Spinal Cord and Nerve Roots

Diagrams of spinal cord and nerve roots. Labels: A, a small portion of the cord seen from the ventral side; B, the same seen laterally; C, a cross-section of the cord; D, the two roots of a spinal nerve; 1, anterior (ventral) fissure; 2, posterior (dorsal) fissure; 3, surface groove along the line of attachment of the anterior nerve roots; 4, line of origin of the posterior roots; 5, anterior root filaments of a spinal nerve; 6, posterior root filaments; 6’, ganglion of the posterior root; 7, 7’, the first two divisions of the nerve trunk after its formation by the union of the two roots.

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