These 12 pairs correspond to the middle of the back. They innervate the chest, upper back, and abdominal muscles.

: These 12 pairs run through your upper back and chest. They primarily manage the muscles of the chest wall and abdominal area, helping with posture and organ function.

A single pair at the very base of the spine providing sensory information for the skin over the tailbone. Anatomy and Function: The "Mixed" Nature

A myotome is a group of muscles primarily innervated by a single spinal nerve root. Key actions are tested to localize lesions:

: Found in the lower back, these 5 pairs are the powerhouses for your legs and feet.