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Local and global perception examined by reversible suppression of temporal cortex with cold
1Department of Anatomy and Cell Biology, SUNY, Health Science Center, Syracuse 13210, USA.
Behavioural Brain Research
|December 15, 1994
Summary
The dorsal inferotemporal cortex (TEd) in monkeys processes global visual elements, not local ones. Suppressing TEd function impaired performance on stimuli requiring local element discrimination.
Area of Science:
- Neuroscience
- Cognitive Science
- Visual Perception
Background:
- The dorsal inferotemporal cortex (TEd) is implicated in visual processing.
- Understanding the role of TEd in processing compound visual stimuli is crucial.
Purpose of the Study:
- To investigate whether the dorsal inferotemporal cortex (TEd) processes global or local features of compound visual images.
- To determine the effect of TEd suppression on visual discrimination tasks.
Main Methods:
- Cryodes were used to temporarily suppress the function of the TEd in three monkeys.
- Monkeys performed a concurrent visual discrimination task using congruent, incongruent, and random image pairs.
- Performance was assessed under normal conditions and during TEd suppression.
Main Results:
- Monkeys with suppressed TEd function failed to discriminate scattered local elements.
- Performance was not impaired on global figures composed of local elements.
- This suggests TEd is critical for processing global visual information.
Conclusions:
- The dorsal inferotemporal cortex (TEd) primarily processes global visual form, not local elements.
- TEd suppression selectively impairs the perception of compound visual stimuli based on global configuration.