Extrinsic muscles of the shoulder Flashcards Preview

MSK > Extrinsic muscles of the shoulder > Flashcards

Flashcards in Extrinsic muscles of the shoulder Deck (19):
1

Origins of the trapezius

Skull,
ligamentum nuchae,
Spinous processes of C7-T12

2

Attachments of trapezius

Clavicle,
Acromion,
Scapula spine

3

What are the extrinsic muscles of the shoulder

Trapezius,
Latissimus dorsi,
Levator scapulae,
Rhomboid major,
Rhomboid minor

4

Action of trapezius

Upper fibres elevate scapula and rotate scapula during abduction at shoulder,
Middle fibres retract scapula,
Lower fibres pull scapula inferiorly

5

Innervation of trapezius

Accessory nerve

6

Origin of latissimus dorsi

Lower part of back

7

Attachment of latissimus dorsi

Intertubercular groove of humerus

8

Action of latissimus dorsi

Extension, adduction and medial rotation of arm

9

Innervation of latissimus dorsi

Thoracodorsal nerve

10

Origin of levator scapulae

Transverse processes of C1-4 vertebrae

11

Attachment of levator scapulae

Medial border of scapula

12

Action of levator scapulae

Elevates the scapula

13

Innervation of levator scapulae

Dorsal scapular nerve

14

Origin of rhomboid major

Spinous processes of T2-5 vertebrae

15

Attachment of rhomboid major

Medial border of scapula (between spine and inferior angle)

16

Action of rhomboid major and minor

Retracts and rotates scapula

17

Innervation of rhomboid major and minor

Dorsal scapular nerve

18

Origin of rhomboid minor

Spinous processes of C7-T1 vertebrae

19

Attachment of rhomboid minor

Medial border of scapula (level of spine)

Decks in MSK Class (87):