Brodmann area 4 comprises the primary motor cortex of the human brain. Description Brodmann areas 4 The brain is viewed from the left. ... Description Brodmann areas 4 The brain is viewed from the left. ... Early work on motor cortex function Back in the 1940s, Canadian neurosurgeon Wilder Penfield wanted to know which bits of epileptics brains he could suck out without them noticing. ... In the anatomy of animals, the brain, or encephalon, is the supervisory center of the nervous system. ...
Brodmann area 4 is about the same as the precentral gyrus. The borders of this area are: the precentral sulcus in front (anteriorly), the medial longitudinal fissure at the top (medially), the central sulcus in back (posteriorly), and the lateral sulcus along the bottom (laterally). Precentral sulcus of the human brain. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ... The medial longitudinal fissure is the deep groove which separates the two hemispheres of the vertebrate brain. ... For the meaning of medial in anatomy, see anatomical terms of location. ... Central sulcus of the human brain. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ... Lateral sulcus The lateral sulcus (also called Sylvian fissure or lateral fissure) is one of the most prominent structures of the human brain. ... The term lateral can refer to: an anatomical definition of direction. ...
This area of cortex, as shown by Wilder Penfield and others, has the pattern of a homunculus. That is, the legs and trunk fold over the midline; the arms and hands are along the middle of the area shown here; and the face is near the bottom of the figure. Because Brodmann area 4 is in the same general location as primary motor cortex, the homunculus here is called the motor homunculus. Wilder Graves Penfield (January 25/26, 1891 - April 5, 1976) was a American-born Canadian neurosurgeon. ... Hartsoekers homunculus The concept of a homunculus (Latin for little man, sometimes spelled homonculus) is often used to illustrate the functioning of a system. ... Hartsoekers homunculus The concept of a homunculus (Latin for little man, sometimes spelled homonculus) is often used to illustrate the functioning of a system. ...
Fibers from the medial geniculate nucleus of the thalamus terminate in layer 4 of the primary auditory cortex (Brodmannarea 41).
Brodmannarea 42 is the auditory association cortex which probably includes among its functions the discrimination of sequences of sound patterns.
The posterior and lower portion of area 6 is known as the premotor cortex (PMC), whereas the anterior and upper portion of area 6 is known as the supplementary motor area (SMA).
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