Tactile discrimination of gratings: psychophysical and neural correlates in human and monkey.
Human and monkey performance on discriminating tactile gratings revealed comparable cross-species Weber functions. Neural data obtained while monkeys performed discriminations revealed some matching of neural and psychometric functions. Nearly constant firing rate differences occurred at discrimination threshold for unequal groove widths. Firing rate differences of some cells decreased on trials preceding discrimination errors, and thus predicted performance.
Sinclair
R J
RJ
Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, Missouri 63110.
Burton
H
H
D000818:Animals; D004193:Discrimination Learning / Q000502:physiology*; D005073:Evoked Potentials, Somatosensory / Q000502:physiology; D005385:Fingers / Q000294:innervation*; D006801:Humans; D008253:Macaca mulatta; D008297:Male; D008465:Mechanoreceptors / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D011601:Psychophysics; D012684:Sensory Thresholds / Q000502:physiology; D013003:Somatosensory Cortex / Q000502:physiology; D013045:Species Specificity; D014110:Touch / Q000502:physiology*