What is your opinion on Homunculus

Homunculus

Homunculusm [Latin., = little human being], E.homunculus, the assignment of motor and somatosensory areas of the human cerebral cortex to body parts as an expression of the functional architecture of the cerebral cortex, which was first described by Penfield and Rasmussen in 1950. In front of and behind the central furrow one can show the exact punctual representation of the body (see fig.). One distinguishes a somatosensory homunculus on the Postcentral gyrus and one motor homunculus on the precentral gyrus. The proportions of the "little man" result from the respective biological meaning: hand and mouth together take up more than half of the area in humans. Note also the differences between the two little men. For example, there is a sensory field for teeth (toothache) and palate, but no motor equivalent for it, as the teeth cannot be moved separately. The homunculi correspond to the primary cortical fields for motor and somatosensory functions. Depending on the biological meaning, one finds such figureheads (e.g. a Rattunculus in the rat) also in other mammals whose cerebral cortex does not have a central groove. In cats and rats, for example, representation fields for the individual whiskers appear separately. Recent studies have shown that there are several central representations of somatic functions (with different "homunculi").



Homunculus

The Jasper-Penfield scheme graphically describes the homunculi in front of (left) and behind (right) the central furrow.