Role of Vestibular Input in Triggering and Modulating Postural Responses in Unilateral and Bilateral Vestibular Loss Patients

2009 ◽  
Vol 14 (2) ◽  
pp. 130-138 ◽  
Author(s):  
F. Mbongo ◽  
C. Qu’hen ◽  
P.P. Vidal ◽  
P. Tran Ba Huy ◽  
C. de Waele
Keyword(s):  
Vestibular Input ◽  
Vestibular Loss ◽  
Bilateral Vestibular Loss ◽  
Postural Responses

Bilateral Vestibular Loss Leads to Active Destabilization of Balance During Voluntary Head Turns in the Standing Cat

2006 ◽  
Vol 95 (6) ◽  
pp. 3783-3797 ◽  
Author(s):  
Paul J. Stapley ◽  
Lena H. Ting ◽  
Chen Kuifu ◽  
Dirk G. Everaert ◽  
Jane M. Macpherson
Keyword(s):  
Vertical Axis ◽  
The Body ◽  
Head Turn ◽  
Vestibular Input ◽  
Ipsilateral Side ◽  
Vestibular Loss ◽  
Bilateral Vestibular Loss ◽  
Postural Responses ◽  
Postural Imbalance ◽  
Lateral Head

The purpose of this study was to determine the source of postural instability in labyrinthectomized cats during lateral head turns. Cats were trained to maintain the head in a forward orientation and then perform a rapid, large-amplitude head turn to left or right in yaw, while standing freely on a force platform. Head turns were biomechanically complex with the primary movement in the yaw plane accompanied by an ipsilateral ear-down roll and nose-down pitch. Cats used a strategy of pushing off by activating extensors of the contralateral forelimb while using all four limbs to produce a rotational moment of force about the vertical axis. After bilateral labyrinthectomy, the initial components of the head turn and accompanying postural responses were hypermetric, but otherwise similar to those produced before the lesion. However, near the time of peak yaw velocity, the lesioned cats produced an unexpected burst in extensors of the contralateral limbs that thrust the body to the ipsilateral side, leading to falls. This postural error was in the frontal (roll) plane, even though the primary movement was a rotation in the horizontal (yaw) plane. The response error decreased in amplitude with compensation but did not disappear. We conclude that lack of vestibular input results in active destabilization of balance during voluntary head movement. We postulate that the postural imbalance arises from the misperception that the trunk was rolling contralaterally, based on signals from neck proprioceptors in the absence of vestibular inputs.

Vestibular loss disrupts daily rhythm in rats

2015 ◽  
Vol 118 (3) ◽  
pp. 310-318 ◽  
Author(s):  
T. Martin ◽  
B. Mauvieux ◽  
J. Bulla ◽  
G. Quarck ◽  
D. Davenne ◽  
...  
Keyword(s):  
Daily Rhythm ◽  
Control Group ◽  
Vestibular Input ◽  
Daily Rhythms ◽  
Cell Degeneration ◽  
Vestibular Loss ◽  
Anatomical Structures ◽  
Bilateral Vestibular Loss ◽  
Vestibular Lesion ◽  
Vestibular Pathology

Hypergravity disrupts the circadian regulation of temperature (Temp) and locomotor activity (Act) mediated through the vestibular otolithic system in mice. In contrast, we do not know whether the anatomical structures associated with vestibular input are crucial for circadian rhythm regulation at 1 G on Earth. In the present study we observed the effects of bilateral vestibular loss (BVL) on the daily rhythms of Temp and Act in semipigmented rats. Our model of vestibular lesion allowed for selective peripheral hair cell degeneration without any other damage. Rats with BVL exhibited a disruption in their daily rhythms (Temp and Act), which were replaced by a main ultradian period (τ <20 h) for 115.8 ± 68.6 h after vestibular lesion compared with rats in the control group. Daily rhythms of Temp and Act in rats with BVL recovered within 1 wk, probably counterbalanced by photic and other nonphotic time cues. No correlation was found between Temp and Act daily rhythms after vestibular lesion in rats with BVL, suggesting a direct influence of vestibular input on the suprachiasmatic nucleus. Our findings support the hypothesis that the vestibular system has an influence on daily rhythm homeostasis in semipigmented rats on Earth, and raise the question of whether daily rhythms might be altered due to vestibular pathology in humans.

Postural responses to vibration of neck muscles in patients with uni- and bilateral vestibular loss

1998 ◽  
Vol 7 (3) ◽  
pp. 228-236 ◽  
Author(s):  
Hamid Lekhel ◽  
Konstantin Popov ◽  
Adolfo Bronstein ◽  
Michael Gresty
Keyword(s):  
Neck Muscles ◽  
Vestibular Loss ◽  
Bilateral Vestibular Loss ◽  
Postural Responses

scholarly journals Vibrotactile feedback improves balance and mobility in patients with severe bilateral vestibular loss

2018 ◽  
Vol 266 (S1) ◽  
pp. 19-26 ◽  
Author(s):  
Herman Kingma ◽  
Lilian Felipe ◽  
Marie-Cecile Gerards ◽  
Peter Gerits ◽  
Nils Guinand ◽  
...  
Keyword(s):  
Vibrotactile Feedback ◽  
Vestibular Loss ◽  
Bilateral Vestibular Loss

scholarly journals Chronic Electrical Stimulation of the Otolith Organ: Preliminary Results in Humans with Bilateral Vestibulopathy and Sensorineural Hearing Loss

2019 ◽  
Vol 25 (Suppl. 1-2) ◽  
pp. 79-90 ◽  
Author(s):  
Angel Ramos Macias ◽  
Angel Ramos de Miguel ◽  
Isaura Rodriguez Montesdeoca ◽  
Silvia Borkoski Barreiro ◽  
Juan Carlos Falcón González
Keyword(s):  
Electrical Stimulation ◽  
Vestibular Evoked Myogenic Potentials ◽  
Head Impulse Test ◽  
Clinical Test ◽  
Otolith Organ ◽  
Bilateral Vestibulopathy ◽  
Vestibular Loss ◽  
Bilateral Vestibular Loss ◽  
Chronic Electrical Stimulation ◽  
Stimulation Of

Introduction: Bilateral vestibulopathy is an important cause of imbalance that is misdiagnosed. The clinical management of patients with bilateral vestibular loss remains difficult as there is no clear evidence for an effective treatment. In this paper, we try to analyze the effect of chronic electrical stimulation and adaptation to electrical stimulation of the vestibular system in humans when stimulating the otolith organ with a constant pulse train to mitigate imbalance due to bilateral vestibular dysfunction (BVD). Methods: We included 2 patients in our study with BVD according to Criteria Consensus of the Classification Committee of the Bárány Society. Both cases were implanted by using a full-band straight electrode to stimulate the otoliths organs and simultaneously for the cochlear stimulation we use a perimodiolar electrode. Results: In both cases Vestibular and clinical test (video head impulse test, videonistagmography cervical vestibular evoked myogenic potentials, cVEMP and oVEMP), subjective visual vertical test, computerized dynamic posturography, dynamic gait index, Time UP and Go test and dizziness handicap index) were performed. Posture and gait metrics reveal important improvement if compare with preoperartive situation. Oscillopsia, unsteadiness, independence and quality of life improved to almost normal situation. Discussion/Conclusion: Prosthetic implantation of the otolith organ in humans is technically feasible. Electrical stimulation might have potential effects on balance and this is stable after 1 year follow-up. This research provides new possibilities for the development of vestibular implants to improve gravito-inertial acceleration sensation, in this case by the otoliths stimulation.

Idiopathic Bilateral Vestibular Loss: Diagnosis and Management

1995 ◽  
Vol 113 (2) ◽  
pp. P154-P154
Author(s):  
Eric W. Sargent ◽  
Joel Goebel ◽  
Jason Hanson ◽  
Douglas Beck
Keyword(s):  
Vestibular Loss ◽  
Diagnosis And Management ◽  
Bilateral Vestibular Loss
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