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OIA’s
| Question | Answer |
|---|---|
| What is the origin of Sternociedomastoideus? | Sternal Head-Sternum. Clavicular Head-Mastoid process of temporal |
| What is the insertion of Sternociedomastoideus? | Mastoid Process temporal |
| Action of Sternociedomastoideus | Rotates the head to opposite side, flexes neck, elevates the thorax during forced inspiration |
| Origin of Splenius Capitis | 7 cervical & 1st - 4 thoracic |
| Insertion of Splenius Capitis | Mastoid process of the temporal bone |
| Action of Splenius Capitis | Extends & hyper extends the head |
| Origin of Platysma | Pectoralis major & deltoideus |
| Insertion of Platysma | Lower margin of the mandible |
| Action of Platysma | Draws down lower lip, depresses the mandible |
| Origin of Deltoideus | Anterior - 1/3 of clavicle Middle - scapula Posterior - spine of scapula |
| Insertion of Deltoideus | Deltoid tuberosity of the humerus |
| Action of Deltoideus | Anterior - flexion and medial rotation of arm Middle - abducts the arm Extends & laterally rotates the arm |
| Origin of Pectoralis Major | Sternum to 7th rib sternal half of clavicle, external oblique muscle |
| Insertion of Pectoralis Major | Intertubercular groove of humerus |
| Action of Pectoralis Major | Adducts & medially rotates the arm, clavicular head flexes humerus, elevation of the thorax |
| Origin of Pectoralis Minor | Anterior surfaces of the 3rd-5th rib |
| Insertion of Pectoralis Minor | Coracoid process of the Scapula |
| Action of Pectoralis Minor | Draws scapula forward & downward draws the rib cage superiorly |
| Origin of Biceps Brachii | Long Head - scapula Short Head - tip of coracoid process |
| Insertion of Biceps Brachii | Radial tuberosity / flexor muscles - lower arm |
| Action of Biceps Brachii | Flexes & separates the forearm |
| Origin of Triceps Brachii | Long Head - scapula Medial Head - humerus Lateral Head - posterior surface of the humerus |
| Insertion of Triceps Brachii | Posterior surface of olecranon process of ulna |
| Action of Triceps Brachii | Extends the forearm, helps stabilize the shoulder joint |
| Origin of Pronator Teres | Humeral Head - above medial epicondyle of humerus |
| Insertion of Pronator Teres | Middle of lateral surface of radius |
| Action of Pronator Teres | Pronates the forearm & assists in flexing the elbow joint |
| Origin of Flexor Carpi Radialis | Epicondyle of the humerus |
| Insertion of Flexor Carpi Radialis | 2nd & 3rd metacarpal bones |
| Action of Flexor Carpi Radialis | Flexes wrist & abducts hand |
| Origin of Flexor Carpi Ulnaris | Humeral head - medial epicondyle of humerus Ulnar head - olecranon process & proximal 2/3 posterior border of the ulna |
| Insertion of Flexor Carpi Ulnaris | Pisiform bone |
| Action of Flexor Carpi Ulnaris | Flexes & adducts (toward) the wrist |
| Origin of Serratus Anterior | Outer surfaces & superior borders of 1st 8 or 9 ribs |
| Insertion of Serratus Anterior | Medial border of scapula |
| Action of Serratus Anterior | Abducts & protracts the scapula. (Holds scapula in place) |
| Origin of Rectus Abdominis | Pubis & pubis symphysis |
| Insertion of Rectus Abdominis | 5,6,7 ribs & xiphoid process of sternum |
| Action of Rectus Abdominis | Compresses the abdominal cavity flexes the vertebrae |
| Origin of Obliques Externus Abdominis | Lower & ribs |
| Insertion of Obliques Externus Abdominis | iliac crest |
| Action of Obliques Externus Abdominis | Compresses the abdominal cavity, laterally flexes & rotates vertebrae |
| Origin of Trapezius | 7 cervical & all thoracic vertebrae |
| Insertion of Trapezius | Clavicle, acromion process & spine of scapula |
| Action of Trapezius | Stabilizes, raises, retracts, rotates the scapula |
| Origin of Levator Scapulae | 1st -4th cervical vertebrae |
| Insertion of Levator Scapulae | Vertebral birder of the scapula |
| Action of Levator Scapulae | Raises scapula & draws it medially |
| Origin of Supraspinatus | scapula |
| Insertion of supraspinatus | Humerus & capsule of shoulder joint |
| Action of Supraspinatus | Abducts the arm |
| Origin of Infraspinatus | Fossa of scapula |
| Insertion of infraspinatus | Humerus |
| Action of infraspinatus | Lateral rotation of the shoulder (one of rotator muscles) |
| Origin of Teres Minor | Scapula |
| Insertion of Teres Minor | Humerus |
| Action of Teres Minor | Laterally rotates the arm |
| Origin of Subscapularis | Scapula |
| Insertion of Subscapularis | Humerus |
| Action of Subscapularis | Medially rotates & stabilizes the head of the humerus |
| Name 4 Rotator Cuff Muscles | Supraspinatus, Infraspinatus, Teres Minor, Subscapularis |
| Origin of Rhomboideus major | Thoracic 2-5 vertebrae |
| Insertion of rhomboideus major | Medial border of the Scapula |
| Action of Rhomboideus major | Adducts, retracts, elevates & rotates scapula |
| Origin of Rhomboideus Minor | Cervical 7 through thoracic 1 |
| Insertion of Rhomboideus Minor | Medial border if the Scapula |
| Action of Rhomboideus Minor | Retracts & stabilized the scapula & elevates the vertebral border |
| Origin of Latissimus dorsi | Lower T6 & lumbar vertebral lower 3/4 ribs & iliac crest |
| Insertion of Latissimus dorsi | Humerus |
| Action of Latissimus Dorsi | Extends adducts & medially rotates the arm draws shoulder down & backwards |
| Origin of popliteus | Lateral condyle of the Femur |
| Insertion of popliteus | Posterior surface of the Tibia |
| Action of popliteus | Rotates the knee - flexes the leg at the knee |
Created by:
Beth H
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