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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...

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Related Experiment Video

Updated: Mar 27, 2026

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation

Published on: February 23, 2020

Spatio-Temporal Patterning in Primary Motor Cortex at Movement Onset.

Matthew D Best¹, Aaron J Suminski^2,3, Kazutaka Takahashi²

¹Committee on Computational Neuroscience.

Cerebral Cortex (New York, N.Y. : 1991)

|January 14, 2016

Summary

This summary is machine-generated.

Movement initiation involves precise spatial and temporal activation of motor cortex neurons. Beta oscillations in the primary motor cortex show a spatial gradient, guiding neuron engagement for voluntary movement.

Keywords:

local field potentials movement initiation sequential engagement spatio-temporal patterning

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Area of Science:

Neuroscience
Motor Control
Computational Neuroscience

Background:

Voluntary movement initiation engages widespread motor cortical neurons.
The spatial organization of these neural dynamics across the cortex is not well understood.

Purpose of the Study:

To investigate the spatial structure of motor cortical dynamics during movement initiation.
To determine if spat-temporal patterns in neural activity correlate with movement onset.

Main Methods:

Recorded local field potential (LFP) oscillations in the primary motor cortex (MI) of rhesus macaques.
Analyzed the timing of beta frequency LFP attenuation as a marker of cortical activation.
Examined the engagement order of neuronal ensembles in MI.

Main Results:

A spatial gradient in the timing of beta LFP attenuation was observed across the primary motor cortex.
These spat-temporal dynamics in LFP activity were mirrored in the sequential engagement of MI neuron ensembles.
The observed patterns were specific to the period of movement onset.

Conclusions:

Movement initiation is characterized by a distinct spat-temporal activation sequence in the primary motor cortex.
This precise neural activation pattern is crucial for initiating voluntary movements.
Findings suggest a spatially organized process underlying movement initiation in the motor cortex.