Invariant Characteristics of Gait Initiation

Brunt, Denis; Lafferty, M J; McKeon, Ashlee B.; Goode, Barry; Mulhausen, C; Polk, P

doi:10.1097/00002060-199108000-00009

Cited by 132 publications

(92 citation statements)

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“…Similarly to what was observed during the first phase of sit-to-stand and stand-tosit, stereotyped activity patterns have been demonstrated during the first phase of gait initiation (Brunt et al, 1991;Brunt et al, 1999;Crenna et al, 1991;Elble et al, 1994;Fiolkowski et al, 2002;Shapiro et al, 1981). The inhibition of the tonically active soleus followed by the activation of the tibialis anterior early in gait initiation (Crenna et al, 1991;Elble et al, 1994;Jian et al, 1993) enable the backward displacement of the centre of pressure (Brunt et al, 1991;Crenna et al, 1991), contributing to postural stability (Massion, 1992;McIlroy et al, 1999), as well as the optimum generation of momentum at the end of the first step to reach the steady-state gait (Lepers et al, 1995).…”

Section: -Postural Control Dysfunction In the Ipsilesional Sidesupporting

confidence: 67%

“…The inhibition of the tonically active soleus followed by the activation of the tibialis anterior early in gait initiation (Crenna et al, 1991;Elble et al, 1994;Jian et al, 1993) enable the backward displacement of the centre of pressure (Brunt et al, 1991;Crenna et al, 1991), contributing to postural stability (Massion, 1992;McIlroy et al, 1999), as well as the optimum generation of momentum at the end of the first step to reach the steady-state gait (Lepers et al, 1995). Recent studies have demonstrated that subcortical post-stroke subjects present failure in modulating the soleus timing in both contralesional and ipsilesional limbs (Sousa et al, 2015a), which is associated with a decreased backward displacement of the centre of pressure (Sousa et al, 2015a(Sousa et al, , 2015b.…”

Section: -Postural Control Dysfunction In the Ipsilesional Sidementioning

confidence: 99%

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The role of the ipsilesional side in the rehabilitation of post-stroke subjects

Silva

Sousa

Silva

et al. 2017

Somatosensory & Motor Research

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Section: -Postural Control Dysfunction In the Ipsilesional Sidesupporting

confidence: 67%

Section: -Postural Control Dysfunction In the Ipsilesional Sidementioning

confidence: 99%

The role of the ipsilesional side in the rehabilitation of post-stroke subjects

Silva

Sousa

Silva

et al. 2017

Somatosensory & Motor Research

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“…Hass et al 8) reported that Tai Chi participants increased the magnitude of the backward displacement of A-P COP closer to the magnitude reported for more healthy older adults, whereas non-participants showed little change in the displacement of the A-P COP after a wellness education program. During gait initiation, the backward movement of the center of pressure is caused by an inhibition of the tonic soleus, which is active during a quiet stance followed by the onset of the tibialis anterior of both the swing and stance limbs [27][28][29] . This reduction in the magnitude of the displacement of the A-P COP as observed for the control group subjects may result from the disruption of the stereotypical pattern of lower extremity muscle activity during obstacle avoidance 10) .…”

Section: Discussionmentioning

confidence: 99%

Effects of Tai Chi Exercise on the Center of Pressure Trace during Obstacle Crossing in Older Adults who are at a Risk of Falling

Kim

2009

J Phys Ther Sci

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Abstract.[Purpose] The purpose of this study was to investigate the changes of the center of pressure (COP) trace in fall-prone older adults during obstacle crossing before and after Tai Chi exercise.[Subjects] Fifty-two fall-prone older adults participated in either a 12-week intervention of Tai Chi exercise or in a health education program.[Methods] The subjects were pre-and post-tested in a task in which they were asked to step over an obstacle from a quiet stance. The subjects were divided into two groups (the experimental group and the control group). Participants in the experimental group received Tai Chi exercise emphasizing dynamic weight shifting three times weekly. Participants in the control group met for one-hour weekly and listened to lectures about health promotion. Performance was assessed by recording the changes in the displacement of the COP in the anteroposterior (A-P) and mediolateral (M-L) directions using a force platform.[Results] The experimental group of subjects significantly increased A-P and M-L displacement of the COP after Tai Chi exercise (p<0.05).[Conclusion] This study shows that participation in Tai Chi exercise increased the magnitude of the A-P and M-L displacement of the COP, thereby improving the ability of older adults to generate momentum to initiate gait.

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“…active during a quiet stance followed by the onset of the tibialis anterior of both the swing and stance limbs [25][26][27] . This reduction in the magnitude of the displacement of the A-P COP and in forward momentum observed in older adults would result f r o m r e d u c e d i n h i b i t i o n o f s o l e u s a n d gastrocnemius activity and increased ankle joint stiffness related to aging 28) .…”

Section: Discussionmentioning

confidence: 99%

Age-Related Changes in the Center of Pressure Trajectory during Obstacle Crossing

Kim

2009

J Phys Ther Sci

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Abstract.[Purpose] The purpose of this study was to determine how younger and older adults modulate the center of pressure (COP) trajectory in the anteroposterior (A-P) and mediolateral (M-L) directions while stepping over an obstacle and during gait initiation (GI).[Subjects] Fifteen community-dwelling healthy older adults and fifteen healthy younger adults volunteered to participate in this study.[Methods] Subjects initiated gait or stepped over an obstacle at a self-paced speed with the right limb, in response to auditory cues. Performance was assessed by recording changes in the displacement of the COP in the A-P and M-L directions using two force plates.[Results] For combined test conditions, the A-P and M-L displacements of the COP in the older adults were significantly lower than the A-P and M-L displacements of the COP in the younger adults (p < 0.05). However, there were no significant differences between GI and stepping conditions for the COP shift (p > 0.05).[Conclusion] These findings suggest that a reduction in the magnitude of the COP shift with obstacle avoidance diminishes the ability of older adults to generate forward momentum and to maintain the lateral stability that is highly related to falls.

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Invariant Characteristics of Gait Initiation

Cited by 132 publications

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The role of the ipsilesional side in the rehabilitation of post-stroke subjects

The role of the ipsilesional side in the rehabilitation of post-stroke subjects

Effects of Tai Chi Exercise on the Center of Pressure Trace during Obstacle Crossing in Older Adults who are at a Risk of Falling

Age-Related Changes in the Center of Pressure Trajectory during Obstacle Crossing

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