MOINA of Shoulder and Arm Flashcards
origin of pectoralis major
clavicle, sternum, upper six costal cartilages
insertion of pectoralis major
lateral lip of bicipital groove of humerus
nerve of pectoralis major
medial and lateral pectoral nerves from brachial plexus
action of pectoralis major
adducts the arm and roatates it medially; clavicular fibers also flex arm
origin of pectoralis minor
third, fourth, and fifth ribs
insertion of pectoralis minor
coracoid process of scapula
nerve of pectoralis minor
medial pectoral nerve from brachial plexus
action of pectoralis minor
depresses point of shoulder; if the scapula is fixed, it elevates the ribs of origin
origin of subclavius
first costal cartilage
insertion of subclavius
clavicle
nerve of subclavius
nerve to subclavius from upper trunk of brachial plexus
action of subclavius
depresses clavicle and steadies this bone during movements of the shoulder girdle
origin of serratus anterior
upper eight ribs
insertion of serratus anterior
medial border and inferior angle of scapula
nerve of serratus anterior
long thoracic nerve
action of serratus anterior
draws the scapula forward around the thoracic wall; rotates scapula
origin of trapezius
occipital bone, ligamentum nuchae, spines of seventh cervical vertebra, spines of all thoracic vertebrae
insertion of trapezius
upper fibers into lateral third of clavicle, middle and lower fibers into acromion and spine of scapula
nerve of trapezius
spinal part of accessory nerve (motor) and c3 and 4 (sensory)
action of trapezius
upper fibers elevate the scapula; middle fibers pull scapula medially; lower fibers pull medial border of scapula downward
origin of latissimus dorsi
illiac crest, lumbar fascia, spines of lower six thoracic vertebrae, lower three or four ribs, and inferior angle of scapula
insertion of latissimus dorsi
floor of bicipital groove of humerus
nerve of latissimus dorsi
thoracodorsal nerve
action of latissimus dorsi
extends, adducts, and medially rotates the arm
origin of levator scapulae
transverse processes of first four cervical vertebrae
insertion of levator scapulae
medial border of scapula
nerve of levator scapulae
c3 and 4 and dorsal scapular nerve
action of levator scapulae
raises medial border of scapula
origin of rhomboid minor
ligamentum nuchae and spines of seventh cervical and first thoracic vertebrae
insertion of rhomboid minor
medial border of scapula
nerve of rhomboid minor
dorsal scapular nerve
action of rhomboid minor
raises medial border of scapula upward and medially
origin of rhomboid major
second to fifth thoracic spines
insertion of rhomboid major
medial border of scapula
nerve of rhomboid major
dorsal scapular nerve
action of rhomboid major
raises medial border of scapula upward and medially
origin of deltoid
lateral third of clavicle, acromion, spine of scapula
insertion of deltoid
middle of lateral surface of shaft of humerus
nerve of deltoid
axillary nerve
action of deltoid
abducts arm; anterior fibers flex and medially rotate arm; posterior fibers extend and laterally rotate arm
origin of supraspinatus
supraspinous fossa of scapula
insertion of supraspinatus
greater tuberosity of humerus; capsule of shoulder joint
nerve of supraspinatus
suprascapular nerve
action of supraspinatus
abducts arm and stabilizes shoulder joint
origin of infraspinatus
infraspinous fossa of scapula
insertion of infraspinatus
greater tuberosity of humerus; capsule of shoulder joint
nerve of infraspinatus
suprascapular nerve
action of infraspinatus
laterally rotates arm and stabilizes shoulder joins
origin of teres major
lower third of lateral border of scapula
insertion of teres major
medial lip of bicipital groove of humerus
nerve of teres major
lower subscapular nerve
action of teres major
medially rotates and adducts arm and stabilizes shoulder joint
origin of teres minor
upper two thirds of lateral border of scapula
insertion of teres minor
greater tuberosity of humerus; capsule of shoulder joint
nerve of teres minor
axillary nerve
action of teres minor
laterally rotates arm and stabilizes shoulder joint
origin of subscapularis
subscapular fossa
insertion of subscapularis
lesser tuberosity of humerus
nerve of subscapularis
upper and lower subscapular nerves
action of subscapularis
medially rotates arm and stabilizes shoulder joint
origin of long head of biceps brachii
supraglenoid tubercle of scapula
insertion of long head biceps brachii
tuberosity of radius and bicipital aponeurosis into deep fascia of forearm
nerve of long head biceps brachii
musculocutaneous nerve
action of long head biceps brachii
supinator of forearm and flexor of elbow joint; weak flexor of shoulder joint
origin of short head biceps brachii
coracoid process of scapula
insertion of short head biceps brachii
tuberosity of radius and bicipital aponeurosis into deep fascia of forearm
nerve of short head biceps brachii
musculocutaneous nerve
action of short head biceps brachii
supinator of forearm and flexor of elbow joint; weak flexor of shoulder joint
origin of coracobrachialis
coracoid process of scapula
insertion of coracobrachialis
medial aspect of shaft of humerus
nerve of coracobrachialis
musculocutaneous nerve
action of coracobrachialis
flexes arm and also process of weak adductor
origin of brachialis
front of lower half of humerus
insertion of brachialis
coronoid process of ulna
nerve of brachialis
musculocutaneous nerve
action of brachialis
flexor of elbow joint
origin of long head of triceps
infraglenoid tubercle of scapula
origin of lateral head of triceps
upper half of posterior surface of shaft of humerus
origin of medial head of triceps
lower half of posterior surface of shaft of humerus
insertion of long, lateral, and medial head of triceps
olecranon process of ulna
nerve of long, lateral, and medial head of triceps
radial nerve
action of long, lateral, and medial head of triceps
extensor of elbow joint
