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Chapter: Human Nervous System and Sensory Organs - Spinal Cord and Spinal Nerves

Visualization of Pathways - Spinal Cord

Visualization of Pathways - Spinal Cord
The various pathway systems cannot be identified on normal transverse sections of the spinal cord.

Visualization of Pathways


The various pathway systems cannot be identified on normal transverse sections of the spinal cord. Only under special circum-stances (in experimental transection, in spi-nal cord injury, or during development when tracts become myelinated at different times), can they be distinguished from each sother, such as the late myelinating pyra-midal tract (D2). In case of injuries, distal fibers separated from the perikaryon degenerate so that their area in the spinal cord becomes visible, such as the fasciculus gracilis (E13).





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