Driving Homoncule

See also: Homoncule

The driving homoncule indicates the organization of the driving order of the Muscle S of the human body on the surface of the Cerveau.

The Gyrus pre-exchange (or ascending Circonvolution frontal) of the cerebral Cortex is populated large pyramidal neurons, said Cellules of Betz which is the starting point of the Axone S which constitute the pyramidal Voie. This part of the cortex is the surface number 4. Throughout this surface, there exists a representation resembling a deformed human body, consisted the fact that if a point of this surface is electrically stimulated, that produced a movement in the corresponding part of the body. One speaks about Somatotopie functional. Each area of this surface 4 represents a body territory and this cortical area has a all the more large surface as the part of the body considered is more complex from the point of view of its motricity. For example, surface corresponding to the hand is very large, especially surface corresponding to the inch. This deformed representation of the human body on the surface of the driving cortex is called the homonculus of Penfield, of the name of the American neurologist Wilder Penfield (1891-1976) which discovered it.

See too

Internal bonds

sensitive Homoncule or homonculus somesthesic (cortical surfaces of the Somesthésie)

External bonds

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