What is the motor homunculus?
Motor homunculus is a representative map of neurological connections. The motor homunculus focuses on motor processing of the neurological system. The primary motor cortex plays an important role in motor homunculus. The motor cortex mainly concerns the signals transmitting through the frontal lobes.
What is the cortical homunculus?
In neuroanatomy, the cortical homunculus is either the motor or sensory distribution along the cerebral cortex of the brain. It was discovered by the great scientist ‘Wilder Penfield and Edwin Boldrey in the year 1937. It is a map that corresponds body part to touch sensitivity.
Why does the homunculus represent variation in size?
That is why the homunculus represents variation in sizes as it extends over the cortex. The face and mouth region are near the Sylvian fissure. The arm and the hand area are at the midportion of the primary motor cortex. The trunk is near the apex of the brain.
Why is the motor homunculus important?
The motor homunculus represents various sizes. The main reason for this is that the motor receptors of various parts of the body differ in size and density. Thus, the map would depict various size connections in relation to motor processing of the neurological connections.
What is motor and sensory homunculus?
Motor and sensory homunculus are imaginary maps drawn by taking the neurological connections into consideration. Both have varying densities due to the change in structure. They take the brain, spinal cord and nerves into consideration. They can be divided into Brodmann’s areas.
What is the difference between a motor and sensory homunculus?
The motor homunculus focuses on motor processing, while the sensory homunculus focuses on sensory processing. Also, another difference between motor and sensory homunculus is the pathway in which the signals arrive for ...
Why do the densities of the sensory homunculus vary?
It is mainly because different parts vary in size and in density.
What is the homunculus?
Homunculus is an imaginary map generated on the data available on the different neurological connections. It mainly involves the brain, sensory processing and motor processing. Furthermore, nerves and the spinal cord also play an important role in generating the homunculus.
Where is the sensory homunculus located?
The signals for the sensory homunculus arrive from the thalamus to the primary sensory cortex. The sensory cortex is situated at the posterior side of the central sulcus. It also extends to the Sylvian fissure.
