Neurology Commons^™

Filled/Non-Filled Pairs: An Empirical Challenge To The Integrated Information Theory Of Consciousness, Amber R. Hopkins, Kelvin J. Mcqueen

Philosophy Faculty Articles and Research

Perceptual filling-in for vision is the insertion of visual properties (e.g., color, contour, luminance, or motion) into one’s visual field, when those properties have no corresponding retinal input. This paper introduces and provides preliminary empirical support for filled/non-filled pairs, pairs of images that appear identical, yet differ by amount of filling-in. It is argued that such image pairs are important to the experimental testing of theories of consciousness. We review recent experimental research and conclude that filling-in involves brain activity with relatively high integrated information (Φ) compared to veridical visual perceptions. We then present filled/non-filled pairs as …

A Literature Review Of Mild Traumatic Brain Injury Research, Brindlea Peterson

Honors Theses

Mild traumatic brain injuries (mTBI) are a type of traumatic brain injury (TBI) usually sustained from an injury to the head and are hard to diagnose due to the lack of physical evidence seen in diagnostic radiology. The estimated worldwide rate of incidence each year is 42 million, making mTBIs rather common. In the US armed forces, that rate of incidence is even higher due to the dangerous nature of the work being done. Many complications can come from not properly addressing an mTBI after it happens which makes being able to determine an appropriate return-to-play or return-to-duty time very …

Transition Program To Postsecondary Education For Students With Traumatic Brain Injury, Eung Gyeong Park, Susan Macdermott, Becki Cohill, Karen Park

Fall 2021 Virtual OTD Capstone Symposium

Traumatic brain injury (TBI) is a condition that occurs due to an external blow to the skull that damages the brain (Carulli et al., 2018). According to the Centers for Disease Control and Prevention, 2.5 million TBI have been reported each year. Many students with TBI face physical, cognitive, environmental, and social challenges in their transition to post-secondary education (Bedell et al., 2017). Individuals with TBI experience social and behavioral changes that interfere with their participation as they face difficulties initiating, regulating their social behaviors, and experiencing increased introversion (Bedell et al., 2017). Physical challenges include fatigue, headaches, sleep disturbances, …

Dementia Risk Reduction: Why Haven't The Pharmacological Risk Reduction Trials Worked? An In-Depth Exploration Of Seven Established Risk Factors, Ruth Peters, John Breitner, Sarah James, Gregory A. Jicha, Pierre-Francois Meyer, Marcus Richards, A. David Smith, Hussein N. Yassine, Erin L. Abner, Atticus H. Hainsworth, Patrick G. Kehoe, Nigel Beckett, Christopher Weber, Craig Anderson, Kaarin J. Anstey, Hiroko H. Dodge

Neurology Faculty Publications

Identifying the leading health and lifestyle factors for the risk of incident dementia and Alzheimer's disease has yet to translate to risk reduction. To understand why, we examined the discrepancies between observational and clinical trial evidence for seven modifiable risk factors: type 2 diabetes, dyslipidemia, hypertension, estrogens, inflammation, omega-3 fatty acids, and hyperhomocysteinemia. Sample heterogeneity and paucity of intervention details (dose, timing, formulation) were common themes. Epidemiological evidence is more mature for some interventions (eg, non-steroidal anti-inflammatory drugs [NSAIDs]) than others. Trial data are promising for anti-hypertensives and B vitamin supplementation. Taken together, these risk factors highlight a future need …

Reduced Risk Of Reoperations With Modern Deep Brain Stimulator Systems: Big Data Analysis From A United States Claims Database, Chengyuan Wu, Sean J Nagel, Rahul Agarwal, Monika Pötter-Nerger, Wolfgang Hamel, Ashwini Sharan, Allison T Connolly, Binith Cheeran, Paul S Larson

Department of Neurosurgery Faculty Papers

Objective: There have been significant improvements in the design and manufacturing of deep brain stimulation (DBS) systems, but no study has considered the impact of modern systems on complications. We sought to compare the relative occurrence of reoperations after de novo implantation of modern and traditional DBS systems in patients with Parkinson's disease (PD) or essential tremor (ET) in the United States.

Design: Retrospective, contemporaneous cohort study.

Setting: Multicenter data from the United States Centers for Medicare and Medicaid Services administrative claims database between 2016 and 2018.

Participants: This population-based sample consisted of 5,998 patients implanted with a DBS system, …

Bi-Allelic Variants In Ogdhl Cause A Neurodevelopmental Spectrum Disease Featuring Epilepsy, Hearing Loss, Visual Impairment, And Ataxia, Zheng Yie Yap, Stephanie Efthymiou, Simone Seiffert, Karen Vargas Parra, Sukyeong Lee, Alessia Nasca, Reza Maroofian, Isabelle Schrauwen, Manuela Pendziwiat, Sunhee Jung, Elizabeth Bhoj, Pasquale Striano, Kshitij Mankad, Barbara Vona, Sanmati Cuddapah, Anja Wagner, Javeria Raza Alvi, Elham Davoudi-Dehaghani, Mohammad-Sadegh Fallah, Srinitya Gannavarapu, Costanza Lamperti, Andrea Legati, Bibi Nazia Murtaza, Muhammad Shahid Nadeem, Mujaddad Ur Rehman, Kolsoum Saeidi, Vincenzo Salpietro, Sarah Von Spiczak, Abigail Sandoval, Sirous Zeinali, Massimo Zeviani, Adi Reich, Synaps Study Group, University Of Washington Center For Mendelian Genomics, Cholsoon Jang, Ingo Helbig, Tahsin Stefan Barakat, Daniele Ghezzi, Suzanne M Leal, Yvonne Weber, Henry Houlden, Wan Hee Yoon

Faculty, Staff and Students Publications

The 2-oxoglutarate dehydrogenase-like (OGDHL) protein is a rate-limiting enzyme in the Krebs cycle that plays a pivotal role in mitochondrial metabolism. OGDHL expression is restricted mainly to the brain in humans. Here, we report nine individuals from eight unrelated families carrying bi-allelic variants in OGDHL with a range of neurological and neurodevelopmental phenotypes including epilepsy, hearing loss, visual impairment, gait ataxia, microcephaly, and hypoplastic corpus callosum. The variants include three homozygous missense variants (p.Pro852Ala, p.Arg244Trp, and p.Arg299Gly), three compound heterozygous single-nucleotide variants (p.Arg673Gln/p.Val488Val, p.Phe734Ser/p.Ala327Val, and p.Trp220Cys/p.Asp491Val), one homozygous frameshift variant (p.Cys553Leufs∗16), and one homozygous stop-gain variant (p.Arg440Ter). To support the …

The Truth About Brain Cells: Is Adult Neurogenesis Possible?, Ekene Nnagha, Queen-Helen Egbai, Ahtesham Khizar

Pakistan Journal of Neurological Sciences (PJNS)

Brain cells regeneration involves renewal and repair of neurons and other cells in the brain, with restoration of their functions. Although this phenomenon was thought to end in early childhood, research has proven that adult neurogenesis is highly possible with some limitations. Regeneration of axons in the central nervous system is very slow and more complicated than neuronal regeneration, especially regeneration of peripheral nerves. Brain cell regeneration in the adult brain can help in recovery of damaged brain cells and correct cellular and brain tissue dysfunction that are commonly seen in some neurological disorders such as Stroke, Traumatic Brain Injury …

Clinical Spectrum And Eeg Findings Of Non-Convulsive Status Epilepticus In Children, Shaila Ali, Natasha Ghani, Ather Khalily, Zia-Ur- Rehman, Tipu Sultan

Pakistan Journal of Neurological Sciences (PJNS)

ABSTRACT

OBJECTIVE:

To determine the clinical spectrum and EEG findings ofnon-convulsive status epilepticus in children. METHODS: A total of 38 children were included in this prospective cross sectional study, having EEG suggestive of NCSE after taking informed consent from guardians, keeping EEG as gold standard tracings were reviewed according to criteria of non-convulsive status epilepticus. Their clinical features were also noted leading to non- convulsive status epilepticus. Diagnostic workup will be done to find out the underlying cause, according to the suspected etiology of non-convulsive status epilepticus.

RESULTS: There were 26 male and 12 female patients, with ratio of 2:1. …

Frequency And Types Of Cerebral Infarctions On Brain Imaging In 2257 Hospitalized Patients With Covid-19, Raima Kaleemi, Zainab Rauf, Muhammad Azeemuddin, Muhammad Wasay

Pakistan Journal of Neurological Sciences (PJNS)

ABSTRACT BACKGROUND AND OBJECTIVE:

SARS-COV (COVID-19) virus is not solely a pulmonary disease but affect multiorgan system including the brain. The objective of this study was to see the frequency of neuroimaging findings especially cerebral infarcts in our covid population. METHODS: This study is a retrospective observational study conducted in a large tertiary care hospital which was also a Covid center from March 1, 2020 to December 30, 2020.The frequency of neurological manifestations in COVID19 positive patients admitting in the hospital was observed through charts review. All scans were reviewed by two trained neuroradiologists. RESULTS: Total of 2257 patients enrolled …

Grading Of Improvement In Hypsarrhythmia With Standard Epileptic Spasms Treatment At A Large Pediatric Tertiary Care Center, Julie Grace Gianakon, Roha Khalid, Mohammed Ilyas

Posters

Background Epileptic spasm is a peculiar type of epileptic seizure, entailing the clinical spasms and a characteristic electroencephalogram (EEG) abnormality often called hypsarrhythmia or its variants. The main goal of epileptic spasm treatment with standard therapy is to suppress clinical spasms and abolish the hypsarrhythmia and its variant EEG pattern. This interictal EEG pattern frequently heralds developmental regression. The elimination of hypsarrhythmia is a principal goal of therapy and a key outcome measure in clinical trials. There have been several studies in the interpretation or grading of hypsarrhythmia (Watanabe et al.1993 & Jeavons & Bower et al.1961). Still, there have …

Investigating The Role Of The Skeletal Muscle In Amyotrophic Lateral Sclerosis Neuromuscular Junction Dysfunction, Agnes Badu-Mensah

Electronic Theses and Dissertations, 2020-2023

Neuromuscular junction (NMJ) dysfunction has been identified as one of the earliest events in Amyotrophic Lateral Sclerosis (ALS) pathology. However, which tissue type induces NMJ disruption; be it the motoneurons (hMN), Schwann cells or skeletal muscle (hSKM) remains unresolved. While mechanisms by which ALS hMN contribute to NMJ dysfunction are well-described in literature, limited information exist on how the other tissue types in the tripartite synapse (hSKM and Schwann cells) induce and/or contribute to ALS NMJ disruption. A fair understanding of the role of each tissue type in NMJ dysfunction would help shape the trajectory of future ALS research and …

Artificial Intelligence And Neurology - Opportunities And Challenges In Pakistan, Adeel A. Memon, Junaid S. Kalia

Pakistan Journal of Neurological Sciences (PJNS)

The field of artificial intelligence (AI) has undergone rapid development in neurological disorders over the past few decades. AI relies on large volumes of high-quality data. As a result, their use in low-resource settings has been limited due to the lack of a digitized health care system. This article will address the challenges and opportunities involved in implementing AI for neurological care in Pakistan, as well as discuss the types of digital health care data and the benefits of applying AI in resource-limited countries

The Constellation Of Centronuclear Myopathy And Craniofacial Dysmorphism, Mahnoor Hafeez

Pakistan Journal of Neurological Sciences (PJNS)

ABSTRACT:

A 20 years old third-year MBBS female student from Dow Medical College in 2008 presented to the Neurology Dept. in Karachi with a short history of rapidly worsening bilateral lower limb weakness for 6 months. There was facial dysmorphism. Motor neuron disease was the suspicion; EMG/NCS study revealed non inflammatory myopathic process involving all limb muscles; Centro nuclear myopathy (CNM) was diagnosed via muscle biopsy. CNM is a group of congenital myopathies, where cell nuclei are abnormally located in skeletal muscle cells. Craniofacial dysmorphism is characterized by abnormal development of facial and skull structures. To the best of the …

Pseudo-Torch- A Rare Mutation Causing Global Development Delay, Microcephaly And Extensive Band Like Brain Calcification, Javeria Raza Alvi, Saher Gul Ahdi, Mahrukh Sultan, Tipu Sultan

Pakistan Journal of Neurological Sciences (PJNS)

Pseudo-TORCH 1 syndrome is an inherited autosomal recessive disorder that clinically and radiologically mimic congenital TORCH infection. We report a case of three and half years old child who presented with early infantile seizures, progressive microcephaly, facial dysmorphism and global developmental delay. There were symmetrical band like intra-parenchymal calcification as well as in pons and thalami. Serological testing for infectious agents was negative. His Whole exome sequencing revealed OCLN gene mutation consistent with Pseudo-TORCH syndrome-1.

A Rare Case Of Epilepsia Partialis Continua Secondary To Rasmussen’S Encephalitis, Waleed Shahzad, Muhammad Hassan, Haris Majid Rajput, Tehmina Inayat, Naveed Ullah Khan, Mazhar Badshah

Pakistan Journal of Neurological Sciences (PJNS)

Rasmussen's encephalitis is a rare baffling disorder seen in nearly 1 % to 2 % of epilepsy population and in 7.4% of paediatric population. It is mostly seen in children and in most cases seizures are seen during 14 months to 14 years with peak age 3 to 6 years. Etiology includes viral infections, humoral autoimmunity and T-cell mediated cyto-toxicity of the brain tissue. The main clinical features are intractable epilepsy, hemiparesis, hemidystonia, hemiathetosis, epilepsia-partialis-continua and mental decline. Imaging shows unilateral hemispheric brain atrophy. Here we describe a unique case of a 15-year-old Pakistani girl with severe immune mediated brain …

Guillain–Barré Syndrome In Sars-Cov-2; A Case Report, Naveed Ullah Khan, Muhammad Hassan, Haris Majid Rajput, Waleed Shahzad, Hafsa Mobeen, Mazhar Badshah

Pakistan Journal of Neurological Sciences (PJNS)

Multiple systems have been affected by COVID-19 infection, and neurological symptoms are not uncommon. A 45-year-old male presented to us in the emergency department without focal neurological deficits. He developed ascending paralysis soon after his admission, which was followed by worsening respiratory symptoms. The family of the patient refused a lumbar puncture, and his NCS/EMG showed features of acute motor axonal neuropathy (AMAN), a variant of Guillain-Barré syndrome (GBS). After being admitted on the 4th day, the patient developed type 2 respiratory failure and died on the 5th day of admission before any treatment could be started. Patients with COVID-19 …

An Exploration Of Effective Patient Education With An Emphasis On Concussion, Kayla M. Ruopp

Health, Human Performance and Recreation Undergraduate Honors Theses

Concussion is a prevalent healthcare issue in the US, with approximately 1.6-3.8 million sports and recreation-related concussions each year in all ages. A concussion can be defined as a traumatic brain injury caused by biomechanical forces. When an athlete sustains a concussion, a physiologic cascade of events occurs. The most common signs and symptoms of a concussion include: loss of balance, disorientation, headache and confusion. Concussion assessments are important in order to determine the presence of an impairment and there are a multitude of tests that clinicians can use in order to isolate each type of damage. Studies have shown …

A Rare Case Of Epilepsia Partialis Continua Secondary To Rasmussen’S Encephalitis, Waleed Shahzad, Muhammad Hassan, Haris Majid Rajput, Tehmina Inayat, Naveed Ullah Khan, Mazhar Badshah

Pakistan Journal of Neurological Sciences (PJNS)

Rasmussen's encephalitis is a rare baffling disorder seen in nearly 1 % to 2 % of epilepsy population and in 7.4% of paediatric population. It is mostly seen in children and in most cases seizures are seen during 14 months to 14 years with peak age 3 to 6 years. Etiology includes viral infections, humoral autoimmunity and T-cell mediated cyto-toxicity of the brain tissue. The main clinical features are intractable epilepsy, hemiparesis, hemidystonia, hemiathetosis, epilepsia-partialis-continua and mental decline. Imaging shows unilateral hemispheric brain atrophy. Here we describe a unique case of a 15-year-old Pakistani girl with severe immune mediated brain …

Neurological Syndromes After Recent Covid-19 Vaccination; A Possible Association, Ayisha Farooq Khan, Sajid Hameed, Sara Khan, Mohammad Wasay

Pakistan Journal of Neurological Sciences (PJNS)

ABSTRACT OBJECTIVE:

Coronavirus disease 2019 (COVID-19) pandemic is one of the deadliest pandemics of our time. Vaccines are our best hope to put an end to this pandemic. An emergency use authorization (EUA) has been given to seven vaccines and more than 4 billion doses have been globally administered. Because of EUA, the large-scale safety trials were not conducted before their use and adverse effects were one of the chief concerns resulting in vaccine hesitancy.

METHODS: This is a retrospective observational study. All the inpatients admitted to the Department of Neurology, Aga Khan University during the period from 1st April …

Improving Stroke Unit Numbers And Care In Pakistan, Abubakar Siddique, Umair Rashid Ch, Ahsan Numan

Pakistan Journal of Neurological Sciences (PJNS)

t is self-evident that stroke remains one of the leading causes of death and disability not only in the world but also in Pakistan. The prevalence of stroke risk factors and epidemiological studies shows that the burden of stroke will not decrease in the next decades and beyond. It poses a huge challenge for the affected and their families, for medical services, governments and the society as a whole. The promising thing about stroke is that it is preventable, treatable and manageable and there is potential to drastically reduce the burden of stroke and the long term consequences.1 However, this …