PMID- 11733684
DA - 20011204
DCOM- 20020122
IS - 0959-4965
VI - 12
IP - 16
DP - 2001 Nov 16
TI - Visual categorical perception by rats with temporal, striate, or sham ablations.
PG - 3425-31 AB - Rats were trained to discriminate a 0 degrees stripe from a 90 degrees stripe in a two choice water maze. They were prepared with either Te2/3, partial striate (PS), or sham lesions and retrained on the preoperative discrimination. In two separate experiments, excellent savings was observed for all groups. Next, trials were administered with novel stripe orientations defined as either between- or within-category problems. Performance accuracy eroded rapidly for all groups in the first experiment, and no between-group differences were observed. In the second experiment, each session with categorical stimuli was preceded by four reminder trials with the original stimuli. This improved accuracy for all groups, but it was found that animals with PS lesions, not animals with T2/3 lesions, were impaired on between-category judgements. The impairment was not secondary to a disruption of basic visual sensory processing or significantly larger lesions relative to the Te2/3 group. As is the case for monkeys, accuracy with within-category stimuli was inferior to between-category stimuli for all groups. Possible reasons for this inter-species difference are discussed.
AD - Department of Psychology, Georgia College and State University,
Milledgeville, GA 31061-0490, USA.
FAU - Maki, S L
AU - Maki SL
FAU - McDaniel, W F
AU - McDaniel WF
FAU - Boyce, K C
AU - Boyce KC
FAU - Brown, C M
AU - Brown CM
FAU - Crane, S M
AU - Crane SM
FAU - Cundey, J
AU - Cundey J
FAU - Kell, R G
AU - Kell RG
FAU - Marcengill, P R
AU - Marcengill PR
LA - eng
PT - Journal Article
CY - England
TA - Neuroreport
JID - 9100935
RN - 0 (Placebos)
SB - IM
MH - Animal
MH - Discrimination (Psychology)/physiology
MH - Male
MH - Placebos
MH - Rats
MH - Rats, Long-Evans
MH - Support, Non-U.S. Gov't
MH - Temporal Lobe/*physiology/surgery
MH - Visual Cortex/*physiology/surgery
MH - Visual Perception/*physiology
EDAT- 2001/12/06 10:00
MHDA- 2002/01/23 10:01
PST - ppublish
SO - Neuroreport 2001 Nov 16;12(16):3425-31.