Differences
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spinal_cord_tracts [2025/07/01 06:52] – administrador | spinal_cord_tracts [2025/07/01 06:53] (current) – administrador | ||
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^ No. ^ Pathway | ^ No. ^ Pathway | ||
- | | 1 | Anterior corticospinal tract | Skilled movement | + | | 1 |
- | | 2 | Medial longitudinal fasciculus | + | | 2 |
- | | 3 | Vestibulospinal tract | Facilitates extensor muscle tone | Same | Critical for posture and balance; acts on axial and extensor muscles. | | + | | 3 |
- | | 4 | Medullary (ventrolateral) reticulospinal tract | Automatic respiration? | + | | 4 | Medullary (ventrolateral) |
- | | 5 | Rubrospinal tract | Facilitates flexor muscle tone | Same | Minimal role in humans; more relevant in quadrupeds. May support fine motor adjustment. | | + | | 5 |
- | | 6 | Lateral corticospinal (pyramidal) tract | Skilled voluntary movement | + | | 6 | Lateral corticospinal ([[pyramidal]]) [[tract]] | Skilled voluntary movement |
*The terminal fibers of this uncrossed tract usually cross in the anterior white commissure to synapse on alpha motor neurons or on internuncial neurons. A minority of the fibers do remain ipsilateral. Also, an anterior corticospinal tract is easily identified only in the cervical and upper thoracic regions. | *The terminal fibers of this uncrossed tract usually cross in the anterior white commissure to synapse on alpha motor neurons or on internuncial neurons. A minority of the fibers do remain ipsilateral. Also, an anterior corticospinal tract is easily identified only in the cervical and upper thoracic regions. |