Compound movements reaching and grasping during walking.

Bouma, S.M. (2010) Compound movements reaching and grasping during walking. thesis, Human Movement Sciences.

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Abstract

This study examined the effects of walking velocity, object size and object height in compound locomotor and prehensile movements. Eight healthy young right handed adults (six males, two females) walked at three different velocities (slow, comfortable and fast) while reached and grasped for objects of two different sizes (small and large) and at three different heights (hand, elbow and shoulder). Six infrared light emitting diodes (I REDs) were attached to the hand (three), the trunk (one) and the feet (two). To investigate if the transport component and the grasp component are controlled by temporal or spatial information, walking velocity was manipulated. The main results showed that the reach duration was negatively associated with walking speed, but the reach initiation distance remained stable over different walking velocities. In contrast, the grasp component showed an increase in closure initiation distance with walking velocity, but no effect on the closure duration. Taken together, it can be concluded that, during compound locomotor and prehensile movements, the reach component is controlled by spatial information and that the grasp component is controlled by temporal information. The latter finding suggests that participants may use time-to-contact information to initiate hand closure during compound locomotor and prehensile movements.

Item Type:	Thesis (Thesis)
Supervisor name:	Oter, Dr. A.R. den
Faculty:	Medical Sciences
Date Deposited:	25 Jun 2020 11:01
Last Modified:	25 Jun 2020 11:01
URI:	https://umcg.studenttheses.ub.rug.nl/id/eprint/2136

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