TY - JOUR
T1 - Abnormal postural control associated with peripheral vestibular disorders
AU - Black, F. O.
AU - Shupert, C. L.
AU - Horak, F. B.
AU - Nashner, L. M.
N1 - Funding Information:
These studies were supported by a fellowship from the National Institute of Handicapped Research and by grants from the Deafness Research Foundation, the Medical Research Foundation of Oregon to F.B.H., and the National Institutes of Health (NS19222 to F.O.B., NS12661 to L.M.N., and AGO6457 and NS01094 to F.B.H.). The studies of hearing impaired children were carried out in collaboration with Anne Shumway-Cook and Terry Crowe. The technical assistance of Robert J. Peterka, without which this work would not have been possible, is also gratefully acknowledged.
PY - 1988/1
Y1 - 1988/1
N2 - The development of a systematic approach to the diagnosis and management of ataxias of vestibular origin depends critically on the elucidation of the complex sensory and motor interactions involved in human postural control. In this paper, the results of studies of both sensory and motor control of posture in adults and children with peripheral vestibular deficits are summarized and reviewed. In studies of the sensory organization of postural control, normal subjects and patients with peripheral vestibular deficits were exposed to unreliable information from their support surface and/or visual surround during quiet stance. While normal adults and children were able to maintain balance under these conditions, the majority of children and adults with peripheral vestibular deficits showed one or both of the following abnormalities: (1)Vestibular loss patients were unable to maintain equilibrium when forced to rely on vestibular information for postural control. (2)Vestibular distortion patients were unable to select an accurate source of sensory information when exposed to sensory conflicts during quiet stance. Preliminary results of studies of motor coordination in these patients also suggest that vestibular loss patients rely almost exclusively on ankle sway to control posture, even during balance tasks which require hip movements to maintain equilibrium. In contrast, some vestibular distortion patients appear to rely on hip motions, even when not required to do so to maintain balance. The results of these studies are discussed in terms of the implications for both sensory and motor aspects of postural control in patients with ataxias of vestibular origin.
AB - The development of a systematic approach to the diagnosis and management of ataxias of vestibular origin depends critically on the elucidation of the complex sensory and motor interactions involved in human postural control. In this paper, the results of studies of both sensory and motor control of posture in adults and children with peripheral vestibular deficits are summarized and reviewed. In studies of the sensory organization of postural control, normal subjects and patients with peripheral vestibular deficits were exposed to unreliable information from their support surface and/or visual surround during quiet stance. While normal adults and children were able to maintain balance under these conditions, the majority of children and adults with peripheral vestibular deficits showed one or both of the following abnormalities: (1)Vestibular loss patients were unable to maintain equilibrium when forced to rely on vestibular information for postural control. (2)Vestibular distortion patients were unable to select an accurate source of sensory information when exposed to sensory conflicts during quiet stance. Preliminary results of studies of motor coordination in these patients also suggest that vestibular loss patients rely almost exclusively on ankle sway to control posture, even during balance tasks which require hip movements to maintain equilibrium. In contrast, some vestibular distortion patients appear to rely on hip motions, even when not required to do so to maintain balance. The results of these studies are discussed in terms of the implications for both sensory and motor aspects of postural control in patients with ataxias of vestibular origin.
UR - http://www.scopus.com/inward/record.url?scp=0023735682&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0023735682&partnerID=8YFLogxK
U2 - 10.1016/S0079-6123(08)64513-6
DO - 10.1016/S0079-6123(08)64513-6
M3 - Article
C2 - 3265212
AN - SCOPUS:0023735682
SN - 0079-6123
VL - 76
SP - 263
EP - 275
JO - Progress in Brain Research
JF - Progress in Brain Research
IS - C
ER -