Option A) ventral rootlets gray.
Ventral rootlets gray structure is highlighted.
Each ventral root (also known as the ventral root, anterior base, ventral base, or motor base) is attached to the spinal cord by a series of rootlets that arise from the ventrolateral groove of the spinal cord.
These rootlets carry nerve fibers to and from the spinal cord. The dorsal root carries sensory (afferent) fibers to the spinal cord and the ventral root carries motor (efferent) fibers from the spinal cord.
The ventral root fibers are the axons of motor and visceral efferent nerves and emerge as ventral rootlets from an obscure ventrolateral sulcus. The ventral roots of individual spinal cord segments unite to form the ventral root. This ventral root contains motor axons of motor neurons and visceral motor neurons.
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