mike at psych.ualberta.ca (Mike Dawson) writes:
>hucka at engin.umich.edu (Michael Hucka) writes:
>>2) Does anyone know of any creature that has some sort of vision system but
>>cannot sense visual motion?
>I do not know of any *normal* creature of this sort. However, there
>is a very famous clinical case, the so-called "motion blind patient".
>This woman has suffered damage to visual system MT from a stroke.
>Her ability to see static objects is unaffected, as measured by a
>large number of standard psychophysical techniques. However, her
>ability to see movement has almost been totally erased.
This has always struck me as very weird. What does she see instead of
motion? Nothing? Or a series of "still images"? (But wouldn't this
"look" like motion?) Or what?
John E. Anderson 1 Bungtown Road
Beckman Neuroscience Center Cold Spring Harbor, NY 11724-2220
Cold Spring Harbor Laboratory FAX 516-367-8873