Lateral rotation

Question 1

Serratus Anterior

Answer 1

O- lateral surfaces of upper 8-9 ribs and deep fascia overlying the related intercostal spaces
I- costal surface of medial border of scapula
A- protraction and lateral rotation of the scapula
I- long thoracic nerve

Keeps medial border and inferior angle of scapula opposed to thoracic wall

Question 2

Upper and Lower fibres of the trapezius

Answer 2

O- superior nuchal line and external occipital bone
medial margin of the ligament nuchae
spinous processes of C7 to T12 and the related supraspinous ligaments
I- superior edge of the crest of the spine of the scapula
acromion, posterior border of lateral 1/3 of clavicle
I- motor spinal pat of accessory nerve

Question 3

What is it produced by?

Answer 3

coricoclavicular ligament and muscles

Question 4

Range

Answer 4

inferior angle can move 10-12 cm

Question 5

What happens in lateral rotation?

Answer 5

inferior angle swings outwards and inwards
clavicle stays still
arm above head
passive rotation of the clavicle and downward movement
acromioclavicualar movement