Velocity discrimination in the cat |
| |
Authors: | E Vandenbussche G A Orban H Maes |
| |
Institution: | 1. Department of Psychology, Michigan State University, East Lansing, MI, United States;2. Division of Psychiatry and Behavioral Medicine, Michigan State University, Grand Rapids, MI, United States;3. Melbourne School of Psychological Science, University of Melbourne, Parkville, VIC, Australia |
| |
Abstract: | After considerable training (over 2 years) we measured the just noticeable differences (JNDs) in velocity as a function of reference velocity in three cats. The velocity discrimination curve plotting JNDs in velocity, expressed as Weber fractions as a function of reference velocity is U-shaped with optimal performance at reference speeds between 25 and 60 degrees/sec. The discrimination curve changed little with a tenfold change in slit width. Compared to the human velocity discrimination curve determined with the same test apparatus, the feline curve is narrower and shifted towards faster velocities and larger Weber fractions. These results support our specific linking hypothesis between velocity tuned cells as observed in cortical areas 17 and 18 of the cat, and velocity discrimination. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|