Volume 16, Number 14,
Issue of July 15, 1996
pp. 4501-4517
Copyright ©1996 Society for Neuroscience
The Effects of Superior Temporal Cortex Lesions on the Processing
and Retention of Auditory Information in Monkeys (Cebus
apella)
Received Dec. 14, 1995; revised April 22, 1996; accepted May 3, 1996.
Michael Colombo1,
Hillary R. Rodman2, and
Charles G. Gross2
1 Department of Psychology, Rutgers University, New
Brunswick, New Jersey 08903, and 2 Department of
Psychology, Princeton University, Princeton, New Jersey 08544
Three monkeys with extensive preoperative training on visual and
auditory memory tasks (delayed matching-to-sample), an auditory
pattern-discrimination task, and a visual serial-order task, received
bilateral lesions of the superior temporal (ST) cortex in two stages,
with testing after each lesion. Unilateral ST cortex lesions resulted
in only moderate auditory memory impairments, whereas bilateral ST
cortex lesions resulted in severe auditory memory impairments. The
bilateral ST cortex lesions also resulted in severe impairments in the
ability to relearn the auditory pattern-discrimination task. In
contrast to the auditory impairments, neither unilateral nor bilateral
ST cortex lesions had any effect whatsoever on either visual memory or
visual serial-order behavior. These findings indicate that the ST
cortex plays a role in auditory processing and retention similar to
that played by the inferior temporal cortex for visual processing and
retention.
Key words:
auditory cortex;
auditory memory;
visual memory;
delayed matching-to-sample;
serial-order task;
pattern discrimination;
frequency discrimination