PMID: 9442817Jan 27, 1998Paper

Gain and delay of human vestibulo-ocular reflexes to oscillation and steps of the head by a reactive torque helmet. II. Vestibular-deficient subjects

Acta Oto-laryngologica
S TabakJ Van Der Steen

Abstract

Vestibulo-ocular reflexes (VOR) were evaluated with a reactive torque helmet that imposed high-frequency oscillation (2-20 Hz) or step displacements of the head in the horizontal plane. The present paper describes the results in patients with vestibular deficiencies (labyrinthine defective; LD); experimental and analytical techniques and results for normal subjects were described in Part 1 of this paper. The patient groups included: total unilateral LD (related to acoustic neuroma; n = 40); severe (clinically total) bilateral LD (n = 7); bilateral hyporeflexia (n = 14); unilateral hyporeflexia (n = 11); and patients with LD phenomena that had subsided (n = 3). Helmet-induced head steps provided the most specific information. Characteristically, gain was lowered in one direction or both directions after unilateral or bilateral vestibular lesions, respectively; in general, the magnitude of the gain reduction correlated well with the degree of complaints and disability. Surprisingly, delay was systematically prolonged (up to several tens of milliseconds) in all groups of subjects with manifest vestibular pathology. These results suggest that the determination of delay, in addition to gain of the VOR, is feasible and important in t...Continue Reading

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Citations

Jun 21, 2006·Annals of Biomedical Engineering·Martti JuholaTimo Hirvonen
Jun 17, 2000·Progress in Neurobiology·C L Darlington, P F Smith
Jan 27, 2000·Auris, Nasus, Larynx·T P HirvonenI Pyykkö
Jun 20, 2001·Journal of Neurology, Neurosurgery, and Psychiatry·G WiestR W Baloh
Feb 24, 2010·Journal of the Association for Research in Otolaryngology : JARO·Janine GoumansJohannes van der Steen
Jul 9, 2008·Acta Oto-laryngologica·Meeli HirvonenTimo Petteri Hirvonen
Apr 14, 2005·Annals of the New York Academy of Sciences·M M J HoubenJ Van Der Steen
Sep 15, 2005·Acta Oto-laryngologica·Hong Ju ParkJohn P Carey
Aug 23, 2008·Progress in Brain Research·Konrad P WeberG Michael Halmagyi
Dec 12, 2000·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·T P HirvonenM Juhola
Apr 13, 2018·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Sang Hun LeeHong Ju Park
Oct 10, 2012·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Gene Y Fridman, Charles C Della Santina
Oct 10, 2015·Clinical Otolaryngology : Official Journal of ENT-UK ; Official Journal of Netherlands Society for Oto-Rhino-Laryngology & Cervico-Facial Surgery·M H YooH J Park
Jul 19, 2000·Journal of Neurophysiology·H Collewijn, J B Smeets
Nov 17, 2001·Annals of the New York Academy of Sciences·G M HalmagyiM J Todd

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