: Clinicians' views on the clinical readiness of Alzheimer's disease (AD) blood biomarkers (BBMs) are not well understood.

Methods: The Alzheimer's Association International Society to Advance Alzheimer's Research and Treatment Biofluid-Based Biomarkers Professional Interest Area conducted a survey to elicit clinician opinions on AD BBM implementation, including contexts of use, assay selection, reporting, and result interpretation.

Results: Clinician respondents (n = 212) practiced in Europe (56%), North America (24%), the Caribbean and Central/South America (11%), and other continents (9%). Most respondents were medical doctors (80%) practicing in secondary or tertiary care (88%). For 56%, cerebrospinal fluid AD …

A Retrospective Pilot Study Assessing The Concordance Between Referral Diagnoses, Referring Physician Specialty, And Emg/Ncv Results, Bodrul Islam, Daniel L. Menkes

Posters

• Electromyoneurography (EMG/NCV) combines nerve conduction studies and needle electromyography.1 Patients are referred with a diagnostic hypothesis to be tested.
• Nerve conduction studies assess large myelinated fibers, and needle EMG evaluates type I muscle fibers. Conditions affecting small fibers (e.g., neuropathic pain) or type II fibers (e.g., steroid myopathy) typically yield normal results, limiting the utility of EMG/NCV for their evaluation.1,2,3
• Moreover, many patients are referred for EMG/NCV testing for nonspecific symptoms such as pain or numbness, often without objective neurological deficits.
• This study was conducted to determine the concordance of the EMG referral with the provider’s specialty and the final …

Genome-Wide Association Meta-Analyses Of Drug-Resistant Epilepsy, Costin Leu, Andreja Avbersek, Remi Stevelink, Helena Martins Custodio, Siwei Chen, Doug Speed, Caitlin A Bennett, Lina Jonsson, Unnur Unnsteinsdóttir, Andrea L Jorgensen, Gianpiero L Cavalleri, Norman Delanty, John J Craig, Chantal Depondt, Michael R Johnson, Bobby P C Koeleman, Emadeldin Hassanin, Maryam Erfanian Omidvar, Roland Krause, Holger Lerche, Anthony G Marson, Terence J O'Brien, Josemir W Sander, Graeme J Sills, Pasquale Striano, Federico Zara, Hreinn Stefansson, Kari Stefansson, Patrick May, Benjamin M Neale, Dennis Lal, Samuel F Berkovic, Epi25 Collaborative, Epipgx Consortium, Sanjay M Sisodiya

Faculty, Staff and Student Publications

Background: Epilepsy is one of the most common neurological disorders, affecting over 50 million people worldwide. One-third of people with epilepsy do not respond to currently available anti-seizure medications, constituting one of the most important problems in epilepsy. Little is known about the molecular pathology of drug resistance in epilepsy, in particular, possible underlying genetic factors are largely unknown.

Methods: We performed a genome-wide association study (GWAS) in two epilepsy cohorts of European ancestry, comparing drug-resistant (N = 4208) to drug-responsive individuals (N = 2618) followed by meta-analyses across the studies. Next, we performed subanalyses split into two broad subtypes: …

Cortical Structure In Nodes Of The Default Mode Network Estimates General Intelligence, Abhinav Yadav, Archana Purushotham

Faculty, Staff and Students Publications

Introduction: A growing number of studies implicate functional brain networks in intelligence, but it is unclear if network nodal structure relates to intelligence.

Methods: Using MRI, we studied the relationship of the general intelligence factor (g) with cortical thickness (CT), local gyrification index (LGI), and voxel-based morphometry in the nodes of the default mode network (DMN) and task-positive network (TPN) in a cohort of 44 young, healthy adults. Employing a novel strategy, we performed repeated analyses with multiple sets of g estimates to remove false positives.

Results: CT and LGI in medial and temporal nodes of the DMN were reliably …

Otolaryngology-Assisted Approach For Anterior Cervical Discectomy And Fusion, M Benjamin Larkin, Anthony K Allam, Cyrus B King, N Eddie Liou, Alexander E Ropper

Faculty, Staff and Students Publications

First introduced in 1955, anterior cervical discectomy and fusion (ACDF) surgery has seen minimal changes over the years. Its reproducibility, impressive long-term results, and minimal complication rates have established it as one of the most frequently performed cervical spinal fusion surgeries. Yet, postoperative dysphagia remains a concern with a 60% incidence rate. An otolaryngologist's expertise regarding cervical fascial anatomy can inform the spine surgeon's approach to an ACDF to potentially reduce postoperative dysphagia rates. We describe an illustrative case of a 35-year-old woman who presented with 8/10 neck and arm pain along with numbness in her fourth and fifth digits …

Challenges And Opportunities Of Acquiring Cortical Recordings For Chronic Adaptive Deep Brain Stimulation, Jeffrey Herron, Aura Kullmann, Timothy Denison, Wayne K Goodman, Aysegul Gunduz, Wolf-Julian Neumann, Nicole R Provenza, Maryam M Shanechi, Sameer A Sheth, Philip A Starr, Alik S Widge

Faculty, Staff and Students Publications

Deep brain stimulation (DBS), a proven treatment for movement disorders, also holds promise for the treatment of psychiatric and cognitive conditions. However, for DBS to be clinically effective, it may require DBS technology that can alter or trigger stimulation in response to changes in biomarkers sensed from the patient's brain. A growing body of evidence suggests that such adaptive DBS is feasible, it might achieve clinical effects that are not possible with standard continuous DBS and that some of the best biomarkers are signals from the cerebral cortex. Yet capturing those markers requires the placement of cortex-optimized electrodes in addition …

Metastatic Medulloblastoma Remodels The Local Leptomeningeal Microenvironment To Promote Further Metastatic Colonization And Growth, Namal Abeysundara, Alexandra Rasnitsyn, Vernon Fong, Alexander Bahcheli, Randy Van Ommeren, Kyle Juraschka, Maria Vladoiu, Winnie Ong, Bryn Livingston, Pasqualino De Antonellis, Michelle Ly, Borja López Holgado, Olga Sirbu, Shahrzad Bahrampour, Hyun-Kee Min, Jerry Fan, Carolina Nor, Abhirami Visvanathan, Jiao Zhang, Hao Wang, Lei Qin, Ning Huang, Jonelle Pallotta, Tajana Douglas, Esta Mak, Haipeng Su, Karen Ng, Kevin Yang Zhang, Craig Daniels, Calixto-Hope G Lucas, Charles G Eberhart, Hailong Liu, Tao Jiang, Faiyaz Notta, Vijay Ramaswamy, Jüri Reimand, Marco Gallo, Jeremy N Rich, Xiaochong Wu, Xi Huang, Michael D Taylor

Faculty, Staff and Students Publications

Leptomeningeal metastases are the major source of morbidity and mortality for patients with medulloblastoma. The biology of the leptomeningeal metastases and the local tumour microenvironment are poorly characterized. Here we show that metastasis-associated meningeal fibroblasts (MB-MAFs) are transcriptionally distinct and signal extensively to tumour cells and the tumour microenvironment. Metastatic cells secrete platelet-derived growth factor (PDGF) ligands into the local microenvironment to chemotactically recruit meningeal fibroblasts. Meningeal fibroblasts are reprogrammed to become MB-MAFs, expressing distinct transcriptomes and secretomes, including bone morphogenetic proteins. Active bone morphogenetic protein signalling and co-implantation of tumour cells with MB-MAFs enhances the colonization of the leptomeninges …

Maternal-Fetal Surgery For Myelomeningocele Longitudinal Follow-Up Model: Mitigation Of Care Fragmentation Through Care Coordination And Outcomes Reporting, Jonathan Castillo, Mary M Locastro, Romain Corroenne, Anjali Malhotra, Alexander Van Speybroeck, Grace Lai, Michael A Belfort, Magdalena Sanz Cortes, Heidi Castillo

Faculty, Staff and Students Publications

Purpose

Methods

Results

Author Correction: Disruption Of Neural Periodicity Predicts Clinical Response After Deep Brain Stimulation For Obsessive-Compulsive Disorder, Nicole R Provenza, Sandesh Reddy, Anthony K Allam, Sameer V Rajesh, Nabeel Diab, Gabriel Reyes, Rose M Caston, Kalman A Katlowitz, Ajay D Gandhi, Raphael A Bechtold, Huy Q Dang, Ricardo A Najera, Nisha Giridharan, Katherine E Kabotyanski, Faiza Momin, Mohammed Hasen, Garrett P Banks, Brian J Mickey, Brent M Kious, Ben Shofty, Benjamin Y Hayden, Jeffrey A Herron, Eric A Storch, Ankit B Patel, Wayne K Goodman, Sameer A Sheth

Faculty, Staff and Students Publications

No abstract provided.

Guillain-Barré Syndrome Following Moderna Spikevax Messenger Rna Covid-19 Vaccine: A Case Analysis, Jamie Lee Aldakkour, Alvin Boyd Newman-Caro, Hector Gonzalez-Montalvo, Usama Bardan, Guruswamy Ramamurthy

HCA Healthcare Journal of Medicine

Background

Guillain-Barré Syndrome (GBS) is an acute autoimmune polyneuropathy. Cases of GBS have been reported following administration of the vaccines for swine influenza, seasonal influenza, hemagglutinin type 1 and neuraminidase type 1, and meningococcal disease. Despite these links, a causal relationship has not been confirmed.

Case Presentation

We present a case of a 70-year-old woman who presented with progressive bilateral ascending weakness and numbness and reported receiving the first dose of the Moderna COVID-19 vaccine 2 weeks prior to presentation.

Conclusion

At the time of writing, this is the first reported case of GBS following the Moderna Spikevax COVID-19 vaccine. …

Comparison Of Outcomes Among Neurovascular Patients Managed In Dedicated Neurological Intensive Care Units Vs. General Intensive Care Units, Joanna Roy, Basel Musmar, Nassos Tziviskos, Saarang Patel, Roberto Deleon, Ashley Thommana, Shady Mina, Stavropoula Tjoumakaris, Michael Gooch, Robert Rosenwasswer, Pascal Jabbour

Department of Neurosurgery Faculty Papers

Background/Objectives: Patients with neurovascular conditions often require multidisciplinary management to optimize recovery. Our systematic review identifies literature comparing outcomes among neurovascular patients managed at dedicated neurological intensive care units (ICUs) compared to general ICUs. Methods: PubMed was searched to identify articles that reported outcomes among patients managed at dedicated neurological ICUs versus general ICUs. Articles that reported outcomes among patients with neurovascular conditions were included. Articles that reported outcomes among patients managed at stroke units were excluded. The Newcastle Ottawa Scale (NOS) was used to assess for risk of bias across individual studies. Results: After a title and abstract screen …

Mapping The Developmental Profile Of Ventricular Zone-Derived Neurons In The Human Cerebellum, Anders W Erickson, Henry Tan, Liam D Hendrikse, Jake Millman, Zachary Thomson, Joseph Golser, Omar Khan, Guanyi He, Kathleen Bach, Arpit Suresh Mishra, Janja Kopic, Zeljka Krsnik, Ferechte Encha-Razavi, Giulia Petrilli, Fabien Guimiot, Evelina Silvestri, Kimberly A Aldinger, Michael D Taylor, Kathleen J Millen, Parthiv Haldipur

Faculty, Staff and Students Publications

The cerebellar ventricular zone (VZ) is the primary source of progenitors that generate cerebellar GABAergic neurons, including Purkinje cells (PCs) and interneurons (INs). This study provides detailed characterization of human cerebellar GABAergic neurogenesis using transcriptomic and histopathological analyses and reveals conserved and unique features compared to rodents. We show that the sequential progression of neurogenesis is conserved and occurs before 8 postconception weeks. Notably, PC differentiation occurs in the outer subventricular zone (SVZ), a region absent in the mouse cerebellum. Human PCs are generated during a compact two-week period before the onset of cerebral cortex histogenesis. A subset of human …

Task Demands Influence Search Strategy Selection In Otoconia-Deficient Mice, Ryan M. Yoder, Lucas C. Carstensen, Keshav Jagannathan

Psychology

Introduction: The vestibular system plays a crucial role in visual and non-visual navigation. Our recent study found that signals from the otolith organs are necessary for mice’s use of distal visual cues to guide navigation to an invisible goal. Somewhat surprisingly, however, performance was not significantly impaired on some spatial tasks (e.g., Barnes maze reference memory task), questioning the role of otolith signals in visual navigation.

Methods: We report the results of several additional tests of reference memory performance and search strategy use on two versions of the Barnes maze, in an attempt to establish further understanding of the otolithic …