Details

Autor(en) / Beteiligte

• Fourkas, Alissa D.
• Marteniuk, Ronald G.
• Khan, Michael A.

Titel

Guiding Movements with Internal Representations: A Reach-and-Grasp Task

Ist Teil von

• Research quarterly for exercise and sport, 2003-06, Vol.74 (2), p.165-172

Ort / Verlag

United States: Taylor & Francis Group

Erscheinungsjahr

2003

Quelle

Taylor & Francis

Beschreibungen/Notizen

• We investigated participants' ability to use internal representations of the environment to guide prehensile movements, when visual feedback was not available. Reaching and grasping performed with concurrent visual feedback was compared to conditions in which participants actively formed spatial images and passively encoded images from visually presented information. Movement times, the proportion of time spent after peak velocity and peak apertures, were greater when concurrent visual feedback was unavailable. Movement times increased as a function of premovement occlusion length, with passively encoded images resulting in shorter movement durations than actively formed images. The findings indicated that participants adapted their movement trajectories to compensate for the degradation of stored spatial information, when concurrent visual feedback was not available.