Back and upper limbs

Brachial plexus is comprised of

Anterior rami of Cspine nerves C5-T1

Upper limb transition points (3)

Axilla Cubital fossa Carpal tunnel

Superficial back muscles innervated by brachial plexus

Latissimus dorsi, levator scapulae, rhomboid major and minor

classify superficial, intermediate, and deep back muscles as extrinsic or intrinsic

Superficial always extrinsic, deep always intrinsic,

The extrinsic muscles of the back are innervated by

anterior rami of spinal nerves or CNXI

Largest group of intrinsic back muscles

erector spinae

The intrinsic muscles of the back are innervated by

posterior rami of spinal nerves