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  2. Primary motor cortex - Wikipedia

    en.wikipedia.org/wiki/Primary_motor_cortex

    Primary motor cortex is defined anatomically as the region of cortex that contains large neurons known as Betz cells, which, along with other cortical neurons, send long axons down the spinal cord to synapse onto the interneuron circuitry of the spinal cord and also directly onto the alpha motor neurons in the spinal cord which connect to the ...

  3. Motor cortex - Wikipedia

    en.wikipedia.org/wiki/Motor_cortex

    The motor cortex is the region of the cerebral cortex involved in the planning, control, and execution of voluntary movements.The motor cortex is an area of the frontal lobe located in the posterior precentral gyrus immediately anterior to the central sulcus.

  4. Brodmann area 4 - Wikipedia

    en.wikipedia.org/wiki/Brodmann_area_4

    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.

  5. Brodmann area - Wikipedia

    en.wikipedia.org/wiki/Brodmann_area

    For example, Brodmann areas 1, 2 and 3 are the primary somatosensory cortex; area 4 is the primary motor cortex; area 17 is the primary visual cortex; and areas 41 and 42 correspond closely to primary auditory cortex.

  6. Precentral gyrus - Wikipedia

    en.wikipedia.org/wiki/Precentral_gyrus

    There is a precise somatotopic representation of the different body parts in the primary motor cortex, with the leg area located medially (close to the midline), and the head and face area located laterally on the convex side of the cerebral hemisphere (cortical homunculus). The arm and hand motor area is the largest and occupies the part of ...

  7. Cortical homunculus - Wikipedia

    en.wikipedia.org/wiki/Cortical_homunculus

    A 2-D model of cortical sensory homunculus. A cortical homunculus (from Latin homunculus 'little man, miniature human' [1] [2]) is a distorted representation of the human body, based on a neurological "map" of the areas and portions of the human brain dedicated to processing motor functions, and/ or sensory functions, for different parts of the body.

  8. Betz cell - Wikipedia

    en.wikipedia.org/wiki/Betz_cell

    Betz cells (also known as pyramidal cells of Betz) are giant pyramidal cells located within the fifth layer of the grey matter in the primary motor cortex.These neurons are the largest in the central nervous system, sometimes reaching 100 μm in diameter.

  9. File:Human motor cortex.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Human_motor_cortex.jpg

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