What structure contains the cell bodies of sensory neurons within the spinal cord?

What structure contains the cell bodies of sensory neurons within the spinal cord?

• A. Dorsal root ganglion
• B. Ventral root ganglion
• C. Spinal nerve
• D. Ganglion of spinal nerve

Answer: (A)

The dorsal root ganglion is the correct structure containing the cell bodies of sensory neurons within the spinal cord. This ganglion is located just outside the spinal cord and contains the cell bodies of the sensory neurons that transmit sensory information from the periphery (such as pain, temperature, and touch) to the central nervous system. When sensory receptors in the body detect stimuli, they send signals along the axons of these sensory neurons to the dorsal root of the spinal cord, where their cell bodies reside. This anatomical arrangement is crucial for the transmission of sensory information, making the dorsal root ganglion a key component of the sensory pathway. In contrast, the ventral root does not contain sensory neuron cell bodies; instead, it carries motor neuron axons responsible for conveying signals from the spinal cord to muscles. The spinal nerve is a mixed nerve that contains both sensory and motor fibers but does not house the cell bodies of sensory neurons. The ganglion of the spinal nerve refers to the same structure as the dorsal root ganglion but is a less precise term.

The dorsal root ganglion is the correct structure containing the cell bodies of sensory neurons within the spinal cord. This ganglion is located just outside the spinal cord and contains the cell bodies of the sensory neurons that transmit sensory information from the periphery (such as pain, temperature, and touch) to the central nervous system.

When sensory receptors in the body detect stimuli, they send signals along the axons of these sensory neurons to the dorsal root of the spinal cord, where their cell bodies reside. This anatomical arrangement is crucial for the transmission of sensory information, making the dorsal root ganglion a key component of the sensory pathway.

In contrast, the ventral root does not contain sensory neuron cell bodies; instead, it carries motor neuron axons responsible for conveying signals from the spinal cord to muscles. The spinal nerve is a mixed nerve that contains both sensory and motor fibers but does not house the cell bodies of sensory neurons. The ganglion of the spinal nerve refers to the same structure as the dorsal root ganglion but is a less precise term.