What is Somatotopic representation?
Somatotopy is the point-for-point correspondence of an area of the body to a specific point on the central nervous system. This cortex is typically represented as a sensory homunculus which orients the specific body parts and their respective locations upon the homunculus.
What is the supplementary motor area involved in?
The supplementary motor area (SMA) occupies the posterior one third of the superior frontal gyrus and is responsible for planning of complex movements of contralateral extremities but ipsilateral planning to a small effect.
How does the supplementary motor area work?
Possible functions attributed to the SMA include the postural stabilization of the body, the coordination of both sides of the body such as during bimanual action, the control of movements that are internally generated rather than triggered by sensory events, and the control of sequences of movements.
Where are Somatotopic maps found?
The somatotopic map is the projection of the body surface onto a brain area that is responsible for our sense of touch and that is called the somatosensory cortex. This projection connects neurons of the cortex with touch receptors in the skin surface such that neighborhood relations are preserved.
Which part of the brain has a somatotopic organization?
The premotor cortex and supplementary motor area also contain somatotopic maps. Somatotopic representation of motor outputs in motor cortex. One might predict that the motor cortex “homunculus” arises because neurons that control individual muscles are clustered together in the cortex.
What are two regions of the brain with a somatotopic organization?
The somatotopic representation of the body and face in the postcentral gyrus and posterior paracentral lobule. The somatotopic map was developed from reports of the sensation and the location of the sensation from conscious patients whose cortices were electrically stimulated during neurosurgery.
Where is the pre supplementary motor area?
The supplementary motor area (SMA) and pre-supplementary motor area (pre-SMA) are, in humans, located on the medial aspect of the brain: in the dorsomedial frontal cortex3,14, anterior to the leg representation of the primary motor cortex (Fig.
What is the SMA basal ganglia?
The term “basal ganglia” refers to a group of several structures in the brain: the caudate nucleus, the putamen, the globus pallidus, and the subthalamic nucleus. The basal ganglia are thus thought to facilitate movement by channelling information from various regions of the cortex to the SMA.
Which part of the brain contains the Somatotopic map of the body?
cerebellum
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.
What are two regions of the brain with a Somatotopic organization?