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Flashcards in Dissection 11 Deck (30):
1

What are the 3 parts of the deltoid muscle?

posterio (spinal); middle (acromial) and anterior (clavicular)

2

What is the function of the spinal part of the deltoid?

extension at the shoudler

3

What is the function of the acromial part of deltoid?

abduction at shoulder- taking over from supraspinatous beyond 15 degrees)

4

What is the function of the clavicular part of deltoid?

mainly flexion at shoulder

5

What does the ascedning part of trapezius do?

scapular depression

6

what is the function of the middle part of trapezius?

retraction

7

What is the function of the descending part of trapezius?

elevation

8

What do the ascending and descending parts of trapezius work together to do?

superior rotation of glenoid fossa

9

What is the function of levator scapulae?

elevation of scapula and inferior rotation of glenoid fossa

10

What do rhomboid major and minor do?

retraction of scapula and inferior rotation of glenoid fossa

11

What are the rotator cuff muscles?

SITS-
Supraspinatus
Infrapsinatus
Teres minor
Subscapularis

12

What is the function of supraspinatus?

first 15 degrees of abduction at hsoulder

13

What is the function of infraspinatus and teres minor?

stabilise head of humerus in glenoid/lateral rotation at shoulder

14

What is the function of subscapularis?

stabilise head of humerus in glenoid/medial rotation at shoulder

15

What is the function of teres major?

adduction/medial rotation at shoulder

16

What does the deltoid muscle do when all parts of the muscle work together?

abduction of the shoulder joint

17

What is needed for the full abduction and adduction of the arm?

the scapula most rotate so that the glenoid fossa moves- superiorly for abduction and ineriorly for adduction

18

Why are the SITS muscles named the rotator cuff?

the distal tendons blend and reinforce the fibrous capsule of the shoulder joint

19

What is the pupose of the rotator cuff?

stabilises the shallow ball and socket joitn

20

What is the distal insertion of supraspinatus, infraspinatus and teres minor?

greater tubercle of the humerus

21

What is the distal attachment of the subscapularis?

lesser tubercle of the humerus

22

What is foudn in the deep aspect of trapezius muscle?

spinal accessory nerve

23

What are the muscles deep to trapezius from superior to infeior?

levator scapulae; rhomboid minor ; rhomboid major

24

What do the muscles deep to trapezius attach to?

medial border of the scapula and the spinous process of cervical and upper thoracic vertebrae

25

What nerve supplies the deltoid musce?

axiallry

26

What is the proximal attachment for subscapularis?

subscapular fossa

27

What is the proximal attachment for infraspinatous?

infraspinatous foss

28

What is the prox. attahcment for supraspinatous fossa?

supraspinatous fossa

29

What is the proximal attachment for teres minor?

middle part of lateral border of shoulder

30

What causes painful arc syndrome?

impingement of supraspinarous endon between the humerus and acromion process which will cause pain during abduction