​The substantia gelatinosa is

A) ​in the dorsal horns of the spinal cord.
B) ​in the midbrain region, adjacent to the thalamus.
C) ​composed of a gelatin-like material that surrounds the lower portion of the brain.
D) ​a hypothetical structure that has not yet been confirmed.

Substantia Gelatinosa

A region in the dorsal horn of the spinal cord involved in processing pain and temperature.

Dorsal Horns

Regions in the spinal cord where sensory neurons enter and transmit signals to the brain, involved in processing touch, pain, and temperature.

Spinal Cord

A long, thin, tubular structure made up of nervous tissue, which extends from the brainstem down the back and transmits messages between the brain and the rest of the body.