Movement, posture and equilibrium: Interaction and coordination

Massion, J

doi:10.1016/0301-0082(92)90034-c

Cited by 1,377 publications

(827 citation statements)

References 93 publications

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“…This individual difference in dominance would suggest complicated factors related to selection of active muscles during floor oscillation at high frequency. These factors are postulated to include 1) the requirement for forward shift of CFP , 2) maintenance of a perceptional axis of the direction of gravity by keeping the trunk vertical, and 3) adjustment of positional relationship between the trunk and leg to maintain the body equilibrium [12,17,23]. …”

Section: Discussionmentioning

confidence: 99%

“…The trunk muscles may play a functional role in keeping the trunk vertical and maintaining a perceptional axis of the direction of gravity. The thigh muscles, in addition to assisting in this trunk function, adjust the positional relationship between the trunk and leg to maintain the equilibrium of the entire body [12,17,23]. Therefore, it is highly possible that the trunk and thigh muscles show different characteristics of activation.…”

Section: Introductionmentioning

confidence: 99%

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Postural muscle activity patterns during standing at rest and on an oscillating floor

Fujiwara

Toyama

Kiyota

et al. 2006

Journal of Electromyography and Kinesiology

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Postural muscle activity pattern was examined in the eyes-closed state after adequate adaptation to floor anteroposterior oscillation. Twenty-three subjects were grouped almost evenly according to dominance of anterior or posterior postural muscles in the trunk and thigh during quiet stance. In the posterior-dominant group, this dominance was maintained at every frequency in most subjects. In the anterior-dominant group, this dominance was maintained in most subjects at 0.1 and 0.5Hz but changed to posterior dominance at 1.0 and 1.5 Hz in about half the subjects.Periodicity of muscle activity was evaluated by EMG amplitude spectrum at the floor oscillation frequency. Periodicity of posterior-dominant muscles in the trunk and thigh increased with increasing oscillatory frequency. In the trunk, the periodicity did not differ significantly between posterior-dominant and anterior-dominant groups. However, in the thigh, periodicity was significantly lower in the anterior-dominant muscles. This was considered to be caused by nonperiodic alternating action of the anterior and posterior muscles. In the lower leg, posterior dominance was observed in quiet stance and at all oscillation frequencies. Periodicity of soleus and gastrocnemius increased at higher frequencies and was higher in gastrocnemius than in soleus. The periodicity 5 10 15 2 difference between both muscles decreased with increasing oscillation frequency.3

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Postural muscle activity patterns during standing at rest and on an oscillating floor

Fujiwara

Toyama

Kiyota

et al. 2006

Journal of Electromyography and Kinesiology

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“…Furthermore, several studies have shown altered function of the supplementary motor area in PD due to its indirect connections with the basal ganglia (Cunnington et al 1996;Grafton et al 1995). The supplementary motor is one structure thought to have a major role with the preparation of movement (Brinkman 1984;Cunnington et al 1996) and also specifically with anticipatory postural adjustments (Massion 1992;Massion et al 1989). However, our results did not support the hypothesis that individuals with PD do not move their COM adequately over the base of support prior to lift-off.…”

Section: Altered Movement Strategymentioning

confidence: 99%

Postural control during a sit-to-stand task in individuals with mild Parkinson's disease

Inkster

Eng

2004

Experimental Brain Research

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Individuals with Parkinson's disease (PD) typically have difficulty rising from a chair. A major contributing factor may be altered anticipatory postural control; this hypothesis has been fueled by reports of altered function of the supplementary motor area in PD, an area linked to the preparation of movements. This study tested the hypothesis that individuals with PD would exhibit altered anticipatory postural control which would include a reduced preparatory hip flexion and decreased forward displacement of the COM prior to lift-off of the buttocks from the chair. Ten male subjects with PD and 10 male age-matched controls were instructed to rise from a chair without the use of their arms at their comfortable pace on two separated days during on and offmedication states. Body movements were recorded with an optoelectronic device, in addition to forces under the buttocks and each foot to calculate lower extremity joint angles, joint moments and net body centre of mass displacement (COM). The sit-to-stand (STS) duration was the same for the PD-on and controls, but greater for the PD-off group. The PD groups (on and off) used a hip flexion strategy (greater preparatory hip flexion displacement and forward COM displacement, reduced knee extensor moments) compared to the controls. Contrary to predictions, subjects with PD exaggerated, rather than reduced, the movement preparation of the STS using a hip flexion strategy. Possible underlying causes of this flexion strategy could include compensation for poor lower extremity muscle strength and a need for greater postural stability during the lift-off phase.

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“…For example, Scholl & Tremoulet (2000) have demonstrated that people spontaneously perceive physical movements in social terms. It has been suggested that motor acts have two identifiable components -a teleokinetic component which is the goal oriented movement and an ereismatic component which provides the postural support for the movement and maintains equilibrium (Massion, 1992). Partly because of the polymorphous or multidimensional nature of behavior, there is, as yet, no single set of satisfactory criteria for defining either single events or complexes of events (Fentress, 1992).…”

Section: Behavior Is Locomotionmentioning

confidence: 99%