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  2. Primary somatosensory cortex - Wikipedia

    en.wikipedia.org/wiki/Primary_somatosensory_cortex

    In neuroanatomy, the primary somatosensory cortex is located in the postcentral gyrus of the brain's parietal lobe, and is part of the somatosensory system. It was initially defined from surface stimulation studies of Wilder Penfield , and parallel surface potential studies of Bard, Woolsey, and Marshall.

  3. Primary sensory areas - Wikipedia

    en.wikipedia.org/wiki/Primary_sensory_areas

    The term primary comes from the fact that these cortical areas are the first level in a hierarchy of sensory information processing in the brain. This should not be confused with the function of the primary motor cortex, which is the last site in the cortex for processing motor commands. [1]

  4. Postcentral gyrus - Wikipedia

    en.wikipedia.org/wiki/Postcentral_gyrus

    Although initially defined to be roughly the same as Brodmann areas 3, 1, and 2, more recent work by Kaas has suggested that for homogeny with other sensory fields only area 3 should be referred to as "primary somatosensory cortex", as it receives the bulk of the thalamocortical projections from the sensory input fields [citation needed].

  5. Somatosensory system - Wikipedia

    en.wikipedia.org/wiki/Somatosensory_system

    The postcentral gyrus is in the parietal lobe and its cortex is the primary somatosensory cortex (Brodmann areas 3, 2 and 1) collectively referred to as S1. BA3 receives the densest projections from the thalamus. BA3a is involved with the sense of relative position of neighboring body parts and amount of effort being used during movement.

  6. Ventrobasal complex - Wikipedia

    en.wikipedia.org/wiki/Ventrobasal_complex

    [2] [3] The main output of the VB is the primary somatosensory cortex. The VB serves as the main relay for nociceptive stimuli and the modulation of that stimuli to the primary somatosensory cortex. The modulation occurs through different types of receptors present in the VB.

  7. Somatotopic arrangement - Wikipedia

    en.wikipedia.org/wiki/Somatotopic_arrangement

    This cortex is typically represented as a sensory homunculus which orients the specific body parts and their respective locations upon the homunculus. Areas such as the appendages, digits, penis, [2] and face can draw their sensory locations upon the somatosensory cortex. The areas which are finely controlled (e.g., the digits) have larger ...

  8. Sensory map - Wikipedia

    en.wikipedia.org/wiki/Sensory_map

    An example is the somatosensory map which is a projection of the skin's surface in the brain that arranges the processing of tactile sensation. This type of somatotopic map is the most common, possibly because it allows for physically neighboring areas of the brain to react to physically similar stimuli in the periphery or because it allows for ...

  9. Corticospinal tract - Wikipedia

    en.wikipedia.org/wiki/Corticospinal_tract

    The corticospinal tract is a white matter motor pathway starting at the cerebral cortex that terminates on lower motor neurons and interneurons in the spinal cord, controlling movements of the limbs and trunk. [1] There are more than one million neurons in the corticospinal tract, and they become myelinated usually in the first two years of life.