Sensory, motor, and combined contexts for context-specific adaptation of saccade gain in humans.
Saccadic eye movements can be adapted in a context-specific manner such that their gain can be made to depend on the state of a prevailing context cue. We asked whether context cues are more effective if their nature is primarily sensory, motor, or a combination of sensory and motor. Subjects underwent context-specific adaptation using one of three different context cues: a pure sensory context (head roll-tilt right or left); a pure motor context (changes in saccade direction); or a combined sensory-motor context (head roll-tilt and changes in saccade direction). We observed context-specific adaptation in each condition; the greatest degree of context-specificity occurred in paradigms that used the motor cue, alone or in conjunction with the sensory cue.
Shelhamer
Mark
M
Department of Otolaryngology-Head & Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA. mjs@dizzy.med.jhu.edu
Clendaniel
Richard
R
D000222:Adaptation, Physiological / Q000502:physiology*; D000328:Adult; D003463:Cues; D019416:Head Movements / Q000502:physiology; D006801:Humans; D008297:Male; D009046:Motor Neurons / Q000502:physiology*; D009475:Neurons, Afferent / Q000502:physiology*; D010775:Photic Stimulation; D012438:Saccades / Q000502:physiology*