Master Typical Spinal Nerve | Upper Limb Lower Limb A typical spinal nerve is a mixed nerve, meaning it contains both sensory and motor fibers, that connects the spinal cord to the rest of the body. There are 31 pairs of spinal nerves, categorized into cervical, thoracic, lumbar, sacral, and coccygeal regions. Each spinal nerve originates from the spinal cord as two roots: a dorsal (sensory) root and a ventral (motor) root, which then merge to form the mixed nerve. These nerves exit the vertebra

The levator scapulae is primarily innervated by the dorsal scapular nerve, which originates from the C5 nerve root of the brachial plexus. This nerve travels deep to the muscles of the posterior neck and supplies motor innervation to the levator scapulae, along with the rhomboid major and minor. In addition to the dorsal scapular nerve, the levator scapulae also receives contributions from the ventral rami of the C3 and C4 spinal nerves. These cervical nerves provide additional innervation, aidi