The anatomy of the nervous system, from the standpoint of development and function . I TB \e to aventral and a lateral corticospinal tract. The Lateral Corticospinal Tract (Crossed Pyramidal Trad, FasciculusCerebrospinalis Lateralis).—The majority of the pyramidal libers, after crossing the median plane in the decussation of the pyramids, enter the lateral fu- Cerebral hemisphere. Spinalcord Fig. 77.—Diagram of the corticospinal tracts. niculus of the spinal cord as the lateral corticospinal tract, which occupies a posi-tion between the dorsal spinocerebellar tract and the lateral fascic
The anatomy of the nervous system, from the standpoint of development and function . I TB \e to aventral and a lateral corticospinal tract. The Lateral Corticospinal Tract (Crossed Pyramidal Trad, FasciculusCerebrospinalis Lateralis).—The majority of the pyramidal libers, after crossing the median plane in the decussation of the pyramids, enter the lateral fu- Cerebral hemisphere. Spinalcord Fig. 77.—Diagram of the corticospinal tracts. niculus of the spinal cord as the lateral corticospinal tract, which occupies a posi-tion between the dorsal spinocerebellar tract and the lateral fasciculus proprius(Fig. 78). In the lumbar and sacral regions, below the origin of the dorsalspinocerebellar tract, the lateral corticospinal tract is more superficial. It canbe traced as a distinct strand as far as the fourth sacral segment; and as itdescends in the spinal cord it gradually decreases in size. Throughout itscourse in the spinal cord it gives off collateral and terminal fibers which end inthe gray matter. The ventral corticospinal tract (fasciculus cerebrospinalis anterior or directpyramidal tract) is formed by the smaller part of the corticospinal fibers, whichdo not cross in the medulla, but pass directly into the ventral funiculus of the no THE NERVOUS SYSTEM same side of the cord. They form a tract of small size, which lies near theanterior median fissure and wh
Size: 1282px × 1950px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectnervoussystem, bookye
