Shoulder and Upper Arm- Origin, Insertion, Action
Name of the Muscle: Coracobrachialis Origin: Corcoid process of scapula Insertion: mid-medial surface of humerus Action: flexes and adducts arm at shoulder
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Name of the muscle: Biceps Brachii Origin: (long head)- supra glenoid tubercle of scapula (short head)- corcoid process of scapula Insertion: radial tuberosity and bicipital aponeurosis of fascia of forearm Action : flex arm at shoulder
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Name of the muscle: Brachialis Origin: anterior surface of humerus Insertion: coronoid process and tuberosity of ulna Action: flexes forearm at elbow
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Name of the muscle: Deltoid Origin: (anterior)- anterior surface of lateral clavicle (middle)- acromion process and spine of scapula (posterior)- spine of scapula Insertion: deltoid tuberosity Action: (anterior)- flexes and medially rotates arm at shoulder (middle)- abducts arm at shoulder (posterior)- shoulder abduction, extension
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Name of the muscle: Pectoralis Major Origin: clavicle, sternum, and costal cartilages of upper ribs Insertion: Intertubercular groove of humerus Action: pulls arm anteriorly and across chest, rotates humerus or adducts arm
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Name of the muscle: Pectoralis Minor Origin: sternal ends of upper ribs Insertion: coracoid process of scapula Action: pulls scapula anteriorly and downward or raises ribs
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Name of the muscle: Triceps Brachii Origin: (longhead)- infraglenoid tuberucle of scapula Insertion: olecranon process of ulna Action: extends arm at shoulder
Identify the following: muscle, origin, insertion and action
