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Updated: May 24, 2026
09:48
Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
Published on: September 11, 2017
Single neurons in M1 and premotor cortex directly reflect behavioral interference
Neta Zach1, Dorrit Inbar, Yael Grinvald
1Biological Basis of Behavior Program, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America. nerazach@sas.upenn.edu
Plos One
|March 20, 2012
Summary
Motor learning interference occurs when tasks use the same internal model. This study shows motor cortex neural activity reflects task interference, supporting internal model division in motor learning.
Area of Science:
- Neuroscience
- Motor Control
- Cognitive Psychology
Background:
- Motor task learning can interfere, suggesting shared internal models.
- The neural basis for internal model division remains unclear.
Purpose of the Study:
- Investigate the role of motor cortex in behavioral interference.
- Determine how internal models are represented in neural activity.
Main Methods:
- Recorded single-cell activity in primate motor and premotor cortex.
- Compared neural responses to interfering (opposing visuomotor rotation) and noninterfering (visuomotor rotation + association task) learning paradigms.
Main Results:
- Noninterfering tasks showed simultaneous neural activity for both tasks.
- Interfering tasks resulted in neural activity reflecting only the second task, mirroring behavioral interference.
- Motor cortical cell representational capacity underlies behavioral interference.
Conclusions:
- Motor cortex neural activity differentiates between interfering and noninterfering motor learning.
- The representational capacity of motor cortical cells is crucial for internal model division and behavioral interference in motor learning.
Related Concept Videos
01:14Motor and Sensory Areas of the Cortex
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
01:11Direct Motor Pathways
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The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and the...
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