EXS 331 Exam 3: AN for Muscles Used in Breathing & Boundaries of Cubital Fossa & Movements of Thumb

diaphragm

A: pulls central tendon downward during inspiration

N: phrenic nerve

external intercostals

A: elevates ribs during inspiration

N: intercostal nerves

internal intercostals

A: draws ribs together in forced expiration

N: intercostal nerves

cubital fossa

front of elbow

lateral border of cubital fossa

brachioradialis

medial border of cubital fossa

pronator teres

base/proximal limit of cubital fossa

imaginary line through epicondyles

floor of cubital fossa

supinator & brachialis

roof of cubital fossa

bicipital aponeurosis

thumb extension

movement away from margin

flexion and hyperflexion of thumb

movement toward margin/across palm

abduction and adduction of thumb

abduction - movement away from the palm anterior-ally in the sagittal plane

adduction - bringing it back

opposition of thumb

ability to touch other digits