Cranial Nerves - Anatomy and Functions
Spinal Cord White Matter – Anatomy & Functions
- Several columns of myelinated axons surround the gray matter of the spinal cord. The lipid in the myelin makes the columns appear light in color (white matter).
- The columns are referred to as the dorsal funiculus (or posterior funiculus), lateral funiculus, and ventral funiculus (or anterior funiculus).
- A short anterior white commissure (not labeled) is also present just anterior to the gray commisure.
- The funiculi, in turn, are divided into several sensory tracts (some are called fasciculi) and motor tracts.
- Axons in the sensory tracts (and fasciculi) carry information up the spinal cord to the brain.
- Axons in the motor tracts carry information from the brain down the spinal cord.
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