Muscles of the Upper Limb Flashcards
What are the anterior axo-appendicular muscles?
pectoralis major
pectoralis minor
subclavius
serratus anterior
what does the pectoralis minor connect?
ribs with coracoid process
what does the serratus anterior connect?
ribs to the medial border of the scapula
what is the function of the pectoralis major?
flexes, medially rotates, adducts arm
what is the function of the pectoralis minor
stabilizes the scapula
what is the function of the subclavius
depresses the clavicle
what is the function of the serratus anterior?
protracts and rotates scapula
what are the posterior axo-appendicular muscles?
trapezius
latissimus dorsi
levator scapulae
rhomboids
what is the function of the trapezius?
stabilizes, elevates, retracts, and rotates scapula
what is the function latissimus dorsi?
adducts, extends, medially rotates the arm
what is the function of the levator scapulae?
elevates scapula
what is the function of the rhomboids?
stabilize scapula
where does the latissimus dorsi insert? what does the latissimus dorsi form?
within the intertubercular sulcus, thoracolumbar fascia
what are the intrinsic shoulder muscles?
deltoid
teres major
what is the function of the deltoid?
abducts arm
what is the function of the teres major?
adducts, extends, medially rotates the arm
what are the rotator cuff muscles?
supraspinatus
infraspinatus
teres minor
subscapularis
what is the function of the supraspinatus?
initiates abduction of arm
what is the function of the infraspinatus?
laterally rotates the arm
what is the function of the teres minor?
laterally rotates arm
what is the function of the subscapularis?
medially rotates the arm
what is the axilla?
pyramid-shaped space that spans the root of the neck and arm
what forms the anterior boundary of the axilla?
subclavius, pectoralis major and minor
what forms the posterior boundary of the axilla?
scapula and subscapularis
what forms the medial boundary of the axilla?
serratus posterior and ribs
what forms the lateral boundary of the axilla?
intertubercular groove of humerus
what forms the base of the axilla?
skin and axillary fascia
what does the axilla contain?
portions of the brachial plexus
axillary artery and vein
lymph nodes
adipose
what are the anterior arm muscles?
coracobrachialis
biceps brachii
brachialis
brachioradialis
where does the brachioradialis originate on? insert on?
originates on lateral supracondylar ridge, inserts on radius
which muscle of the anterior arm is not innervated by the musculocutaneous nerve?
brachioradialis
what is the function of the coracobrachialis?
flexes and adducts arm
what is the function of the biceps brachii?
flexes and supinates forearm
what is the function of the brachialis?
flexes forearm
what is the function of the brachioradialis?
flexes forearm
what are the posterior arm muscles?
triceps brachii
anconeus
what is the function of the triceps brachii?
extends forearm
what is the function of the anconeus?
extends forearm
