rachidian /ra·chid·i·an/ (rah-kid´e-an) spinal (1).
spinal [spi´nal]
spinal [spi´nal]
1. pertaining to a spine.
2. pertaining to the vertebral column.
spinal cord that part of the central nervous system lodged in the spinal canal, extending from the foramen magnum to the upper part of the lumbar region. It is composed of an inner core of gray substance in which nerve cells predominate and an outer layer of white substance in which myelinated nerve fibers predominate. Called also medulla spinalis. (See Plates and see accompanying figures.)
Gross anatomy of the spinal cord. From Applegate, 2000.
Cross section of the spinal cord. From Applegate, 2000.
rachidial, rachidian
pertaining to the spine.
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