anatomy upper limb muscles (incomplete)

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  1. Pectoralis Major (Clavicular Head)

    Origin
    Insertion
    Action
    Innervation
    • Origin: medial half of clavicle
    • Insertion: lateral lip of intertubercular sulcus (humerus)
    • Action: adducts and medially rotates humerus ( Machine fly exercise)
    • draws scapula anteriorly and inferiorly
    • clavicular head alone flexes humerus
    • Innervation:

    • lateral and medial pectoral nerves clavicular head C5, C6
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  2. Pectoralis Major (Sternocostal Head)

    Origin
    Insertion
    Action
    Innervation
    • Origin: anterior surface of sternum, costal cartilages 1-6
    • Insertion:
    • lateral lip of intertubercular sulcus
    • Action: adducts and medially rotates humerus
    • draws scapula anteriorly and inferiorly
    • sternocostal head alone extends humerus from flexed position
    • Innervation: sternocostal head C7 and C8, T1

    • Image Upload 2
























  3. Pectoralis Minor

    Origin
    Insertion
    Action
    Innervation
    • Origin: ribs 3-5 near Costal Cartilages
    • Insertion: Coracoid process (Not humerus)
    • Action: stabilises scapula by drawing it anteriorly and inferiorly
    • Innervation: medial pectoral nerve (C8 and T1)
    • Image Upload 3








  4. Subclavius

    Origin:
    Insertion:
    Action:
    Innervation:
    • Origin: junction of 1st rib and 1st costal cartilage
    • Insertion: inferior surface of middle third of clavicle
    • Action: anchors and depresses clavicle
    • Innervation: nerve to subclavius (C5 and C6)
    • Image Upload 4












  5. Serratus Anterior

    Origin
    Insertion
    Action
    Innervation
    • Serratus Anterior

    • Origin: lateral aspect of ribs 1-8
    • Insertion: medial border of scapula
    • Action: protract scapula,
    • rotate scapula superiorly lower fibres
    • hold scapula to thorax
    • Innervation: long thoracic nerve (C5, C6 and C7)
    • Image Upload 5











  6. Trapezius

    Origin:
    Insertion:
    Action:
    Innervation:
    • Origin: medial third of superior nuchal line
    • external occipital protuberance
    • nuchal ligament
    • spinous processes C7 - T12
    • Insertion: lateral third of clavicle,
    • acromion
    • spine of scapula
    • Action: descending part elevates scapula
    • ascending part depresses scapula
    • descending and ascending together rotate glenoid cavity superiorly
    • central fibres retract scapula
    • Innervation: spinal accessory nerve and C3-4
    • Image Upload 6








  7. Latissimus Dorsi

    Origin:
    Insertion:
    Action:
    Innervation:
    • Origin: spinous processes of T7-12, thoracolumbar fascia, iliac crest, ribs 9-12
    • Insertion: floor of intertubercular sulcus
    • Action: extends, adducts and medially rotates humerus
    • Innervation: thoracodorsal nerve (C6, C7 and C8)
    • Image Upload 7





  8. Levator Scapulae

    Origin:
    Insertion:
    Action:
    Innervation:
    • Origin: transverse processes of C1-C4
    • Insertion: medial border of scapula
    • Action: elevate scapula
    • rotate scapula inferiorly
    • Innervation: dorsal scapular nerve (C5), C3 and C4
    • Image Upload 8






  9. Rhomboid Major

    Origin
    Insertion
    Action
    Innervation
    • Origin: major: T2 - T5
    • Insertion: medial border of scapula
    • Action: retract scapula
    • rotate glenoid cavity inferiorly
    • Innervation: dorsal scapular nerve (C4 and C5)
    • Image Upload 9







  10. Rhomboid Minor

    Origin
    Insertion
    Action
    Innervation
    • Origin: C7 and T1
    • Insertion: medial border of scapula
    • Action: retract scapularotate glenoid cavity inferiorly
    • Innervation: dorsal scapular nerve (C4 and C5)
    • Image Upload 10
  11. Deltoid

    Action
    Insertion
    Action
    Innervation
    • Deltoid (there is clavicular, middle and posterior/spinal)
    • Origin: lateral third of clavicle, acromion and spine of scapula
    • Insertion: deltoid tuberosity of humerus
    • Actions:anterior fibres flex and medially rotate arm
    • posterior fibres extend and laterally rotate arm
    • all fibres are active in abduction
    • Innervation:axillary nerve (C5 and C6)
    • Image Upload 11


  12. Supraspinatus

    Origin
    Insertion
    Action
    Innervation
    • Origin: supraspinous fossa of scapula
    • Insertion: greater tubercle of humerus
    • Action: initiates abduction
    • maintains apposition of head of humerus and glenoid cavity during motion
    • Innervation: suprascapular nerve (C4, C5 and C6)
    • Image Upload 12
  13. Infraspinatus and Teres Minor

    Infraspinatus Origin:
    Teres Minor Origin
    Insertion of Both
    Action
    Innervation of Infraspinatus
    Innervation of Teres Minor
    • Infraspinatus Origin: infraspinous fossa
    • Teres Minor Origin: middle part of lateral border of scapula
    • Insertion of Both: greater tubercle of humerus
    • Action: lateral rotation of humerus
    • maintains apposition of head of humerus and glenoid cavity during motion
    • Innervation Of Infraspinatus: suprascapular nerve (C5 and C6)
    • Innervation Of Teres minor: axillary nerve (C5 and C6)
    • Image Upload 13





  14. Subscapularis

    Origin
    Insertion
    Action
    Innervation
    • Origin: subscapular fossa
    • Insertion: lesser tubercle of humerus
    • Action: medial rotation of humerus
    • maintains apposition of head of humerus and glenoid cavity during motion
    • Innervation: upper and lower subscapular nerves (C5, C6 and C7)
    • Image Upload 14





  15. Teres Major

    Origin
    Insertion
    Action
    Innervation
    • Origin: inferior angle of scapula
    • Insertion: medial lip of intertubercular sulcus of humerus
    • Actions: adducts and medially rotates humerus
    • Innervation: lower subscapular nerve (C5, C6)
    • Image Upload 15






Author
ID
29289
Card Set
anatomy upper limb muscles (incomplete)
Description
Basic anatomy, insertions, nerves etc of the upper limb (just started, haven't completed the arm down. Just the back muscles inserting into the humerus
Updated
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