Shoulder Region III Flashcards Preview

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Flashcards in Shoulder Region III Deck (17):
1

serratus anterior: location

anterolateral

2

serratus anterior: origin

lateral surfaces of upper 8-9 ribs

3

serratus anterior: insertion

costal surface on medial border of scapula

4

serratus anterior: innervation

long thoracic nerve

5

serratus anterior: action

protraction and rotation of scapula

6

what causes winged scapula?

push against resistance, serratus will become prominent, if paralysed, scapula will flare backwards

7

eg. Poland syndrome

lack of pectoralis major and minor, no muscle however not too big effect -> other muscles will replace missing

8

locomotion from limb to limb called:

brachiation

9

scapular-humeral mechanism:

allow for complete 180˚ abduction, elevate arm above the head

- every 3˚ abduction, 2˚ abduction at shoulder joint, 1˚ rotation of scapula

at 120˚ abduction, greater tuberosity of humerus hits lateral edge of acromion

10

define axilla:

- clavicle
- scapula
- upper thoracic wall
- humerus
- related muscles

11

inlet of axilla:

- lateral margin of rib 1
- clavicle
- superior margin of scapula -> coracoid process

12

anterior wall of axilla:

- pectoralis major and minor
- subclavius muscle
- clavipectoral fascia

13

lateral wall of axilla:

intertubercular sulcus

14

posterior wall of axilla:

- subscapularis
- teres major and
- latissimus dorsi
- long head of triceps brachii

15

floor of axilla:

- skin of armpit
- open laterally into arm

16

medial wall of axilla:

- upper thoracic wall
- serratus anterior muscle

17

briefly list contents of axilla:

- proximal parts of biceps brachii
- axillary artery
- axillary vein
- cephalic vein
- brachial plexus
- lymph nodes
- axillary process of mammary gland