Biomedical subjects

David P Black

Publications and source records attributed to David P Black.

2 recordsLinked to original sources

PubMed2004

Prism aftereffects disrupt interlimb rhythmic coordination.

The authors examined effects of prism-induced proprioceptive aftereffects on coordination of 95 participants and compared interlimb rhythmic coordination performed before versus after exposure to prisms of varying optical displacements. The observed steady states of relative phase for postprism exposure coordination were shifted by a small but significant amount, but not across all prism conditions. Phase-shift direction was not specific to the direction of optical displacement and was not, across all conditions, proportional to the magnitude of optical displacement. Prism exposure was associated with increased relative phase variability for all prism conditions. A no-prism control group showed no changes in interlimb rhythmic coordination. The results suggest that prism-induced proprioceptive aftereffects have general, disruptive effects on interlimb rhythmic coordination.

Adaptation, Physiological↗

PubMed2003

Prism exposure affects the proprioceptive frames of reference for interlimb rhythmic coordination.

Adaptation to prisms can produce a change in felt arm position, termed proprioceptive shift. We studied the effects of prism-induced proprioceptive shift on interlimb rhythmic coordination performed under proprioceptive guidance, in the absence of vision. Relative to interlimb rhythmic coordination performed before prism exposure, the observed steady states of relative phase for postexposure coordination were shifted by a small but reliable amount. The shift was in the direction expected, given the direction of optical displacement. The amount of variability of interlimb rhythmic coordination was unaffected by prism exposure. The results suggest that the same spatial frames of reference altered by prism adaptation are involved in the production of interlimb rhythmic coordination patterns.

Adult↗