mus. (shoulder) Flashcards Preview

deanne's - MSA (muscluoskeletal anatomy) > mus. (shoulder) > Flashcards

Flashcards in mus. (shoulder) Deck (20):
1

deltoid

o/3

i/

 

Q image thumb

o/

  • Lateral third of clavicle
  • acromion process
  • Spine of scapula

i/

  • Deltoid tuberocity of humerus

2

deltoid

a/

ant-3

post-3

mid-1

 

Q image thumb

a/

Anterior 

  • shoulder flexion,
  • internal rotation,
  • horizontal adduction

Posterior

  • shoulder extension,
  • external rotation
  • horizontal abduction

Middle

  • abduct shoulder

All work together and act on shoulder abduction

3

pectoralis major

o/3

i/1

 

Q image thumb

o/

  • Lateral third of clavicle
  • acromion process
  • Spine of scapula

i/

  • Lateral tip of bicipital groove

4

pectoralis major

a/4

 

Q image thumb

a/

  • Internally rotate shoulder
  • Adduct shoulder
  • upper (flexion of shoulder)
  • lower (extension of shoulder)

5

pectoralis minor 

o/1

i/1

Q image thumb

o/

  • Outer surface of rib 3,4 & 5

i/

  • Coracoid process of scapula

6

pectoralis minor 

a/

Q image thumb

a/

  • (Not true action) draws scapula down and forwards
  • Help adduction of scapula and downwards rotation
  •  
  • On one hand, it pulls the scapula anteriorly and inferiorly toward the ribs (abduction and depression respectively).
  • This leads to a dorsomedial movement of the inferior angle of the scapula.

7

supraspinatus

o/1

i/1

 

Q image thumb

o/

  • Superspinous fossa of scapula

i/

  • Greater tubercle of humerus

8

supraspinatus

a/1

Q image thumb

a/

  • Abduction of shoulder joint

9

infraspinatus

o/1

i/1

 

Q image thumb

o/

  • Infraspinous fossa of scapula

i/

  • Greater tubercle of humerus

10

infraspinatus

a/2

Q image thumb

a/

  • Lateral and external rotation of shoulder
  • Assists in adduction of shoulder

11

teres minor

o/1

i/1

 

Q image thumb

o/

  • Upper 2/3 of lateral border of scapula

i/

  • Lower facet of greater tubercle of humerus

12

teres minor

a/2

Q image thumb

a/

*same latissimus dorsi

 

Assist infraspinatus with

  • lateral external rotation
  • Assist adduction of shoulder

13

teres major

 

o/2

i/2

Q image thumb

o/

  • Inferior angle of scapula
  • Lower third of lateral border of scapula

i/

  • Crest of lesser tubercle
  • Medial lip of bicipital groove

14

teres major

 

a/3

Q image thumb

a/

  • Extension
  • medial rotation
  • adduction (shoulder joint)

15

latissimus dorsi

 

o/2 via

i/1

 

Q image thumb

o/

  • Spinous processes (T7-T12) via thoracolumbar fascia through (L1-L5 and posterior part of iliac crest)
  • Lower 4 ribs

i/

  • Floor of bicipital groove

16

latissimus dorsi

 

a/

Q image thumb

a/

(Same as teres major)

 

Assist infraspinatus with

  • medial/internal rotation
  •  
  • Assist adduction of shoulder​ 

17

trapezius

 

o/4

i/4

Q image thumb

o/

  • (Medial portion of) superior nuchal line
  • External occipital protuberance
  • ligamentum nuchae (covers Spinous process C1-7)
  • Spinous process (all thoracic)a

i/

Upper fibres

  • lateral portion of clavicle

Middle fibres

  • acromion process
  • spine of scapula

Lower 

  • root of spine of scapula

18

trapezius

 

a/5

Q image thumb

a/

Upper

  • bilaterally extend head and neck
  • unilaterally flex head and neck to same side and roate opposite side. Assists in elevating shoulder girdle

Middle

  • retraction of scapula

Lower

  • depress scapula

upper and lower together

  • upwards rot. of scapular

19

serratus anterior

 

o/1

i/1

 

Q image thumb

o/

  • (Outer surface of) 1st & 9th ribs

sup/ 1 and 2

intermed/ 2 and3

inferior/ 4 to 9

i/

(Anterior aspect/costal surface of) medial border of scapula

20

serratus anterior

 

a/2

 

Q image thumb

a/

  • Protract and abduct scapula
  • Depression and upwardly rotating scapula