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Visual pathways supporting perception and action in the primate cerebral cortex

¹Department of Psychology, University of Western Ontario, London, Canada.

Current Opinion in Neurobiology

|August 1, 1993

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The ventral and dorsal streams of primate visual processing have distinct roles. New evidence suggests the ventral stream handles object perception, while the dorsal stream controls skilled actions.

Area of Science:

Neuroscience
Primate Visual Processing
Cognitive Neuroscience

Background:

The primate visual system is broadly divided into ventral and dorsal streams.
The precise functional division of labor between these streams remains debated.
Previous research has proposed various roles for each stream.

Purpose of the Study:

To propose a new interpretation of the functional division of labor between the ventral and dorsal streams of visual processing.
To differentiate the roles of the ventral and dorsal streams in visual information processing.

Main Methods:

Behavioral experiments were conducted.
Electrophysiological recordings were utilized.
Data were analyzed to infer stream functions.

Related Experiment Videos

Main Results:

Behavioral and electrophysiological evidence supports a distinct functional specialization.
The ventral stream is implicated in object perception.
The dorsal stream is implicated in the on-line control of skilled actions.

Conclusions:

The ventral stream mediates the perception of objects.
The dorsal stream mediates the on-line control of skilled actions directed at those objects.
This division of labor offers a new framework for understanding visual processing streams.