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  2. Sensory decussation - Wikipedia

    en.wikipedia.org/wiki/Sensory_decussation

    The sensory decussation or decussation of the lemnisci is a decussation (a crossing over) of axons from the gracile nucleus and cuneate nucleus, known together as the dorsal column nuclei. The dorsal column nuclei are responsible for fine touch , vibration, proprioception and two-point discrimination .

  3. Dorsal column–medial lemniscus pathway - Wikipedia

    en.wikipedia.org/wiki/Dorsal_column–medial...

    The axons of second-order neurons of the gracile and cuneate nuclei are known as the internal arcuate fibers and when they cross over the midline, at the sensory decussation in the medulla, they form the medial lemniscus which connects with the thalamus; the axons synapse on neurons in the ventral posterolateral nucleus which then send axons to ...

  4. Medial lemniscus - Wikipedia

    en.wikipedia.org/wiki/Medial_lemniscus

    The medial lemniscus, also known as Reil's band or Reil's ribbon (for German anatomist Johann Christian Reil), is a large ascending bundle of heavily myelinated axons that decussate in the brainstem, specifically in the medulla oblongata.

  5. Medullary pyramids (brainstem) - Wikipedia

    en.wikipedia.org/wiki/Medullary_pyramids_(brainstem)

    Fibers of the posterior column, which transmit sensory and proprioceptive information, are located behind the pyramids on the medulla oblongata. The medullary pyramids contain motor fibers that are known as the corticobulbar and corticospinal tracts. The corticospinal tracts are on the anterior surface of the pyramids.

  6. Internal arcuate fibers - Wikipedia

    en.wikipedia.org/wiki/Internal_arcuate_fibers

    Upon decussation (crossing over) from one side of the medulla to the other, also known as the sensory decussation, they are then called the medial lemniscus. The internal arcuate fibers are part of the second-order neurons of the posterior column-medial lemniscus system , and are important for relaying the sensation of fine touch and ...

  7. Internal capsule - Wikipedia

    en.wikipedia.org/wiki/Internal_capsule

    The genu is the bend, or flexure in the V of the internal capsule. It is formed by fibers from the corticobulbar tract.The fibers in this region are named the geniculate fibers that carry upper motor neurons from the motor cortex to cranial nerve nuclei that mainly govern muscle motion of the head and face.

  8. Decussation - Wikipedia

    en.wikipedia.org/wiki/Decussation

    See for examples decussation of pyramids and sensory decussation. In neuroanatomy , the term chiasma is reserved for crossing of- or within nerves such as in the optic chiasm . In botanical leaf taxology , the word decussate describes an opposite pattern of leaves which has successive pairs at right angles to each other (i.e. rotated 90 degrees ...

  9. Dorsal column nuclei - Wikipedia

    en.wikipedia.org/wiki/Dorsal_column_nuclei

    Its neurons receive afferent input from dorsal root ganglia sensory neurons of the lower torso and the lower limbs. [5] The gracile nucleus and gracile fasciculus carry epicritic , kinesthetic , and conscious proprioceptive information from the lower part of the body (below the level of T6 in the spinal cord).

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