Upper Limb 2 Flashcards
Axio-Appendicular muscles
extrinsic muscles attaching the upper limb to the thorax
Anterior and Posterior
Anterior
Pec Major
Pec Minor
Subclavius
Serratus Anterior
Pec Major
O
I
Innervation
Clavicular head = anterior medial shaft of clavicle
Sternal head = anterior surface of the sternum
Lateral lip of intertubercular groove
Innervation = medial and lateral pecoral
Action of Pec Major
Adducts
Medially rotates
Flexes the humerus
Can extend the humerus from an already flexed position
Pec Minor
O
I
Innervation
3rd-5th ribs
Medial border of coracoid
Medial pectoral
Action of Pec Minor
Stabilize scapula
Elevates ribs as accessory muscle
Subclavius
O
I
Innervation
Junction of first rib and manubrium
Inferior center of the clavicle
Nerve to the subclavius
Action of the subclavius
Anchor and depress the clavicle
Serratus Anterior
O
I
Innervation
Lateral parts of ribs 1-8
Medial anterior border of scapula
Long thoracic nerve
Action of Serratus Anterior
Protract
Rotate
Stabilize scapula on thorax
Posterior
Trapezius
Levator Scapulae
Rhomboideus Major and Minor
Latissimus Dorsi
Trapezius
O
I
Innervation
Occipital bone, spinous processes of C1-T12
Lateral third of clavicle, acromion, sup border of scapular spine
Accessory (CN XI)
Action of Trapezius
Elevates, retracts, rotates, and depresses the scapula
Levator Scapulae
O
I
Innervation
Transverse proc of C1 - C4
Sup angle of the scap
Dorsal scap
Action of the levator scapulae
elevate the scapula