Karen Tawk

Dr. Karen Tawk

orcid

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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19 July 2023 in Audiology Research
Verified
Journal Article
Open access
PDF file
KUKayla K. Umemoto
Kayla K. Umemoto
KTKaren Tawk
Karen Tawk
NMNajva Mazhari
Najva Mazhari
Mehdi AbouzariMehdi Abouzari
Mehdi Abouzari
HAMID REZA MD DJALILIANHAMID REZA MD DJALILIAN
HAMID REZA MD DJALILIAN
Migraine is a chronic neurological disorder that frequently coexists with different vestibular and cochlear symptoms (sudden hearing loss, tinnitus, otalgia, aural fullness, hyperacusis, dizziness, imbalance, and vertigo) and disorders (recurrent benign positional vertigo, persistent postural perceptual dizziness, mal de debarquement, and Menière’s disease). Despite evidence of an epidemiological association and similar pathophysiology between migraine and these vestibulocochlear disorders, patients suffering from migraine-related symptoms are usually underdiagnosed and undertreated. Current migraine treatment options have shown success in treating vestibulocochlear symptoms. Lifestyle and dietary modifications (reducing stress, restful sleep, avoiding migraine dietary triggers, and avoiding starvation and dehydration) and supplements (vitamin B2 and magnesium) offer effective first-line treatments. Treatment with migraine prophylactic medications such as tricyclic antidepressants (e.g., nortriptyline), anticonvulsants (e.g., topiramate), and calcium channel blockers (e.g., verapamil) is implemented when lifestyle and dietary modifications are not sufficient in improving a patient’s symptoms. We have included an algorithm that outlines a suggested approach for addressing these symptoms, taking into account our clinical observations. Greater recognition and understanding of migraine and its related vestibular and cochlear symptoms are needed to ensure the appropriate diagnosis and treatment of affected patients.

Verified
Journal Article
Open access
PDF file
NZNader Ghassan Zalaquett
Nader Ghassan Zalaquett
ESElio Salameh
Elio Salameh
JKJonathan Myungho Kim
Jonathan Myungho Kim
EGElham Ghanbarian
Elham Ghanbarian
KTKaren Tawk
Karen Tawk
Mehdi AbouzariMehdi Abouzari
Mehdi Abouzari
Background: Migraine is a prevalent episodic brain disorder known for recurrent attacks of unilateral headaches, accompanied by complaints of photophobia, phonophobia, nausea, and vomiting. Two main categories of migraine are migraine with aura (MA) and migraine without aura (MO). Main body: Early twin and population studies have shown a genetic basis for these disorders, and efforts have been invested since to discern the genes involved. Many techniques, including candidate-gene association studies, loci linkage studies, genome-wide association, and transcription studies, have been used for this goal. As a result, several genes were pinned with concurrent and conflicting data among studies. It is important to understand the evolution of techniques and their findings. Conclusions: This review provides a chronological understanding of the different techniques used from the dawn of migraine genetic investigations and the genes linked with the migraine subtypes.

27 May 2024 in Diagnostics
Verified
Journal Article
Open access
PDF file
Mehdi AbouzariMehdi Abouzari
Mehdi Abouzari
AAArash Abiri
Arash Abiri
KTKaren Tawk
Karen Tawk
CTCynthia Tsang
Cynthia Tsang
BPBeenish Patel
Beenish Patel
HAMID REZA MD DJALILIANHAMID REZA MD DJALILIAN
HAMID REZA MD DJALILIAN
Objective: To compare white matter hyperintensities (WMHs) on T2-weighted magnetic resonance imaging (MRI) of patients with sudden sensorineural hearing loss (SSNHL) and analyze subpopulations with age-matched controls. Methods: T2-weighted MRI scans of 150 patients with SSNHL were assessed for WMHs and compared with the data of 148 healthy age-matched adults. Assessments of WMHs included independent grading of deep white matter hyperintensities (DWMHs) and periventricular hyperintensities (PVHs). WMH severity was visually rated using the Fazekas and Mirsen scales by two independent observers. Results: Fazekas grades for PVHs (p < 0.001) and DWMHs (p < 0.001) of SSNHL patients were found to be significantly greater than those of healthy participants. The average Mirsen grades for DWMHs of healthy and SSNHL patients were evaluated to be 0.373 ± 0.550 and 2.140 ± 0.859, respectively. Mirsen grades for DWMHs of SSNHL patients were found to be significantly greater (p < 0.001) than those of healthy participants. The Mirsen scale was found to have higher sensitivity (p < 0.001) than the Fazekas scale in grading PVHs and DWMHs. No significant difference (p = 0.24) was found in specificities between the two scales. Conclusions: Patients with sudden hearing loss have a much higher likelihood of having periventricular and deep white matter hyperintensities compared to age-matched controls. These findings indicate that sudden hearing loss patients are more likely to have microvascular changes in the brain, which may indicate a vascular and/or migraine origin to sudden sensorineural hearing loss.

7 February 2024 in Audiology Research
Verified
Journal Article
Open access
PDF file
NMNajva Mazhari
Najva Mazhari
KTKaren Tawk
Karen Tawk
KUKayla K. Umemoto
Kayla K. Umemoto
Mehdi AbouzariMehdi Abouzari
Mehdi Abouzari
HAMID REZA MD DJALILIANHAMID REZA MD DJALILIAN
HAMID REZA MD DJALILIAN
We thank the authors for their insightful and thoughtful commentary on our recent publication

25 February 2026 in Brain Sciences
Verified
Journal Article
Open access
PDF file
GKGhaidaa Khlaifat
Ghaidaa Khlaifat
KTKaren Tawk
Karen Tawk
ELElla J. Lee
Ella J. Lee
KBKhushi Bhatt
Khushi Bhatt
Mehdi AbouzariMehdi Abouzari
Mehdi Abouzari
HAMID REZA MD DJALILIANHAMID REZA MD DJALILIAN
HAMID REZA MD DJALILIAN
Objective: To propose that migraine-related symptoms such as dizziness, sudden hearing loss, tinnitus, and vertigo—when occurring without headache—should be recognized as manifestations of central sensitivity syndrome (CSS), and to explore the implications of this reclassification for clinical practice and patient care. Data sources: PubMed Central and Google Scholar. Review methods: A search of the literature was performed using PubMed and Google Scholar. Search terms included combinations of keywords such as “migraine”, “vertigo”, “tinnitus”, “dizziness”, “sudden hearing loss”, “central sensitivity syndrome”, and “central sensitization”. Conclusions: Non-headache migraine symptoms show significant overlap with characteristics of CSS, including central nervous system hyperexcitability and dysregulation. Neuroimaging and clinical data support this connection, suggesting these symptoms may be better understood within the CSS framework. Recognizing this association could represent a conceptual shift in how such symptoms are classified and managed. Implications for practice: Incorporating non-headache migraine symptoms into the CSS paradigm may lead to earlier recognition, reduce misdiagnosis and stigma, and support the development of more effective, targeted therapeutic strategies for affected patients.