Muscles- upper body p46-53

Question 1

sternocleidomastoid p.46

O- 2
I-1
F- 2

Answer 1

O- upper part of manubrium
-anterior medial border of clavicle

I- mastoid process of temporal bone

F- flexion of head
- lateral flexion & rotation of neck

Question 2

3 Erector spinae muscles p.47

Answer 2

spinalis- most medial
longissimus- between them
iliocostalis- most lateral

Question 3

external oblique p.49

O-1
I-2
F-3

Answer 3

O- lower body of lower 8 ribs

I- anterior 1/2 of iliac crest
-abdominal aponeurosis
-crest of pubis & linea alba

F-flexion of trunk
-lateral flexion and rotation of trunk
-tenses abdominal wall

Question 4

rectus abdominus p.49

O-1
I-1
F-2

Answer 4

O-crest of pubis

I- costal cartilage of 5th, 6th, 7th ribs

F- flexion of trunk
-tenses abdominal wall

Question 5

Trapezius p.52

O-3
I-3
F-3

Answer 5

O-nucheal line of occipital bone
-spine C1-C7
-spine T1-T12

I- posterior border, lateral clavicle
-upper surface of acromion
-upper border of scapular spine

F-upperward rotation, elevation, depression
-extension of neck
-retraction of scapula

Question 6

Infraspinatus p.53

O-1
I-1
F-3

Answer 6

O-infraspinous fossa of scapula

I-greater tubercle of humerus

F- lateral rotation of humerus
-adduction of shoulder
-stabilizes head of humerus