Allyson Alexander

ORCID: 0000-0003-4928-3921
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About
Contact & Profiles
Research Areas
  • Epilepsy research and treatment
  • Neuroscience and Neuropharmacology Research
  • Cleft Lip and Palate Research
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Craniofacial Disorders and Treatments
  • Neurological disorders and treatments
  • Cerebrospinal fluid and hydrocephalus
  • Pharmacological Effects and Toxicity Studies
  • Photoreceptor and optogenetics research
  • Carcinogens and Genotoxicity Assessment
  • Glioma Diagnosis and Treatment
  • Vagus Nerve Stimulation Research
  • Neural dynamics and brain function
  • Genomics and Rare Diseases
  • Neuroscience and Neural Engineering
  • Memory and Neural Mechanisms
  • History of Medical Practice
  • Genetics and Neurodevelopmental Disorders
  • Neonatal and fetal brain pathology
  • Sleep and Wakefulness Research
  • Global Health and Surgery
  • Telemedicine and Telehealth Implementation
  • Spinal Dysraphism and Malformations
  • Neurological and metabolic disorders
  • Infectious Encephalopathies and Encephalitis

Children's Hospital Colorado
2019-2025

University of Colorado Denver
2017-2025

University of Colorado Anschutz Medical Campus
2019-2025

University of Colorado System
2024

University of Colorado Colorado Springs
2023

Creative Commons
2023

S.P.E.C.I.E.S.
2019

Center for Children
2019

Stanford University
2011-2017

Krasnoyarsk State Medical University
2011

Abstract Post-zygotically acquired genetic variants, or somatic that arise during cortical development have emerged as important causes of focal epilepsies, particularly those due to malformations development. Pathogenic variants been identified in many genes within the PI3K-AKT-mTOR-signalling pathway individuals with hemimegalencephaly and dysplasia (type II), more recently SLC35A2 I) non-dysplastic epileptic cortex. Given expanding role across different brain malformations, we sought...

10.1093/brain/awac117 article EN Brain 2022-03-24

Abstract Neuromodulation via Responsive Neurostimulation (RNS) or Deep Brain Stimulation (DBS) is an emerging treatment strategy for pediatric drug‐resistant epilepsy (DRE). Knowledge gaps exist in patient selection, surgical technique, and perioperative care. Here, we use expert survey to clarify practices. Thirty‐two members of the Pediatric Epilepsy Research Consortium were surveyed using REDCap. Respondents from 17 centers (missing data one): Four implant RNS only while 13 both DBS....

10.1002/epi4.12902 article EN cc-by-nc-nd Epilepsia Open 2024-02-29

Abstract BACKGROUND Despite the well-documented utility of responsive neurostimulation (RNS, NeuroPace) in adult epilepsy patients, literature on use RNS children is limited. OBJECTIVE To determine real-world efficacy and safety pediatric patients. METHODS Patients with childhood-onset drug-resistant treated were retrospectively identified at 5 centers. Reduction disabling seizures complications evaluated for (<18 yr) young adults (>18 compared prior pertaining to RESULTS Of 35...

10.1093/neuros/nyab343 article EN Neurosurgery 2021-08-20

In the not too distant future, humankind will embark on one of its greatest adventures, travel to planets. However, deep space is associated with an inevitable exposure radiation fields. Space-relevant doses protons elicit persistent disruptions in cognition and neuronal structure. whether space-relevant irradiation alters neurotransmission unknown. Within hippocampus, a brain region crucial for cognition, perisomatic inhibitory control pyramidal cells (PCs) supplied by two distinct cell...

10.1007/s00429-016-1345-3 article EN cc-by Brain Structure and Function 2016-11-30

Epilepsy is common, occurring in 0.5-1.5% of the pediatric US population, with drug-resistant epilepsy (DRE) nearly one-third persons under 18 years age.1,2,3,50 The International League Against (ILAE) defines DRE as "failure adequate trials two tolerated, appropriately chosen and used, antiepileptic drug schedules to achieve sustained seizure freedom".4 After anti-seizure medications (ASMs) have failed, likelihood that an additional ASM will lead freedom around 4-5%.

10.1016/j.pediatrneurol.2024.04.028 article EN cc-by Pediatric Neurology 2024-05-06

OBJECTIVE Patients with a history of surgery for single-suture craniosynostosis (SSC) as an infant often wish to participate in sports later childhood. However, there are no established guidelines from neurosurgeons and craniofacial surgeons guide parents which their child should or not participate. Therefore, this study aimed evaluate the attitudes practice patterns experienced regarding counseling caregivers these patients about participation. METHODS A survey was administered plastic...

10.3171/2024.10.focus24569 article EN Neurosurgical FOCUS 2025-01-01

INTRODUCTION: Epilepsy affects up to 0.5% of children, with one-third considered for surgery due medical refractoriness. Studies show offers better seizure freedom drug-resistant epilepsy than therapy. However, it is underutilized potential complications and postoperative deficits, which have improved over time. This study evaluates the indications MRgLITT compared resective procedures assesses perioperative variables, including outcomes, in pediatric patients undergoing MRgLITT. We report...

10.1227/neu.0000000000003360_1159 article EN Neurosurgery 2025-03-14

Despite the clinical importance of identifying increased intracranial pressure (IIP) in children with craniosynostosis (CS), its presence is often uncertain due to limited utilization invasive measurement methods, inconclusive evaluations, and variability depending on CS phenotype. Hence, prevalence reports are highly variable. We previously developed a computational method identify pediatric chronic IIP diverse etiology based subtle cranial thickness density anomalies quantified from...

10.1097/gox.0000000000006618 article EN cc-by-nc-nd Plastic & Reconstructive Surgery Global Open 2025-03-01

Childhood epilepsy is a common and devastating condition, for which many children still do not have adequate treatment. Some with drug-resistant require surgical excision of epileptogenic brain tissue seizure control, affording the opportunity to study this ex vivo interrogate human epileptic neurons potentially hyperexcitable perturbations in intrinsic electrophysiological properties. In study, we characterized diversity layer L2/3 (L2/3) pyramidal (PNs) slices from pediatric patients...

10.1523/eneuro.0247-24.2025 article EN cc-by-nc-sa eNeuro 2025-04-17

Drug-resistant epilepsy (DRE) occurs at higher rates in children <3 years old. Epilepsy surgery is effective, but rarely utilized young despite developmental benefits of early seizure freedom. The present study aims to identify unique patient characteristics and evaluation strategies old who undergo as a means assess contributors potential solutions health care disparities this group.The Pediatric Research Consortium Surgery Database, multicentered, cross-sectional collaboration 21 US...

10.1111/epi.17124 article EN Epilepsia 2021-11-15

Abstract Objectives Corpus callosotomy (CC) is used to reduce seizures, primarily in patients with generalized drug‐resistant epilepsy (DRE). The invasive nature of the procedure contributes underutilization despite its potential superiority other palliative procedures. goal this study was use a multi‐institutional surgery database characterize CC across participating centers. Methods Data were acquired from Pediatric Epilepsy Research Consortium (PERC) Surgery Database, prospective...

10.1111/epi.17853 article EN Epilepsia 2023-12-08

The unpredictability and severity of seizures contribute to the debilitating nature epilepsy. These factors also render condition particularly challenging treat, as an ideal treatment would need detect halt pathological bursts hyperactivity without disrupting normal brain activity. Optogenetic techniques offer promising tools study perhaps eventually treat this episodic disorder by controlling specific circuits in epileptic animals with great temporal precision. Here, we briefly review...

10.1177/1073858415619600 article EN The Neuroscientist 2015-12-24

BACKGROUND Pediatric cervical spine injuries (CSI) are rare but potentially devastating sequelae of blunt trauma. Existing protocols to evaluate children at risk for CSI frequently incorporate computed topography (CT) and magnetic resonance imaging (MRI); however, the clinical value performing both remains unclear. METHODS Single-center retrospective review pediatric trauma patients who underwent CT MRI between 2001 2015. Based on radiographic findings, results were grouped into one three...

10.1097/ta.0000000000002487 article EN Journal of Trauma and Acute Care Surgery 2019-08-17

Stereotactic electroencephalography (SEEG) is an increasingly common technique that neurosurgeons use to help identify the epileptogenic zone. The anchor bolt, which typically secures electrode skull, can be problematic in very thin bone or electrodes placed occiput.

10.3171/2020.7.peds20403 article EN Journal of Neurosurgery Pediatrics 2020-12-18

Fragile X Syndrome (FXS) is a neurodevelopmental disorder instigated by the absence of key translation regulating protein, Mental Retardation Protein (FMRP). The loss FMRP in CNS leads to abnormal synaptic development, disruption critical periods plasticity, and an overall deficiency proper sensory circuit coding leading hyperexcitable networks. However, little known about how this environment affects inhibitory plasticity. Here, we show that vivo layer 2/3 primary somatosensory cortex Fmr1...

10.1016/j.nbd.2020.104959 article EN cc-by-nc-nd Neurobiology of Disease 2020-06-06

Temporal lobe epilepsy (TLE) is often associated with memory deficits. Reactivation of traces in the hippocampus occurs during sharp-wave ripples (SWRs; 140-250 Hz). To better understand mechanisms underlying high-frequency oscillations and cognitive comorbidities epilepsy, we evaluated how rigorously identified deep CA1 pyramidal cells (dPCs) discharge SWRs control TLE mice.We used unilateral intraamygdala kainate model video-electroencephalography (EEG) verified chronically epileptic adult...

10.1002/epi4.12310 article EN cc-by-nc-nd Epilepsia Open 2019-02-08
Michael C. Dewan Albert M. Isaacs Michael J. Cools Aaron M. Yengo‐Kahn Robert P. Naftel and 88 more Hailey Jensen Ron Reeder Richard Holubkov Joseline Haizel‐Cobbina Jay Riva-Cambrin Ryan Jafrani Jonathan Pindrik Eric M. Jackson Brendan F. Judy Elena Kurudza Ian F. Pollack Michael M. McDowell Todd C. Hankinson Susan Staulcup Jason S. Hauptman Koko Hall Mandeep S. Tamber Alex Cheong Nebras M. Warsi Brandon G. Rocque Benjamin W. Saccomano Rita Snyder Abhaya V. Kulkarni John R. W. Kestle John C. Wellons Douglas L. Brockmeyer Morgan Walker Robert J. Bollo Samuel Cheshier Rajiv R. Iyer Jeffrey P. Blount Jane M. Johnston Brandon G. Rocque Leslie Acakpo‐Satchivi W. Jerry Oakes Peter B. Dirks George M. Ibrahim James T. Rutka Michael D. Taylor Daniel J. Curry Guillermo Aldave Thomas Dauser Andrew Jea Sandi Lam Howard Weiner Thomas G. Luerssen Richard G. Ellenbogen Jeffrey G. Ojemann A. Lee A. Avellino Stephanie Greene Michael M. McDowell Elizabeth C. Tyler‐Kabara Robert J. Kellogg T. Abel T. S. Park Jennifer M. Strahle Joseph T. Roland Sean D. McEvoy Matthew D. Smyth N. Tulipan Faizal Haji Ash Singhal Paul Steinbok D. Douglas Cochrane Walter Hader Carla J. Gallagher M. Benour P. Chiarelli Scott Durham Erin N. Kiehna J. Gordon McComb A. Robison Allyson Alexander Michael H. Handler Blair J. O’Neill C. Wilkinson Lance S. Governale Annie Drapeau Julie C. Leonard Eric A. Sribnick A. Shaikhouni Esther Ahn Alan R. Cohen Morris D. Groves Sonya Robinson Christopher M. Bonfield Chevis N. Shannon

10.1007/s11060-023-04316-4 article EN Journal of Neuro-Oncology 2023-05-01
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