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We explored the relationship between hand orientation and movement time. Three groups of participants (n = 8 per group) were asked to grasp an object rotated in one of the following planes: (1) coronal; (2) sagittal; (3) horizontal. In the coronal plane, the rotational requirements directly mapped onto the neuromuscular demands associated with a single joint-level degree of freedom movement. A simple lawful relationship was found between the extent of rotation (pronation or supination) and duration. Reach-to-grasp movements to objects rotated in the sagittal and horizontal plane produced different movement patterns. These patterns increased the muscle level degrees of freedom recruited (higher neuromuscular demands) and movement duration increased correspondingly though not in a simple manner. The results of the present study show unambiguously that object orientation influences the duration of reach-to-grasp movements.

Original publication

DOI

10.1007/s00221-006-0722-1

Type

Journal article

Journal

Exp Brain Res

Publication Date

04/2007

Volume

178

Pages

180 - 193

Keywords

Adult, Female, Hand, Hand Strength, Humans, Male, Middle Aged, Movement, Orientation, Pronation, Psychomotor Performance, Reference Values, Supination, Time Factors, Torque