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Maintenance of lateral stability during standing and walking in the cat.

Nyström, Anastasia LU ; Zelenin, P V; Orlovsky, G N; Sirota, M G; Beloozerova, I N and Deliagina, T G (2009) In Journal of Neurophysiology 101(1). p.8-19
Abstract
During free behaviors animals often experience lateral forces, such as collisions with obstacles or interactions with other animals. We studied postural reactions to lateral pulses of force (pushes) in the cat during standing and walking. During standing, a push applied to the hip region caused a lateral deviation of the caudal trunk, followed by a return to the initial position. The corrective hindlimb electromyographic (EMG) pattern included an initial wave of excitation in most extensors of the hindlimb contralateral to push and inhibition of those in the ipsilateral limb. In cats walking on a treadmill with only hindlimbs, application of force also caused lateral deviation of the caudal trunk, with subsequent return to the initial... (More)
During free behaviors animals often experience lateral forces, such as collisions with obstacles or interactions with other animals. We studied postural reactions to lateral pulses of force (pushes) in the cat during standing and walking. During standing, a push applied to the hip region caused a lateral deviation of the caudal trunk, followed by a return to the initial position. The corrective hindlimb electromyographic (EMG) pattern included an initial wave of excitation in most extensors of the hindlimb contralateral to push and inhibition of those in the ipsilateral limb. In cats walking on a treadmill with only hindlimbs, application of force also caused lateral deviation of the caudal trunk, with subsequent return to the initial position. The type of corrective movement depended on the pulse timing relative to the step cycle. If the force was applied at the end of the stance phase of one of the limbs or during its swing phase, a lateral component appeared in the swing trajectory of this limb. The corrective step was directed either inward (when the corrective limb was ipsilateral to force application) or outward (when it was contralateral). The EMG pattern in the corrective limb was characterized by considerable modification of the hip abductor and adductor activity in the perturbed step. Thus the basic mechanisms for balance control in these two forms of behavior are different. They perform a redistribution of muscle activity between symmetrical limbs (in standing) and a reconfiguration of the base of support during a corrective lateral step (in walking). (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Functional Laterality, Forelimb, Electromyography, Implanted, Electrodes, Statistical, Data Interpretation, Cats, Animals, Biomechanics, Hindlimb, Individuality, Muscle, Skeletal, Posture, Video Recording, Walking
in
Journal of Neurophysiology
volume
101
issue
1
pages
8 - 19
publisher
American Physiological Society
external identifiers
  • Scopus:58849120088
ISSN
0022-3077
language
English
LU publication?
no
id
77cdd63d-1964-4543-b5d3-844143b4a22c (old id 3132149)
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date added to LUP
2012-11-07 14:37:11
date last changed
2016-10-13 04:32:47
@misc{77cdd63d-1964-4543-b5d3-844143b4a22c,
  abstract     = {During free behaviors animals often experience lateral forces, such as collisions with obstacles or interactions with other animals. We studied postural reactions to lateral pulses of force (pushes) in the cat during standing and walking. During standing, a push applied to the hip region caused a lateral deviation of the caudal trunk, followed by a return to the initial position. The corrective hindlimb electromyographic (EMG) pattern included an initial wave of excitation in most extensors of the hindlimb contralateral to push and inhibition of those in the ipsilateral limb. In cats walking on a treadmill with only hindlimbs, application of force also caused lateral deviation of the caudal trunk, with subsequent return to the initial position. The type of corrective movement depended on the pulse timing relative to the step cycle. If the force was applied at the end of the stance phase of one of the limbs or during its swing phase, a lateral component appeared in the swing trajectory of this limb. The corrective step was directed either inward (when the corrective limb was ipsilateral to force application) or outward (when it was contralateral). The EMG pattern in the corrective limb was characterized by considerable modification of the hip abductor and adductor activity in the perturbed step. Thus the basic mechanisms for balance control in these two forms of behavior are different. They perform a redistribution of muscle activity between symmetrical limbs (in standing) and a reconfiguration of the base of support during a corrective lateral step (in walking).},
  author       = {Nyström, Anastasia and Zelenin, P V and Orlovsky, G N and Sirota, M G and Beloozerova, I N and Deliagina, T G},
  issn         = {0022-3077},
  keyword      = {Functional Laterality,Forelimb,Electromyography,Implanted,Electrodes,Statistical,Data Interpretation,Cats,Animals,Biomechanics,Hindlimb,Individuality,Muscle,Skeletal,Posture,Video Recording,Walking},
  language     = {eng},
  number       = {1},
  pages        = {8--19},
  publisher    = {ARRAY(0x80b8348)},
  series       = {Journal of Neurophysiology},
  title        = {Maintenance of lateral stability during standing and walking in the cat.},
  volume       = {101},
  year         = {2009},
}