Front | Back |
Sternocleidomastoid
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Action: ROTATION and flexion of head origin: sternum, clavicle Insertion: Mastoid process of temporal bone |
Rectus abdominis
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Action:flexion of trunk origin:superior edge of pubis Insertion:costal cartilages of ribs 5-7 xiphoid process |
External obique
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Action:lateral flexion of trunk, stabilization of spine origin: ribs 5-12 Insertion: linea alba: iliac crest |
Trapezius
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Action:elevates, rotates, retracts scapula extension of head origin:occipital bone, spinous processes of vertebrae c7 to T12 Insertion:clavicle, acromion and spine of scapula |
Serratus Anterior
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Action: holds scapula against chest, rotates scapula and draws it forward origin: superior edge of ribs 1-8 Insertion: anterior edge of superior angle vertebral boarder and inferior angle of scapula |
Pectoralis Major
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Action:flexes adducts and rotates upper arm origin:clavicle sternum, and costal cartilages of ribs 2-6 Insertion:greater tubercle of humerous |
Latissimus dorsi
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Action: extends abducts and medially rotates upper arm origin: spinous processes of vertebrae T6-L5 sacrum, iliac cres and ribs 10-12 Insertion:intertubercular groove of humerous |
Deltoid
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Action: major abductor of upper arm origin: clavicle, acromion, spine of scapula Insertion: deltoid tuberosity |
Supraspinatus
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Action: abducts upper arm, hold arm in glenoid origin: supraspinous fossa of scapula Insertion: greater tubercle of humerus |
Infraspinatus
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Action: lateral rotation of arm holds arm in glenoid origin: infraspinous fossa of scapula Insertion: |
Teres Major
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Action: extends, adducts and medially rotates arm origin: Posterior surface of inferior angle of scapula Insertion: Margin of lesser Tubercle of humerous |
Biceps Brachii
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Action: flexes forearm origin: coracoid process of scapula tuberosity above glenoid fossa Insertion: radial tuberosity of radius |
Brachioradialis
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Action: flexes forearm origin: lateral epicondyle of humerous Insertion: distal end of radius |
Triceps Brachii
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Action: extends the forearm origin: below glenoid fossa top end of back of humerous Lower 2/3 of back of humerous Insertion: olecranon of ulna |
Pronator Teres
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Action: pronation of forearm origin: medial epicondyle of humerous coronoid process of ulna Insertion: Middle of radius |