Shoulder muscles Flashcards Preview

Upper Limb (plus back and chest wall) > Shoulder muscles > Flashcards

Flashcards in Shoulder muscles Deck (12)
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1

Deltoid

  • Origin
  • Insertion

Origin:

  • Clavicle (ant.)
  • Acromion process (post.)
  • Spine of scapula (lat.)

Insertion:

  • Deltoid tuberosity (lat. Humerus)

2

Deltoid

  • Actions
  • Innervation

                    Action(s)

  • Arm abduction
  • Flexion + medial rotation (ant.)
  • Extension + lateral rotation (pos.)

Innervation:

  •  Axillary n.
    (C5, C6)

3

Teres major

  • Origins
  • Insertion

Origin

  • Pos. inferior angle of scapula

Insertion

  • Medial bicipital groove

4

Teres Major

  • Actions
  • Innervations

Actions

  • Medial rotation  (All of arm)
  • Adduction
  • Extension

Innervation

  • Lower subscapular n.

    (C5, C6, C7)

5

SUPRASPINATUS

  • Origin
  • Insertion

 

Origin:

  • Supraspinous fossa 

Insertion:

  • Superior greater tubercle

6

SUPRASPINATUS

  • Action(s)
  • Innervation

Actions:

 

  • Arm abduction
  • Stabilises humerus

Innervation:

  • Suprascapular n. (C5, C6)

7

INFRASPINATUS

  • Origin
  • Insertion

 

Origin:

  • Infraspinous fossa

Insertion:

  • Middle greater tubercle

8

INFRASPINATUS

  • Action(s)
  • Innervation

Actions:

  • Lateral rotation of arm
  • Stabilises humerus

Innervation:

  • Suprascapular n. (C5, C6)

9

TERES MINOR 

  • Action(s)
  • Innervation

Actions:

  • Lateral rotation of arm
  • Adduction of arm

Innervation:

 

  • Axillary n. (C5, C6)

10

TERES MINOR

  • Origin
  • Insertion

Origin:

  • Lateral scapula (above teres major)

Insertion:

  • Inferior greater tubercle

11

SUBSCAPULARIS 

  • Action(s)
  • Innervation

Action:

  • Medial rotation of arm
  • Stabilises shoulder

Innervation:

  • Upper/lower subscapular n. (C5, C6, C7)

 

12

SUBSCAPULARIS

  • Origin
  • Insertion

Origin:

  • Subscapular fossa (ant.)

Innervation:

  • Lesser tubercle