BRAIN
SPINAL CORD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Motor Neurons
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Sensory Neurons
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Interneurons
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None of the above
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Detailed explanation-1: -The ventral rootlets from discrete spinal cord section unite and form the ventral root, which contain motor nerve axons from motor and visceral motor neurons.
Detailed explanation-2: -The ventral root (motor root) of each spinal nerve consists of axons from motor neurons, whose cell bodies are found within the grey matter of the spinal cord. A ventral root and a dorsal root unite to form a spinal nerve, which passes outward from the vertebral canal through an intervertebral foramen.
Detailed explanation-3: -The spinal nerve contains motor and sensory nerve fibers to and from all parts of the body. Each spinal cord segment innervates a dermatome (see below and Figure 3.5). Similar cross-sectional structures at all spinal cord levels (Figure 3.1).