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Premotor cortex: sensory cues and movement.

Behavioural Brain Research

|November 1, 1985

Summary

Lesioning the premotor cortex in monkeys revealed its role in directing movement, not executing it. Success depended on how instructions were received, suggesting a crucial function in movement guidance.

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Area of Science:

Neuroscience
Motor Control
Cognitive Neuroscience

Background:

The premotor cortex's precise function in motor control remains debated.
Its potential roles include movement execution and sensory guidance.

Purpose of the Study:

To investigate the role of the premotor cortex in movement execution versus sensory guidance.
To determine if premotor cortex lesions affect movement direction or performance.

Main Methods:

Monkeys underwent bilateral premotor cortex lesions.
Behavioral tests were employed, varying movement types and sensory cue reliance.
Performance was assessed based on task success and failure.

Main Results:

Monkey performance varied significantly based on task instruction methods.
Lesions did not impair the execution of axial and proximal movements.
Success was contingent on the nature of sensory guidance provided.

Conclusions:

The premotor cortex is critically involved in the direction and guidance of movement.
Evidence suggests it is not essential for the execution of motor commands.
Findings support a role in translating sensory information into motor intentions.

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