Somatic sensory system and Touch perception

Somatic sensory system noun - The faculty of bodily perception; sensory systems associated with the body; includes skin senses and proprioception and the internal organs.

Touch perception and somatic sensory system are semantically related. In some cases you can replace phrase "Touch perception" with "Somatic sensory system", this phrases are similar.

Touch perception noun - The faculty of perceiving (via the skin) pressure or heat or pain.

Somatic sensory system and touch perception are semantically related. You can use "Somatic sensory system" instead a noun phrase "Touch perception".