Extrinsic Layer- Superficial Muscle Group

S: large, diamond; 3 parts

L: back, most superficial

• FD: upper: inferlateral
• middle: horizontal
• inferior: superolateral

A: occipital, cervical

S: large fan-shaped

L: lower back half; upper portion- deep to trapezius

FD: superolateral

A: lower back half, upper portion- deep to trapezius

S: pair, strap-like

L: lie deep to trapezius

FD: inferior

A: cervical spine and scapulae

S: 2 pairs, broad bands

L: deep to traps; major are 3-4 times as wide as minor

FD: inferolateral

A: thoracic spine and scapulae