Muscle Actions Flashcards
Coracobrachialis
ACTION:
Flexion/Adduction of the shoulder
Biceps brachii
Action:
Flexion of shoulder/elbow
Supination of the forearm
Deltoid
Action: All Fibers: Abduction of the shoulder Anterior fibers: Flexion/Medial rotation of the shoulder Horizontal Adduction of the shoulder Posterior: Extension/Lateral Rotation/Horizontal abduction of the shoulder
Infraspinatus
Action:
Lateral rotation/Adduction of the shoulder
Stabilizes the head of humerus
Latissimus Dorsi
Action:
Extension/Adduction/ medial rotation of the shoulder
Levator Scapula
Action:
Elevation/ Downwardly rotation of the scapula
Lateral flexion/Rotation of the neck of the same side.
Pectoralis Major
Action:
Adduction/Medial rotation (interal rotation)of the shoulder
Upper Fibers:
Flexion/ Horizontal adducrion of the shoulder
Lower Fibers:
Extension of the shoulder
Pectoralis Minor
Action:
Depression/abduction/ downwardly rotation of the scapula.
Rhomboid Major
Action:
Adduction/Elevation/ downward rotation of the scapula.
Rhomboid Minor
Action:
Adduction/Elevation/ Downward rotation of the scapula.
Serratus Anterior
Action:
Abduction/Upward rotation/Depression of the scapula.
Subclavius
Action:
Depression of the clavicle
Elevation of first rib
stabilizes the sternoclavicular joint.
Subscapularis
Action:
Medial Rotation of the shoulder
Stabilizes the head of humerus
Supraspinatus
Action:
Abduction of the shoulder
Stabilizes the head of the humerus
Teres Major
Action:
Extension/Adduction/Medial rotation of the shoulder.
