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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.

Direct Motor Pathways

Direct Motor Pathways

The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
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...

Spinal Cord: Information Processing

Spinal Cord: Information Processing

The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...

Encoding

Encoding

Information enters the brain through encoding, which is the input of information into the memory system. Once sensory information is received from the environment, the brain labels or codes it. The information is then organized with similar information and connected to existing concepts. Encoding occurs through automatic processing and effortful processing.
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Indirect Motor Pathways

Indirect Motor Pathways

The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...

Hierarchy of Motor Control

Hierarchy of Motor Control

The hierarchy of motor control refers to the different levels of organization and processing involved in controlling movement in the body. These levels range from higher cortical areas involved in planning and decision-making to lower spinal cord reflexes that respond automatically to external stimuli.

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Related Experiment Video

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Motor Imagery Performance Through Embodied Digital Twins in a Virtual Reality-Enabled Brain-Computer Interface Environment

Motor Imagery Performance Through Embodied Digital Twins in a Virtual Reality-Enabled Brain-Computer Interface Environment

Published on: May 10, 2024

Role of motor processes in extrinsically encoding mental transformations.

Maryjane Wraga¹, Holly K Boyle, Catherine M Flynn

¹Department of Psychology, Smith College, Science Center, Bass Hall 304, Northampton, MA 01063, United States. mwraga@smith.edu

Brain and Cognition

|October 5, 2010

Summary

Imagining object and perspective rotations activates brain motor areas. The study explored how the body percept influences these mental transformations using fMRI, finding varied motor area involvement and strategy use.

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Area of Science:

Cognitive Neuroscience
Neuroimaging
Human Motor Control

Background:

Previous studies linked imagined perspective rotations to spatial and motor brain areas when using the body percept.
The role of the body percept in other mental transformations remains less understood.

Purpose of the Study:

To investigate if the body percept recruits low-level cortical motor areas during imagined object and perspective rotations.
To examine the relationship between body percept recruitment, performance, and strategy use in mental transformations.

Main Methods:

Functional magnetic resonance imaging (fMRI) was employed to monitor brain activity.
Participants performed imagined object and perspective rotations of 3D stimuli.
Button presses indicated the location of stimuli relative to the participant's perceived right and left.

Main Results:

Low-level cortical motor activation (M1) was observed for both object and perspective rotations.
The degree of M1 activation's relation to performance varied between transformation types.
Differences in the recruitment of nonmotoric strategies were also noted.

Conclusions:

The body percept contributes to low-level cortical motor activation in diverse mental transformations.
The findings suggest distinct roles for the body percept in extrinsically encoded mental transformations.
Future research should explore the nuanced interplay between body percept, motor areas, and cognitive strategies.