Muscles functions Flashcards
Pectoralis Major
Adducts and meidially roates the upper limb
Pectoralis Minor
Stabilises the scapula by drawing it anteroinferiorlu against the thoracic wall
Serratus anterior
Rotates the scapula
Subclavius
anchors and depresses the clavicle
Trapezius
Upper fibres elevate the scapula and rotate during abduction of the arm
Middle fibres - retract the scapula
Lower scapula - pulls the scapula inferiorly
Lattisimus dorsi
Extends, adducts and medially rotates the upper limb
levatator scapulae
elevates the scapula
Rhomboids
Reatracts and rotates the scapula
Deltoid
Anterior fibres- flexion and medial rotation
Posterior fibres- extension and lateral rotation
Middle fibres- the maor abductor of the arm
Teres major
Adducts the shoulder and medially rotates the arm
Supraspinatus
Abducts the arm 0-15 and assists deltoid for 15-90 degrees
Infraspinatus
Laterally rotates the arm
Subscapularis
Medially rotates the arm
Teres minor
Laterally rotates the arm
Biceps Brachii
Supination of the forearm
Flexes the arm at the elbow and the shoulder
Coracobrachialis
Flexion of the arm at the shoulder, and weak adduction
Brachialis
Flexion at the elbow
Triceps brachii
extension of the arm at the elbow
FCU
Flexion and adduction at the wrist