The dorsal root ganglion is primarily composed of which type of neuron cell bodies?

The dorsal root ganglion is primarily composed of which type of neuron cell bodies?

• A. Pseudounipolar sensory neurons
• B. Bipolar sensory neurons
• C. Multipolar motor neurons
• D. Pyramidal neurons

Answer: (A)

Pseudounipolar sensory neurons form the cell bodies in the dorsal root ganglion. These neurons have a single process that divides into a peripheral branch, carrying information from sensory receptors, and a central branch that enters the spinal cord. This setup is typical of primary sensory neurons whose cell bodies lie in the dorsal root ganglia, a part of the peripheral nervous system. In contrast, multipolar motor neurons have their cell bodies in the ventral horn of the spinal cord and drive muscle activity, so they aren’t located in the dorsal root ganglion. Bipolar sensory neurons are found in specialized sensory systems like the retina or olfactory epithelium, not in DRGs. Pyramidal neurons are cortical neurons in the brain.

Pseudounipolar sensory neurons form the cell bodies in the dorsal root ganglion. These neurons have a single process that divides into a peripheral branch, carrying information from sensory receptors, and a central branch that enters the spinal cord. This setup is typical of primary sensory neurons whose cell bodies lie in the dorsal root ganglia, a part of the peripheral nervous system.

In contrast, multipolar motor neurons have their cell bodies in the ventral horn of the spinal cord and drive muscle activity, so they aren’t located in the dorsal root ganglion. Bipolar sensory neurons are found in specialized sensory systems like the retina or olfactory epithelium, not in DRGs. Pyramidal neurons are cortical neurons in the brain.