Muscles of the trunk, pectoral girdle, upper limb

What is the action of the diaphragm muscle?

flattens leading to inhalation

What is the innervation of the diaphragm muscle?

phrenic nerve

What is the action of the external intercostals muscle?

assists respiration

What is the innervation of the external intercostals muscle?

intercostal nerves

What is the action of the internal intercostals muscle?

assists respiration

What is the innervation of the internal intercostals muscle?

intercostal nerves

What is the action of the external oblique muscle?

flexes and laterally bends trunk; compresses abdominal cavity

What is the action of the internal oblique muscle?

flexes and laterally bends trunk; compresses abdominal cavity

What is the action of the rectus abdominis muscle?

flexes trunk, compresses abdominal cavity

What is the action of the transversus abdominis muscle?

compresses abdominal cavity

What is the action of the levator scapulae muscle?

elevate scapula

What is the action of the pectoralis minor muscle?

protracts and depresses scapula

What is the action of the rhomboid major and minor muscle?

retract scapula

What is the action of the serratus anterior muscle?

protracts scapula

What is the action of the trapezius muscle?

Superior: elevates scapula, Middle: retracts scapula, Inferior: depresses scapula

What is the action of the coracobrachialis muscle?

flexes and adducts arm

What is the origin of the coracobrachialis muscle?

scapula (coracoid process)

What is the insertion of the coracobrachialis muscle?

humerus

What is the action of the deltoid muscle?

abducts arm

What is the origin of the deltoid muscle?

scapula and clavicle

What is the insertion of the deltoid muscle?

humerus

What is the action of the infraspinatus muscle?

stabilizes shoulder joint

What is the origin of the infraspinatus muscle?

scapula (infraspinous fossa)

What is the insertion of the infraspinatus muscle?

humerus

What is the action of the latissimus dorsi muscle?

adducts and extends arm

What is the origin of the latissimus dorsi muscle?

ilium and vertebrae

What is the insertion of the latissimus dorsi muscle?

humerus

What is the action of the pectoralis major muscle?

flexes and adducts arm

What is the action of the subscapularis muscle?

adduct arm, stabilizes shoulder joint

What is the origin of the subscapularis muscle?

scapula (subscapular fossa)

What is the insertion of the subscapularis muscle?

humerus

What is the action of the supraspinatus muscle?

abducts arm, stabilizes shoulder joint

What is the origin of the supraspinatus muscle?

scapula (supraspinous fossa)

What is the insertion of the supraspinatus muscle?

humerus

What is the action of the teres major muscle?

adducts and extends arm

What is the origin of the teres major muscle?

scapula

What is the insertion of the teres major muscle?

humerus

What is the action of the teres minor muscle?

stabilizes shoulder joint

What is the origin of the teres minor muscle?

scapula

What is the insertion of the teres minor muscle?

humerus

What is the action of the biceps brachii muscle?

flexes the elbow

What is the origin of the biceps brachii muscle?

scapula

What is the insertion of the biceps brachii muscle?

radius

What is the action of the brachialis muscle?

flexes the elbow

What is the origin of the brachialis muscle?

humerus

What is the insertion of the brachialis muscle?

ulna

What is the action of the brachioradialis muscle?

flexes the elbow

What is the origin of the brachioradialis muscle?

humerus

What is the insertion of the brachioradialis muscle?

radius

What is the action of the triceps brachii muscle?

extends the elbow

What is the origin of the triceps brachii muscle?

scapula and humerus

What is the insertion of the triceps brachii muscle?

ulna