Anticipatory postural adjustments depend on final equilibrium and task complexity in vertical high jump movements

Pellec, Armande Le; Maton, B.

doi:10.1016/s1050-6411(00)00006-7

Cited by 22 publications

(15 citation statements)

References 34 publications

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“…The basic generating mechanism of APA in the tiptoe movement has been suggested 19,20) to be the same as the one observed in stepping 17) and jumping 15) . When posture changes from a static standing position to tiptoeing, Gas as a plantar flexor muscle is inhibited, and TA as a dorsiflexor muscle becomes activated.…”

Section: Change Of the Apa In The Repetitive Tiptoe Movementmentioning

confidence: 85%

“…In the studies of Lipshits et al 22) and Pellec et al 15) , APA and the postural muscle activities changed according to the complexity of the task.…”

Section: Change Of the Apa In The Repetitive Tiptoe Movementmentioning

confidence: 93%

“…Pellec et al have reported comparison of the APA responses during single and repetitive jumping tasks initiated from the same standing posture 15) . They found significant differences in the activation time of the postural muscles and in the distance of the antero-posterior displacement of the COP between both jumping tasks.…”

Section: Introductionmentioning

confidence: 99%

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Effects on Anticipatory Postural Adjustments by Repetition of the Tiptoe Movement

et al. 2007

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Abstract. The purpose of this study was to investigate the influence of repetition on anticipatory postural adjustments between two tiptoe movement tasks. Ten healthy young male (22.5 ± 2.6 years old) participated in this study. They stood on tiptoe from standing position as quickly as possible after an auditory stimulus. Single and repetitive tasks as the tiptoe movement task were performed. Electromyogram during the tiptoe movement was measured in the gastrocnemius (Gas), tibialis anterior (TA), biceps femoris (BF), rectus femoris (RF), erector spinae (ES) and rectus abdominus (RA). The characteristics of the initial tiptoe movement during each task were established by analysis of kinematics data. Onsets of each muscle activity, integrated electromyography (EMG) and center of pressure (COP) displacement prior to the onset of Gas were compared between the single and repetitive tasks. The onset of TA and RF in the repetitive task was earlier than that of the single task, and integrated EMG per unit time and COP displacement also changed. These results suggest that the central nervous system may transmit different motor commands to postural muscles during single and repetitive tasks, and anticipatory postural adjustment might be modulated by the repetition of task.

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Section: Change Of the Apa In The Repetitive Tiptoe Movementmentioning

confidence: 85%

“…In the studies of Lipshits et al 22) and Pellec et al 15) , APA and the postural muscle activities changed according to the complexity of the task.…”

Section: Change Of the Apa In The Repetitive Tiptoe Movementmentioning

confidence: 93%

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Effects on Anticipatory Postural Adjustments by Repetition of the Tiptoe Movement

et al. 2007

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“…In healthy subjects, the reaction time on the opposing side was fast. This suggests a change in the center of pressure and the occurrence of anticipatory postural adjustments [17,18] before first stepping on the tilted side in response to the tilt. The fact that stepping power was greater on the tilted than on the opposing side indicates that this contributes to maintaining balance and prevented the subject from falling over on the tilted side.…”

Section: Discussionmentioning

confidence: 95%

Postural control capability of ACL-deficient knee after sudden tilting

Ihara

Takayama²,

Fukumoto

2008

Gait & Posture

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“…In many cases it is reasonably straightforward to define the task and its goal-for instance, with regard to simpler tasks such as reaching, grasping, or manipulating (e.g., Todorov & Jordan, 2002), coordinating between limbs (e.g., Haken, Kelso, & Bunz, 1985;Kugler & Turvey, 1987), or even more complex tasks, such as those seen in various sport events, including the high jump (Le Pellec & Maton, 2000), javelin (Best et al, 1993), baseball pitch (DiGiovine et al, 1992), and golf swing (Nesbit, 2005). Even though walking and running are both important and natural motor tasks, it is not nearly so easy to define precisely what these tasks are, or the goal that the motor control system is accomplishing in each.…”

Section: Abstract Locomotion Walking Task Constraint Economymentioning

confidence: 99%

The goal of locomotion: Separating the fundamental task from the mechanisms that accomplish it

2017

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Human locomotion has been well described but is still not well understood. This is largely true because the observable aspects of locomotion-neuromuscular activity that generates forces and motions-relate to both the task solution and the problem being solved. Identifying the fundamental task achieved in locomotion makes it possible to critically evaluate the motor control strategy used to accomplish the task goal. We contend that the readily observed movements and activities of locomotion should be considered mechanism(s). Our proposal is that the fundamental task of walking and running is analogous to flight, and should be defined in terms of the interaction of the individual's mass with the medium in which it moves: a low-density fluid for flight, or the supporting substrate for legged locomotion. A rigorous definition of the fundamental task can help identify the constraints and opportunities that influence its solution and guide the selection of appropriate mechanisms to accomplish the task effectively. The results from robotics-based modeling studies have demonstrated how the interaction of the mass and substrate can be optimized, making the goal of movement a defined trajectory of the individual's mass. We assessed these concepts by evaluating the ground reaction forces generated by an optimization model that satisfies the task but uses none of the mechanisms that are available to the human leg. Then we compared this model to normal human walking. Although it is obvious that the specific task of locomotion changes with a variety of movement challenges, clearly identifying the fundamental task of locomotion puts all other features in an interpretable context.

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Anticipatory postural adjustments depend on final equilibrium and task complexity in vertical high jump movements

Cited by 22 publications

References 34 publications

Effects on Anticipatory Postural Adjustments by Repetition of the Tiptoe Movement

Effects on Anticipatory Postural Adjustments by Repetition of the Tiptoe Movement

Postural control capability of ACL-deficient knee after sudden tilting

The goal of locomotion: Separating the fundamental task from the mechanisms that accomplish it

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