Lateral corticospinal tract
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| Lateral corticospinal tract | |
|---|---|
| Anterior corticospinal tract is 1a, in red at left. | |
| Decussation of pyramids. Scheme showing passage of various fasciculi from medulla spinalis to medulla oblongata. a. Pons. b. Medulla oblongata. c. Decussation of the pyramids. d. Section of cervical part of medulla spinalis. 1. Anterior cerebrospinal fasciculus (in red). 2. Lateral cerebrospinal fasciculus (in red). 3. Sensory tract (fasciculi gracilis et cuneatus) (in blue). 3’. Gracile and cuneate nuclei. 4. Antero-lateral proper fasciculus (in dotted line). 5. Pyramid. 6. Lemniscus. 7. Medial longitudinal fasciculus. 8. Ventral spinocerebellar fasciculus (in blue). 9. Dorsal spinocerebellar fasciculus (in yellow). | |
| Latin | tractus corticospinalis lateralis, fasciculus cerebrospinalis lateralis |
| Gray's | subject #185 759 |
| Dorlands/Elsevier | t_15/12816937 |
The lateral corticospinal tract (also called the crossed pyramidal tract or lateral cerebrospinal fasciculus) extends throughout the entire length of the medulla spinalis, and on transverse section appears as an oval area in front of the posterior column and medial to the posterior spinocerebellar tract.
Its fibers arise from cells in the motor area of the cerebral hemisphere of the opposite side.
They pass downward in company with those of the anterior cerebrospinal fasciculus through the same side of the brain as that from which they originate, but they cross to the opposite side in the medulla oblongata and descend in the lateral funiculus of the medulla spinalis.
[edit] External links
- NeuroNames hier-798
- GPnotebook -845545463
- Dictionary at eMedicine Lateral+corticospinal+tract
- Overview at thebrain.mcgill.ca
- Overview at neuroanatomy.wisc.edu
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