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Neuronal correlates of subjective visual perception.

N K Logothetis¹, J D Schall

¹Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge 02139.

Science (New York, N.Y.)

|August 18, 1989

Summary

Neurons in the superior temporal sulcus of monkeys reflect subjective perception of visual motion. This suggests these neurons may mediate the experience of seeing moving objects.

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Area of Science:

Neuroscience
Visual Perception
Primate Cognition

Background:

The superior temporal sulcus (STS) is a key brain region involved in visual motion analysis.
Understanding the neural basis of subjective visual perception is crucial for cognitive neuroscience.
Binocular rivalry presents conflicting visual stimuli to each eye, leading to alternating perception.

Purpose of the Study:

To investigate the relationship between neuronal activity in the monkey STS and the subjective perception of visual motion.
To determine if STS neurons encode the perceived direction of motion during binocular rivalry.

Main Methods:

Single-neuron recordings were conducted in the STS of macaque monkeys (Macaca mulatta).
Monkeys performed a visual task discriminating motion direction under conditions of binocular rivalry.
Neuronal activity was correlated with the retinal stimulus and the monkey's reported perceptual experience.

Main Results:

Activity of some STS neurons was driven solely by the retinal stimulus.
A subset of STS neurons showed activity patterns that corresponded to the monkey's reported perception of motion direction.
This dissociation suggests a role for these neurons beyond simple visual processing.

Conclusions:

Neurons within the superior temporal sulcus are involved in representing subjective visual motion perception.
These findings indicate that STS neurons may play a causal role in mediating the perceptual experience of moving objects.
The study highlights the STS as a critical area for understanding the neural correlates of conscious visual experience.

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