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Hearing Disorders: HELP
Articles by Michael C. Schubert
Based on 5 articles published since 2009
(Why 5 articles?)

Between 2009 and 2019, Michael Schubert wrote the following 5 articles about Hearing Disorders.
+ Citations + Abstracts
1 Review Habilitation of auditory and vestibular dysfunction. 2012

Snapp, Hillary A / Schubert, Michael C. ·Department of Otolaryngology, University of Miami, 1120 Northwest 14th Street, Fifth Floor, Miami, FL 33136, USA. ·Otolaryngol Clin North Am · Pubmed #22483829.

ABSTRACT: Although unilateral hearing loss is often the initial sign of vestibular schwannoma (VS), the pathogenesis of the associated structures within the cerebellopontine angle can result in vestibular, facial, or vascular symptoms. Removal of a VS causes deficits in hearing, balance, and gaze stability. The resulting hearing loss eliminates the benefits of binaural listening that provide localization, loudness summation, and listening-in-noise ability. Reduced balance and gaze stability increase fall risk. This review discusses modern treatment options for auditory and vestibular rehabilitation including contralateral routing of signals (CROS), bilateral CROS, bone-anchored implants, tinnitus management, gaze and gait stability exercises.

2 Article Bilateral Hearing and Vestibular Loss in a Patient With Untreated Chronic Myeloid Leukemia. 2017

Tang, Liyang / Schubert, Michael / Marlowe, Andrea / Weinreich, Heather. ·Department of Otolaryngology, Johns Hopkins School of Medicine, Baltimore, Maryland. · Department of Otolaryngology, Johns Hopkins School of Medicine, Baltimore, Maryland2Department of Physical Medicine and Rehabilitation, Johns Hopkins School of Medicine, Baltimore, Maryland. ·JAMA Otolaryngol Head Neck Surg · Pubmed #28542688.

ABSTRACT: -- No abstract --

3 Article Association between hearing loss and saccular dysfunction in older individuals. 2012

Zuniga, Maria Geraldine / Dinkes, Roni E / Davalos-Bichara, Marcela / Carey, John P / Schubert, Michael C / King, W Michael / Walston, Jeremy / Agrawal, Yuri. ·Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA. ·Otol Neurotol · Pubmed #23064383.

ABSTRACT: OBJECTIVE: 1) Describe the association between hearing loss and dysfunction of each of the 5 vestibular end-organs--the horizontal, superior, and posterior semicircular canals; saccule; and utricle--in older individuals. 2) Evaluate whether hearing loss and vestibular end-organ deficits share any risk factors. STUDY DESIGN: Cross-sectional study. SETTING: Academic medical center. PATIENTS: Fifty-one individuals age 70 years or older. INTERVENTIONS: Audiometry, head-thrust dynamic visual acuity (htDVA), sound-evoked cervical vestibular-evoked myogenic potential (cVEMP), and tap-evoked ocular VEMP (oVEMP). MAIN OUTCOME MEASURES: Audiometric pure-tone averages (PTA), htDVA LogMAR scores as a measure of semicircular canal function in each canal plane, and cVEMP and oVEMP amplitudes as a measure of saccular and utricular function, respectively. RESULTS: We observed a significant correlation between hearing loss at high frequencies and reduced cVEMP amplitudes (or reduced saccular function; r = -0.37, p < 0.0001) in subjects age 70 years or older. In contrast, hearing loss was not associated with oVEMP amplitudes (or utricular function), or htDVA LogMAR scores (or semicircular canal function) in any of the canal planes. Age and noise exposure were significantly associated with measures of both cochlear and saccular dysfunction. CONCLUSION: The concomitant decline in the cochlear and saccular function associated with aging may reflect their common embryologic origin in the pars inferior of the labyrinth. Noise exposure seems to be related to both saccular and cochlear dysfunction. These findings suggest a potential benefit of screening individuals with presbycusis-particularly those with significant noise exposure history-for saccular dysfunction, which may contribute to fall risk in the elderly.

4 Article Balance dysfunction and recovery after surgery for superior canal dehiscence syndrome. 2012

Janky, Kristen L / Zuniga, M Geraldine / Carey, John P / Schubert, Michael. ·Johns Hopkins University, 601 N Caroline Street, Baltimore, MD 21287-0910, USA. ·Arch Otolaryngol Head Neck Surg · Pubmed #22801722.

ABSTRACT: OBJECTIVE: To characterize (1) the impairment and recovery of functional balance and (2) the extent of vestibular dysfunction and physiological compensation following superior canal dehiscence syndrome (SCDS) surgical repair. DESIGN: Prospective study. SETTING: Tertiary referral center. PARTICIPANTS: Thirty patients diagnosed as having SCDS. INTERVENTIONS: Surgical plugging and resurfacing of SCDS. MAIN OUTCOME MEASURES: Balance measures were assessed in 3 separate groups, each with 10 different patients: presurgery, postoperative short-term (<1 week), and postoperative long-term (≥6 weeks). Vestibular compensation and function, including qualitative head impulse tests (HITs) in all canal planes and audiometric measures, were assessed in a subgroup of 10 patients in both the postoperative short-term and long-term phases. RESULTS: Balance measures were significantly impaired immediately but not 6 weeks after SCDS repair. All patients demonstrated deficient vestibulo-ocular reflexes for HITs in the plane of the superior canal following surgical repair. Unexpectedly, spontaneous or post-head-shaking nystagmus beat ipsilesionally in most patients, whereas contrabeating nystagmus was noted only in patients with complete canal paresis (ie, positive HITs in all canal planes). There were no significant deviations in subjective visual vertical following surgical repair (P = .37). The degree of audiometric air-bone gap normalized 6 weeks after surgery. CONCLUSIONS: All patients undergoing SCDS repair should undergo a postoperative fall risk assessment. Nystagmus direction (spontaneous and post-head-shaking) seems to be a good indicator of the degree of peripheral vestibular system involvement and central compensation. These measures correlate well with the HIT.

5 Article Second-side surgery in superior canal dehiscence syndrome. 2012

Agrawal, Yuri / Minor, Lloyd B / Schubert, Michael C / Janky, Kristen L / Davalos-Bichara, Marcela / Carey, John P. ·Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA. ·Otol Neurotol · Pubmed #22158019.

ABSTRACT: OBJECTIVE: Bilateral superior canal (SC) dehiscence syndrome poses a challenge because bilateral SC dehiscence (SCD) plugging might be expected to result in oscillopsia and disability. Our aims were as follows: 1) to evaluate which symptoms prompted patients with bilateral SCD syndrome (SCDS) to seek second-side surgery, and 2) to determine the prevalence of disabling imbalance and oscillopsia after bilateral SC plugging. STUDY DESIGN: Prospective observational study. SETTING: Tertiary referral center. PATIENTS: Five patients with bilateral SCDS based on history, audiometric and physiologic testing, and computed tomographic findings. This includes all of our patients who have had second-side plugging surgery to date. INTERVENTION(S): Bilateral sequential middle fossa craniotomy and plugging of SCs. MAIN OUTCOME MEASURE(S): Cochleovestibular symptoms, cervical and ocular vestibular-evoked myogenic potential testing, dizziness handicap inventory, short-form 36 Health Survey, dynamic visual acuity testing. RESULTS: The most common symptoms prompting second-side surgery were sound- and pressure-induced vertigo and autophony. Three of the 5 patients reported that symptoms shifted to the contralateral ear immediately after plugging the first side, whereas in 2 patients, contralateral symptoms developed several years after the first SC plugging. Two of 4 patients experienced ongoing oscillopsia after bilateral SCDS surgery; however, all patients reported relief from their SCD symptoms and were glad that they had pursued bilateral surgery. CONCLUSION: In patients with bilateral SCDS, sound- and pressure-induced vertigo most commonly prompted second-side surgery. Despite some degree of oscillopsia after bilateral SCDS surgery, patients were very satisfied with second-side surgery, given their relief from other SCDS symptoms.