Which part of the brain contains a somatotopic map for motor control?
Introduction. The cerebellum has a significant role in sensory-motor control, and shows a distinct somatotopic organisation, similar to the organisation found in the motor and sensory areas of the cerebral cortex.
Does the primary motor cortex have a somatotopic map?
Functionally active regions were confined to the cortical ribbon and followed the gyral anatomy closely. These findings indicate that FMRI is capable of generating somatotopic maps of the primary motor cortex in individual subjects.
What does the somatotopic arrangement of the primary motor cortex mean?
when a specific part of the body is associated with a distinct location in the central nervous system. For example, the somatosensory cortex receives sensory information from the hands in a specific location and information from the feet in another location.
What part of the brain controls motor control?
The cerebellum is located behind the brain stem. While the frontal lobe controls movement, the cerebellum “fine-tunes” this movement. This area of the brain is responsible for fine motor movement, balance, and the brain’s ability to determine limb position.
What is meant by Somatotopic organization?
the topographic distribution of areas of the motor cortex relating to specific activities of skeletal muscles, as mapped by electrically stimulating a point in the cortex and observing associated movement of a skeletal muscle in the face, the trunk, or a limb.
Where is Somatotopic organization found?
Introduction. Somatotopic organization in the cerebral cortex, especially in the primary motor and primary somatosensory cortices, is a well-known and fundamental concept to understand the functions of these areas. Each nucleus of the basal ganglia also shows somatotopy, but it has received little attention.
How does the motor cortex control movement?
The motor cortex controls motor behaviors by generating movement-specific signals and transmitting them through spinal cord circuits and motoneurons to the muscles. Precise and well-coordinated muscle activation patterns are necessary for accurate movement execution.
How do the motor cortex and sensory cortex work together?
1 Answer. Sam S. The sensory cortex helps you process information that is picked up by your five senses. The motor cortex deals with your ability to move.
Does the primary motor cortex have a somatotopic organization?
Since the 1870s, the primary motor cortex (M1) has been known to have a somatotopic organization, with different regions of cortex participating in control of face, arm, and leg movements.
Does somatotopic organization extend to body parts?
Through the middle of the 20th century, it seemed possible that the principle of somatotopic organization extended to the detailed representation of different body parts within each of the three major representations.
What is a strict somatotopic organization of M1?
The concept of a strict somatotopic organization implied that different sites within M1 acted on their output targets relatively independently. By providing site-specific outputs to selected elements, the somatotopic map in M1 was thought to act like a piano keyboard on which higher levels of the cortex could play out motor programs.
Is M1 a point-to-point somatotopic map of the body?
When M1 was considered to contain a point-to-point somatotopic map of body parts, movements, or muscles, with each corticospinal neuron monosynaptically connected to one and only one spinal motoneuron pool, the possibility of plastic reorganization in M1 seemed remote.