GENERAL HISTOLOGY

Detailed explanation-1: -Substantia gelatinosa is found at all levels of the spinal cord. Located in the dorsal cap-like portion of the head of the dorsal horn, it relays pain, temperature and mechanical (light touch) information and consists mainly of column cells (intersegmental column cells).

Detailed explanation-2: -Definition. Substantia gelatinosa is a collection of cells in the gray area (dorsal horns) of the spinal cord. Found at all levels of the cord, it receives direct input from the dorsal (sensory) nerve roots, especially those fibers from pain and thermoreceptors.

Detailed explanation-3: -The substantia gelatinosa of Rolando (SGR) is a grey matter structure of the dorsal spinal cord primarily involved in the transmission and modulation of pain, temperature, and touch.

Detailed explanation-4: -…the spinal cord: (1) the dorsal horns, composed of sensory neurons, (2) the lateral horns, well defined in thoracic segments and composed of visceral neurons, and (3) the ventral horns, composed of motor neurons.

Detailed explanation-5: -The dorsal horn functions as an intermediary processing center for this information, comprising a complex network of excitatory and inhibitory interneurons as well as projection neurons that transmit the processed somatosensory information from the spinal cord to the brain.