Upper level: b789 Movement functions, other specified and unspecified
Sensations associated with the muscles or muscle groups of the body and their movement.
Inclusions: sensations of muscle stiffness and tightness of muscles, muscle spasm or constriction, and heaviness of muscles
Exclusion: sensation of pain (b280)
Lower livel:
b7808 Sensations related to muscles and movement functions, other specified
b7809 Sensations related to muscles and movement functions, unspecified