GROSS ANATOMY

Detailed explanation-1: -Information from the skin, skeletal muscle and joints is relayed to the spinal cord by sensory cells located in the dorsal root ganglia. The dorsal root fibers are the axons originated from the primary sensory dorsal root ganglion cells.

Detailed explanation-2: -Sensory neurons with cell bodies situated in dorsal root ganglia convey information from external or internal sites of the body such as actual or potential harm, temperature or muscle length to the central nervous system.

Detailed explanation-3: -The posterior/dorsal root contains afferent nerve fibres, which return sensory information from the trunk and limbs to the CNS. The cell bodies of the posterior root neurons are not located in the central grey matter in the spinal cord, but instead in a structure called the spinal/dorsal root ganglion.

Detailed explanation-4: -17.2. Dorsal roots contain sensory axons which carry signals into the CNS. Ventral roots contains motor axons which carry signals from CNS-originating neurons to muscles and glands (Figure 17.1).

Detailed explanation-5: -Spinal nerves are mixed nerves that interact directly with the spinal cord to modulate motor and sensory information from the body’s periphery. Each nerve forms from nerve fibers, known as fila radicularia, extending from the posterior (dorsal) and anterior (ventral) roots of the spinal cord.