GENERAL HISTOLOGY

Detailed explanation-1: -The dorsal root ganglia (or spinal ganglia) are described as nodule-like structures found on the posterior roots of each spinal nerve, which contain the soma (or cell bodies) of the afferent sensory nerves carrying sensory signals back to the central nervous system (Figure 33.1) (Standring, 2008).

Detailed explanation-2: -They are found in the posterior (dorsal) root of spinal nerves, following the emergence of the dorsal root, that emerges from the intervertebral neural foramina. contain clusters of sensory neuron cell bodies which transmit messages relating to pain, touch, and temperature from the PNS, towards the CNS.

Detailed explanation-3: -The spinal ganglion contains the cell bodies of sensory neurons situated in the posterior root of each spinal nerve (except for spinal nerve C1). These neurons are known as first-order neurons of the somatosensory system and carry sensations related to touch, vibration, proprioception, pain and temperature.

Detailed explanation-4: -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.