Lab Activity 11: Group IIMusclesMartini Chapter 11Portland Community CollegeBI 2312Origin and Insertion• Origin: The place where the fixed end attaches to a bone, cartilage, or connective tissue.• Insertion: The site where the movable end attaches to another structure.3• Origin: Anterior surface, lateral clavicle, acromion process and spine of scapula• Insertion: Deltoid tubercle of humerus• Action: Abducts humerus; aids in flexion, extension, and internal and external rotationDeltoid4• Origin:Supraspinous fossa• Insertion: Greater tubercle of humerus• Action: Abducts humerusSupraspinatus5• Origin:Infraspinous fossa• Insertion: Greater tubercle of humerus• Action: Rotates humerus laterallyInfraspinatus6• Origin: Axillary border of scapula• Insertion: Greater tubercle of humerus• Action: Rotates humerus laterallyTeres Minor7• Origin: Axillary border at inferior angle of scapula• Insertion:Intertubular groove of humerus• Action: Extends, adduction and medial rotates humerus. Teres Major8• Origin:Subscapular fossa• Insertion: Lesser tubercle of humerus• Action: Rotates humerus mediallySubscapularis9• Origin: Long head, supraglenoid tubercle;Short head, coracoid process scapula• Insertion: Radial tuberosity of the radius• Action: Flexes radius and humerus, and supinates forearmBiceps BrachiiShort HeadLong Head10• Origin: Coracoid process of scapula• Insertion: Middle third of humerus• Action: Flexes and adducts humerusCoracobrachialis11• Origin: Long head,infraglenoid tubercle; Lateral head, proximal portion of posterior humerus; Medial head, distal half of posterior humerus• Insertion: Olecranon process of ulna• Action: Extends humerus and ulnaTriceps Brachii Long HeadLateral Head12• Origin: Anterior distal two-thirds of humerus• Insertion: Coronoid process of ulna• Action: Flexes ulnaBrachialis13• Origin: Lateral epicondyle of humerus• Insertion: Olecranon process, posterior surface of ulna• Action: Weak extensor of ulna, stabilizes elbow joint in extensionAnconeus14• Origin: Scaphoid and trapezium• Insertion: Proximal phalanx of thumb• Action: Abducts thumb and aids in flexionPalmAbductor Pollicis Brevis15• Origin: Trapezium• Insertion: Proximal phalanx of thumb• Action: Flexes thumbPalmPalmFlexor Pollicis Brevis16• Origin: Hook of hamate• Insertion: Proximal phalanx of fifth digit• Action: Flexes fifth digitPalmPalmFlexor Digiti Minimi17• Origin: Pisiform and tendon of flexor carpi ulnaris• Insertion: Proximal phalanx of fifth digit• Action: Abducts fifth digitPalmPalmAbductor Digiti Minimi18• Origin: Medial epicondyle of humerus and coronoid process of ulna• Insertion: Middle portion of radius• Action: Pronates and flexes forearmPronator Teres Anterior, Superficial Layer19• Origin: Medial epicondyle of humerus• Insertion: Base of second metacarpal• Action: Flexes wrist and elbow and abducts wristFlexor Carpi Radialis Anterior, Superficial Layer20• Origin: Medial epicondyle of the humerus• Insertion: Palmar aponeurosis• Action: Weak flexion of wrist, tenses skin of palmPalmaris Longus Anterior, Superficial Layer21• Origin: Medial epicondyle of humerus, olecranon process, & posterior ulna• Insertion: Pisiform, hamate, and fifth metacarpal• Action: Flexes and adducts wristFlexor Carpi Ulnaris Anterior, Superficial Layer22• Origin: Medial epicondyle of humerus and coronoid process of ulna• Insertion: Middle phalanges of fingers• Action: Flexes fingers and wristFlexor Digitorum Superficialis Anterior, Middle Layer23• Origin: Anterior and medial surfaces of ulna and interosseous membrane• Insertion: Distal phalanges of fingers• Action: Flexes fingers and wristFlexor Digitorum Profundus Anterior, Deepest Layer24• Origin: Middle half of radius, interosseous membrane, coronoid process of ulna• Insertion: Distal phalanx of thumb• Action: Flexes thumb and wristFlexor Pollicis Longus Anterior, Deepest Layer25• Origin: Lateral supracondylar ridge • Insertion: Styloid process of radius• Action: Flexes forearmBrachioradialis Posterior, Superficial Layer26• Origin: Lateral supracondylar ridge of humerus • Insertion: Second metacarpal• Action: Extends and abducts handExtensor Carpi Radialis Longus Posterior, Superficial Layer27• Origin: Lateral epicondyle of humerus• Insertion: Third metacarpal• Action: Extends and abducts handExtensor Carpi Radialis Brevis Posterior, Superficial Layer28• Origin: Lateral epicondyle of humerus• Insertion: Into distal phalanx by 4 tendons• Action: Extends fingers and handExtensor Digitorum Posterior, Superficial Layer29• Origin: Lateral epicondyle of humerus and posterior border of ulna• Insertion: Fifth metacarpal• Action: Extends and adducts handExtensor Carpi Ulnaris Posterior, Superficial Layer30• Origin: Lateral epicondyle of humerus• Insertion: Extensor expansion of little finger• Action: Extends 5thdigit and handExtensor Digiti Minimi Posterior, Middle Layer31• Origin: Lateral epicondyle of humerus, supinator crest of ulna• Insertion: Lateral surface and posterior border of radius• Action: Supinates forearmSupinator Posterior, Deepest Layer32• Origin: Posterior surface of ulna and radius, and interosseous membrane• Insertion: First metacarpal• Action: Abducts thumb and handAbductor Pollicis Longus Posterior, Deepest Layer33• Origin: Middle third of radius and interosseous membrane• Insertion: Base of proximal phalanx of thumb• Action: Extends thumbExtensor Pollicis Brevis Posterior, Deepest Layer34• Origin: Middle third of ulna and interosseous membrane• Insertion: Base of distal phalanx of thumb• Action: Extends thumbExtensor Pollicis Longus Posterior, Deepest Layer35The