Week 10 Scapulohumeral and anterior arm muscles PALP edit

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daaronryan
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227770
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Week 10 Scapulohumeral and anterior arm muscles PALP edit
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2013-08-05 10:19:42
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CCMH RA week 10
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scapulohumeral and anterior Fore arm muscles PALP edit
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  1. Rotator Cuff Group
  2. Supraspinatus
    O: Supraspinous fossa of scapula

    F.D: lateral

    I: Greater tubercle of humerus (superior facet) 

    • A: 1st 15 degrees of arm abduction +
    • stabilize humerus

    N: Suprascapular nerve

    • S:Part of the rotator cuff muscle
    • group
  3. Infraspinatus
    O:Infraspinous fossa of scapula

    F.D: superior lateral

    I:Greater tubercle of humerus (middle facet)

    A: Lateral rotation + stabilize humerus

    N: Suprascapular nerve

    • S: part of rotator cuff
  4. Teres minor
    O: Middlepart of lateral border of scapula

    F.D: superior lateral

    I: Greater tubercle of humerus (inferior facet) 

    A: Laterally rotate + stabilize humerus

    N: Axillary nerve

    • S: part of rotator cuff muscles
  5. Subscapularis
    O:Subscapular fossa of scapula

    F.D:

    I:Lesser tubercle of humerus (middle facet)

    A:Medial rotation of humerus + stabilize shoulder

    N:Upper and lower subscapular nerves

    • S: part of rotator cuff muscles
  6. Teres Major
    O: Inferior angle of the scapula

    F.D: superior lateral and anterior

    • I: Crest of the lesser tubercle
    • (Medial lip of the intertubercular groove)

    • A: Extension, adduction and internal
    • rotation of the humerus

    N: Lower subscapular nerve

    S: works with LD

    This muscle has the same action as Latissimus Dorsi

    • “Lats little helper”
  7. Deltiod
    • O: Inferior surface of the lateral
    • 1/3 of clavicle, acromion and spine of scapula

    F.D: inferior

    I: Deltoid tuberosity

    • A: All fibers abduct the shoulder,
    • past 15 degrees

    N: Axillary nerve

    S:

    Actions:

    Three groups of muscle fibers (anterior, middle, posterior) 

    Anterior Fibers: Flex and medially rotate humerus  

    Middle Fibers: Abduct humerus

    Posterior Fibers: Extend and laterally rotate humerus

  8. Coracobrachialis
    • O: Tip of coracoid process of
    • scapula

    F.D: inferior lateral

    • I: Middle 1/3rd of medial surface of
    • humerus

    • A: Helps flex and adduct the arm;
    • resists shoulder dislocation

    N: Musculocutaneous nerve

    S:

    This muscle is located between the muscle belly of Biceps Brachii anteriorly and Triceps Brachii posteriorly.

  9. Biceps Brachii
    O:

    Short Head: Tip of coracoid process

    • Long Head: Supraglenoid tubercle            of
    • scapula

    F.D: inferior

    I: Tuberosity of radius and bicipital aponeurosis

    A: Supinates forearm, flexes forearm,  flexes arm, resists dislocation of shoulder

    N: Musculocutaneous nerve

    S:

    Main supinator of the forearm

  10. Brachialis
    • O: Distal half of anterior surface
    • of humerus

    F.D:inferior

    • I: Coronoid process and tuberosity
    • of ulna

    A: Flexes forearm in all positions

    N: Musculocutaneous and Radial nerve

    • S:Located deep to Biceps Brachii
  11. Triceps Brachii
    • O:
    • Long Head: Infra-glenoid tubercle

    Lateral Head: Posterior surface of humerus, superior to radial groove

    Medial Head:Posterior surface of humerus, inferior to radial groove

    F.D: inferior

    • I: Proximal end of olecranon and
    • fascia of forearm

    • A: Chief extensor of the forearm,
    • long head resists dislocation, especially during adduction

    N: Radial nerve

    S:

  12. Pronator Teres
    • O:
    • Ulnarhead – Coronoid process
    •  
    • Humeral head – Medial epicondyle of humerus (common flexor tendon)

    F.D: inferior lateral

    • I: Middle third of lateral surface
    • of radius

    • A: Pronates and flexes forearm (at
    • elbow)

    N: Median nerve

    • S: Found in the 1st layer of anterior forearm muscles and lateral to FCR.
  13. Flexor Carpi Radialis -  FCR
    O: Medial epicondyle of humerus (common flexor tendon)

    F.D: inferior lateral

    I: Base of 2nd metacarpal

    • A: Flexes and abducts hand (at
    • wrist)

    N: Median nerve

    • S: Found in the 1st layer of anterior forearm muscles and between Pronator Teres
    • and Palmaris Longus

  14. Palmaris Longus
    O: Medial epicondyle of the humerus

    F.D:inferior

    • I: Distal half of flexor retinacumlum and
    • palmar aponeurosis

    • A: Flexes hand at wrist, tightens
    • palmar  aponeurosis

    N: Median nerve

    • S:Found in the 1st layer of anterior
    • forearm muscles and between FCR and FCU

  15. Flexor Carpi Ulnaris - FCU
    • O:
    • Humeral Head– Medial epicondyle of    humerus (common flexor tendon)

    Ulnar head – Olecranon and posterior   border (via aponeurosis)

    F.D: inferior

    • I: Pisiform, Hook of hamate, 5th
    • metacarpal

    • A: Flexes and adducts hand (at
    • wrist)

    N: Ulnar nerve

    • S:Found in the 1st layer of anterior
    • forearm muscles and medial to Palmaris Longus
  16. Flexor Digitorum Superficialis - FDS
    • O:
    • Humeroulnar head – Medial epicondyle and coronoid process of the ulna

    Radial head – Superior half of anterior radius

    F.D: inferior

    • I: Shafts of middle phalanges of
    • medial four digits

    • A: Flexes middle phalanges of PIP
    • joints of middle 4 digits, also flexes MCP joints with stronger action.

    N: Median nerve

    • S: only muscle in the intermediate layer of anterior forearm muscles 
  17. Flexor Digitorum Profundus
    • O: Proximal ¾ of medial and anterior
    • surface of ulna and interosseous membrane

    F.D: inferior

    • I: Bases of distal phalanges of 2nd,
    • 3rd, 4th and 5th digits

    • A: Flexes distal phalanges 2-5 at
    • DIP joint.

    N: Ulnar nerve /Anterior interosseous nerve (branch of Median nerve)

    S: Found in the 3rd (deep) layer of anterior forearm muscles 

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