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Motor and Sensory Areas of the Cortex

Motor 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.

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...

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Related Experiment Video

Updated: Jun 15, 2026

Corticospinal Excitability Modulation During Action Observation

Corticospinal Excitability Modulation During Action Observation

Published on: December 31, 2013

Predicting and memorizing observed action: differential premotor cortex involvement.

Waltraud Stadler¹, Ricarda I Schubotz, D Yves von Cramon

¹Department of Psychology, Max Planck Institute for Human Cognitive and Brain Sciences, Stephanstrasse 1A, Leipzig, Germany. stadler@cbs.mpg.de

Human Brain Mapping

|March 13, 2010

Summary

This summary is machine-generated.

This study reveals how the premotor cortex aids action simulation. Specific areas, including the left pre-SMA and PMd, are crucial for simulating actions, distinguishing it from general action representation.

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Area of Science:

Neuroscience
Cognitive Neuroscience
Motor Control

Background:

The premotor cortex is implicated in action observation and simulation.
Previous research has not clearly distinguished premotor activation during action simulation versus general action representation.

Purpose of the Study:

To investigate the distinct neural mechanisms of action simulation within the premotor cortex.
To differentiate brain activation patterns for action simulation compared to other action-related cognitive tasks.

Main Methods:

Functional magnetic resonance imaging (fMRI) was employed.
A prediction task (simulating occluded actions) was compared against three control tasks with varied instructions.
Stimuli were kept consistent across conditions.

Main Results:

Right pre-SMA activation correlated with general action representation maintenance.
Left pre-SMA and left PMd showed heightened activation during the action simulation (prediction) condition.
Conjoint activation of pre-SMA and PMd was identified as a key neural driver for action simulation.

Conclusions:

The study differentiates neural correlates of action simulation from general action representation.
Specific premotor regions, notably the left pre-SMA and PMd, are vital for the internal modeling aspect of action simulation.
Findings elucidate the neural basis of action simulation within the premotor cortex.