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|Fasciculus cuneatus is 3a, in blue at upper right.|
|Latin||f. gracilis medullae spinalis|
|Gray's||subject #185 762|
|Diagram of the principal fasciculi of the spinal cord.|
The fasciculus gracilis (tract of Goll) is wedge-shaped on transverse section, and lies next the posterior median septum, its base being at the surface of the medulla spinalis, and its apex directed toward the posterior gray commissure.
It increases in size from below upward, and consists of long thin fibers which are derived from the posterior nerve roots, and ascend as far as the medulla oblongata, where they end in the nucleus gracilis. It brings in sensory impulses from lower body.
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