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[Q] Visual detection of moving vs. stationary stimuli

Mike Dawson mike at psych.ualberta.ca
Wed Mar 23 08:34:37 EST 1994


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.  For details,
see:

Zihl, J., von Cramon, D., & Mai, N. (1983).  Selective disturbance
	of movement vision after bilateral brain damage.  Brain, 106,
	313-340.

Hess, R.H., Baker, C.L., & Zihl, J. (1989).  The "motion-blind" patient:
	Low-level spatial and temporal filters.  Journal of neuroscience, 9,
	1628-1640.
--
Michael R.W. Dawson                       email: mike at psych.ualberta.ca
Biological Computation Project, Department of Psychology
University of Alberta, Edmonton, AB CANADA T6G 2E9
Tel:  +1 403 492 5175   Fax: +1 403 492 1768



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