Neurology Commons^™

Wormian Bone Of The Orbit: A Case Report., Asad Rizvi, Joe Iwanaga, Rod J Oskouian, Marios Loukas, R Shane Tubbs

Articles, Abstracts, and Reports

Wormian bones are formed due to abnormal ossification centers in various locations in the skull. Genetic and/or environmental factors have been proposed to explain their formation. These bones can be normal anatomical variants or associated with a number of pathological conditions. The literature reports the most common locations of these bones as the cranial sutures, and reports of the presence of these bones in the orbit are rare. Clinically, these bones in the orbit can simulate fractures on imaging or can dislodge during surgery causing injury to the surrounding structures. Herein, we report a case of wormian bones of the …

Anatomical Study Of The Lingual Nerve And Inferior Alveolar Nerve In The Pterygomandibular Space: Complications Of The Inferior Alveolar Nerve Block., Joe Iwanaga, Paul J Choi, Marc Vetter, Mayank Patel, Shogo Kikuta, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

The inferior alveolar nerve block (IANB) procedure delivers anesthetics to the pterygomandibular space through which the lingual nerve (LN) and inferior alveolar nerve (IAN) travel. Injury to the LN has been reported more often than injury to the IAN. However, the number of anatomical studies of LN injury is limited. We aimed to establish evidence by investigating LN and IAN anatomy at the level of the mandibular foramen (MF). Forty-four sides from 22 Caucasian cadaveric heads (16 fresh-frozen and six formalin-fixed cadavers) were used in this study. The LN and IAN were laterally dissected, and the diameter and the distance …

Tendinous Inscriptions Of The Rectus Abdominis: A Comprehensive Review., Rabjot Rai, Lilian C Azih, Joe Iwanaga, Marios Loukas, Martin Mortazavi, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

The rectus abdominis muscles are interrupted by tendinous inscriptions, which typically appear as fibrous bands crossing the muscle. The current literature on tendinous inscriptions is scarce; hence, this review will provide a detailed overview of their anatomical description, including their variation, embryology, comparative anatomy, and clinical application. Understanding the anatomy and function of the tendinous inscription assists in providing clinical relevance and in guiding reconstructive surgeons in their surgical planning and design.

A Cadaveric Case Of A Circular Torcular Herophili., Sasha Lake, Juan J Altafulla, Joe Iwanaga, Rod J Oskouian, Marios Loukas, R Shane Tubbs

Articles, Abstracts, and Reports

The torcular Herophili is formed by the joining of the straight sinus, superior sagittal sinus, and transverse sinus. The anatomic configuration of the torcular Herophili is highly variable. In the current literature, classification systems define up to nine subtypes of the torcular Herophili. The frequency of prevalence of these anatomical variants is also variable. Herein is a case report of a circularly-shaped torcular Herophili found during cadaveric dissection.

Targeting The Mitochondrial Permeability Transition Pore In Traumatic Central Nervous System Injury, Joe E. Springer, Pareshkumar Prajapati, Patrick G. Sullivan

Spinal Cord and Brain Injury Research Center Faculty Publications

The mitochondrion serves many functions in the central nervous system (CNS) and other organs beyond the well-recognized role of adenosine triphosphate (ATP) production. This includes calcium-dependent cell signaling, regulation of gene expression, synthesis and release of cytotoxic reactive oxygen species, and the release of cytochrome c and other apoptotic cell death factors. Traumatic injury to the CNS results in a rapid and, in some cases, sustained loss of mitochondrial function. One consequence of compromised mitochondrial function is induction of the mitochondrial permeability transition (mPT) state due to formation of the cyclosporine A sensitive permeability transition pore (mPTP). In this mini-review, …

Quality Of Life Among Patients Undergoing Decompressive Craniectomy For Traumatic Brain Injury Using Glasgow Outcome Scale Extended And Quality Of Life After Brain Injury Scale, Muhammad Waqas, Noor Malik, Muhammad Shahzad Shamim, Karim Rizwan Nathani, Sumia Andleeb Abbasi

Section of Neurosurgery

Objective: To assess quality of life of patients who underwent decompressive craniectomy (DC) for traumatic brain injury and satisfaction of caregivers with outcomes.
Methods: This cross-sectional study was conducted at a tertiary care urban center in Pakistan. All patients with severe traumatic brain injury who underwent DC and survived >6 months were included. Outcomes were assessed using 2 scales: Glasgow Outcome Scale Extended and Quality of Life After Traumatic Brain Injury (QOLIBRI). The proforma was translated and validated into the national language. Patient caregivers were interviewed to ask if they would opt for DC in a similar situation in future. …

Biological Characteristics And Outcomes Of Gliosarcoma, Fauzan Alam Hashmi, Adnan Salim, Muhammad Shahzad Shamim, Muhammad Ehsan Bari

Section of Neurosurgery

Gliosarcoma is a highly aggressive primary brain tumour. It is a relatively rare tumour and comprises of two histological components, glial and sarcomatous. Gliosarcomas carry a poorer prognosis than that of Glioblastoma Multiforme (GBM). The current review highlights important histological and radiological features of gliosarcoma in the light of recent literature, and also touches upon the treatment options and outcomes of various types of gliosarcoma.

Value Of Routine Preoperative Tests For Coagulation Before Elective Cranial Surgery. Results Of An Institutional Audit And A Nationwide Survey Of Neurosurgical Centers In Pakistan, Naveed Zaman, Muhammad Bilal Tariq, Saad Akhtar, Sidra Sattar, Wajeeha Tariq, Muhammad Shahzad Shamim, Samie Asghar

Section of Neurosurgery

Background: Routine preoperative blood testing has become a dogma. The general practice is to order preoperative workup as a knee-jerk response rather than individualize it for each patient. The fact that the bleeding brain tends to swell, which coupled with limited options for proximal control, packing, and overall hemostasis, leads to an overemphasis on the preoperative coagulation profile.
Material and methods: This is a retrospective review of the medical records of patients admitted at Aga Khan University Hospital from January 2010 to December 2015 for an elective craniotomy. The hospital registry was used to identify files for review. Data were …

Development Of Criteria Highly Suggestive Of Spinal Tuberculosis, Gohar Javed, Altaf Ali Laghari, Syed Ijlal Ahmed, Sarosh Madhani, Ahmed Ali Shah, Faizuddin Najmuddin, Reehana Khawaja

Section of Neurosurgery

Background: In a developing country there is a need for development of criteria that can be used for the diagnosis of spinal tuberculosis, which is common in that region.
Methods: Demographic, clinical, and radiologic features of spinal tuberculosis and spinal epidural tumors have been compared statistically, and inferences have been drawn in terms of P values, sensitivity, specificity, positive predictive values, and negative predictive values.
Results: A statistically significant relationship was found between spinal tuberculosis and spinal pain, fever, gradually progressive lower limb weakness, contrast-enhancing epidural ± paravertebral lesions, continuous levels affected, spinal deformity, and raised erythrocyte sedimentation rate.
Conclusions: …

Is There An Optimal Wound Closure Technique For Major Posterior Spine Surgery? A Systematic Review., Emre Yilmaz, Ronen Blecher, Marc Moisi, Chandra Ankush, Thomas M O'Lynnger, Amir Abdul-Jabbar, Joseph R Dettori, Rod J Oskouian

Articles, Abstracts, and Reports

Study Design: Systematic review.

Objectives: In patients undergoing posterior spinal fusion: (1) What are the types and risks of wound complications in major (≥3 levels) surgery, and does the risk vary by number of levels fused? (2) What types of fascial closure result in the fewest wound complications? (3) What subcutaneous closure technique is more effective in preventing wound complications for obese patients (body mass index >30 kg/m

Methods: Electronic databases and reference lists of key articles were searched from January 1, 2000 to December 4, 2017 to identify studies meeting inclusion criteria.

Results: Six lower quality retrospective studies (evidence …

Review Of Karyotypic Data From Low Grade Glial Brain Tumors, Specifically Pilocytic Astrocytomas, And Correlation Of Genetic Aberrations With Tumor Recurrence., Linda D. Cooley, Scott C. Smith, Lisa Warren, Melissa Gener, Kevin Ginn, John Herriges

Posters

Abstract: Brain tumors are the most common solid tumor of childhood. Approximately 50% of pediatric CNS tumors are low grade gliomas (WHO grade I or II) and Pilocytic astrocytoma (PA) is the most common accounting for 33% of all gliomas in children 0-14 years and ~18% of all childhood brain tumors. Prognosis with this slow-growing tumor is excellent; 10 year overall survival of ~95%. However, event free survival averages ~50%. Patient age and extent of tumor resection are key prognostic factors; tumor location and size impact resection and outcome. Histopathological features indicate PA is a benign tumor and rarely are …

Enhanced Co-Registration Methods To Improve Intracranial Electrode Contact Localization., Walter A. Hinds, Amrit Misra, Michael R. Sperling, Ashwini Sharan, Joseph I. Tracy, Karen A. Moxon

Department of Neurology Faculty Papers

Background: Electrode contact locations are important when planning tailored brain surgeries to identify pathological tissue targeted for resection and conversely avoid eloquent tissue. Current methods employ trained experts to use neuroimaging scans that are manually co-registered and localize contacts within ~2 mm. Yet, the state of the art is limited by either the expertise needed for each type of intracranial electrode or the inter-modality co-registration which increases error, reducing accuracy. Patients often have a variety of strips, grids and depths implanted; therefore, it is cumbersome and time-consuming to apply separate localization methods for each type of electrode, requiring expertise across …

Dietary Inclusion Of Enriched Chicken Bone Broth Prevents Trigeminal Sensitization Meditated By Early Life Stress, Orion Peterson

MSU Graduate Theses

Early life stress is considered a risk factor for development of migraine, which is a prevalent painful neurological disorder involving sensitization and activation of trigeminal neurons, and irritable bowel syndrome, a condition often comorbid with chronic migraine. The focus of my study was to determine the effects of early life stress and dietary inclusion of enriched chicken bone broth on trigeminal nociceptor sensitization and the gut microbiota. Adult Sprague-Dawley male “sender” rats subjected to primary traumatic stress were placed next to breeding or pregnant female rats that served as “receiver” rats (secondary traumatic stress) and in proximity to the offspring …

Cardiac Autonomic Neuropathy In Diabetes: A Predictor Of Cardiometabolic Events, Aaron I. Vinik, Carolina Casellini, Henri K. Parson, Sheri R. Colberg, Marie-Laure Nevoret

Human Movement Sciences & Special Education Faculty Publications

Autonomic nervous system (ANS) imbalance manifesting as cardiac autonomic neuropathy in the diabetic population is an important predictor of cardiovascular events. Symptoms and signs of ANS dysfunction, such as resting heart rate elevations, diminished blood pressure responses to standing, and altered time and frequency domain measures of heart rate variability in response to deep breathing, standing, and the Valsalva maneuver, should be elicited from all patients with diabetes and prediabetes. With the recognition of the presence of ANS imbalance or for its prevention, a rigorous regime should be implemented with lifestyle modification, physical activity, and cautious use of medications that …

Evidence-Based Medicine, Media, And Manipulation., Jens R Chapman, Karsten Wiechert, Jeffrey C Wang

Articles, Abstracts, and Reports

No abstract provided.

The Tentorium Cerebelli: A Comprehensive Review Including Its Anatomy, Embryology, And Surgical Techniques., Rabjot Rai, Joe Iwanaga, Gaffar Shokouhi, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

The tentorium cerebelli functions as a partition, dispelling the burden of weight from supratentorial structures upon inferior brain matter. Clinicians and neurosurgeons, when assessing pathological findings, should have knowledge regarding the tentorium cerebelli anatomy. This work of literature is a comprehensive review of the tentorium cerebelli, including its anatomy, embryology, and clinical and surgical implications. The evolutionary pattern demonstrates sequential stages to higher mammalian lineage. An understanding of the complexity of the neurovascular structures and the anatomy of the tentorium cerebelli is crucial for surgical procedures by neurosurgeons.

Nonketotic Hyperglycemia Induced Occipital Lobe Seizures: A Case Report, Samantha Richardson, Sona K. Shah

Marshall Journal of Medicine

Typically, nonketotic hyperglycemia induces partial motor seizures. We present a rare case of nonketotic hyperglycemia induced occipital lobe seizures and discuss the impact of hemoglobin A1c on seizure activity, typical imaging results, and use of anti epileptic drugs in management.

The Incisive Canal: A Comprehensive Review., Sasha Lake, Joe Iwanaga, Shogo Kikuta, Rod J Oskouian, Marios Loukas, R Shane Tubbs

Articles, Abstracts, and Reports

The incisive canal, also known as the nasopalatine canal, is an interosseous conduit through the anterior maxilla connecting the oral and nasal cavities. Within this canal lies the nasopalatine nerve and the vascular anastomosis between the greater palatine and sphenopalatine arteries. The embryology of the canal has led to interesting theories explaining its function. Efforts have been made to describe the morphometrics of the incisive canal by radiologic evaluation across sex and ethnicities. This paper aims to review the current literature on the embryology, anatomy, and clinical relevance of the incisive canal.

Fibroblasts As A Practical Alternative To Mesenchymal Stem Cells., Thomas E Ichim, Pete O'Heeron, Santosh Kesari

Articles, Abstracts, and Reports

Mesenchymal stem cell (MSC) therapy offers great potential for treatment of disease through the multifunctional and responsive ability of these cells. In numerous contexts, MSC have been shown to reduce inflammation, modulate immune responses, and provide trophic factor support for regeneration. While the most commonly used MSC source, the bone marrow provides relatively little starting material for cellular expansion, and requires invasive extraction means, fibroblasts are easily harvested in large numbers from various biological wastes. Additionally, in vitro expansion of fibroblasts is significantly easier given the robustness of these cells in tissue culture and shorter doubling time compared to typical …

Predicting Gains With Visuospatial Training After Stroke Using An Eeg Measure Of Frontoparietal Circuit Function, Robert J. Zhou, Hossein M. Hondori, Maryam Khademi, Jessica M. Cassidy, Katherine M. Wu, Derek Z. Yang, Nikhita Kathuria, Fareshte R. Erani, Lucy Dodakian, Alison Mckenzie, Cristina V. Lopes, Walt Scacchi, Ramesh Srinivasan, Steven C. Cramer

Physical Therapy Faculty Articles and Research

The heterogeneity of stroke prompts the need for predictors of individual treatment response to rehabilitation therapies. We previously studied healthy subjects with EEG and identified a frontoparietal circuit in which activity predicted training-related gains in visuomotor tracking. Here we asked whether activity in this same frontoparietal circuit also predicts training-related gains in visuomotor tracking in patients with chronic hemiparetic stroke. Subjects (n = 12) underwent dense-array EEG recording at rest, then received 8 sessions of visuomotor tracking training delivered via home-based telehealth methods. Subjects showed significant training-related gains in the primary behavioral endpoint, Success Rate score on a standardized test …