Posterior Triangle Of The Neck

Question 1

What are the superficial structures of the anterior triangle **

Answer 1

The fascia and the platysma muscle

Question 2

What make the anterior border of the posterior triangle

Answer 2

The posterior border of sternocledomastoid

Question 3

What is the posterior border of the posterior triangle

Answer 3

The anterior border of trapezius

Question 4

What forms the base of the posterior triangle

Answer 4

The clavicle

Question 5

What is within the posterior triangle

Answer 5

External jugular vein, roots of the brachial plexus, accessory nerve and cervical and supraclavicular lymph nodes

Question 6

Where are the lateral supraclavicular, intermediate supraclavicular and medial clavicular nerves found

Answer 6

The posterior triangle

Question 7

Attachment of the SCM

Answer 7

The mastoid process and the superior nuchal line

Question 8

Motor innervation of SCM

Answer 8

Spinal accessory nerve

Question 9

Pain and proprioception of SCM

Answer 9

C2 and C3 of the cervical plexus

Question 10

What does the SCM allow

Answer 10

Lateral flexion with rotation, extension at the atlo-occipital joints, and flexion of the cervical vertebrae if the person is supine

Question 11

Parts of the trapezius

Answer 11

Ascending, transverse and decending

Question 12

Attachment of trapezius

Answer 12

Spine of the scapula

Question 13

Insertion of trapezius

Answer 13

Superior nuchal line

Question 14

Function of ascending part of trapezius

Answer 14

Depresses the scapula

Question 15

Function of transverse part of trapezius

Answer 15

Retracts the scapula

Question 16

Function of the descending part of trapezius

Answer 16

Elevation of the scapula and rotation of the glenoid cavity

Question 17

Motor innervation of trapezius

Answer 17

Accessory nerve

Question 18

Proprioception innervation of trapezius

Answer 18

C3 and C4 from the cervical plexus

Question 19

What is the floor of the posterior triangle composed of

Answer 19

Omohyoid and splenius capitis

Question 20

Function of the omohyoid

Answer 20

Depression of the hyoid bone

Question 21

Innervation of omohyoid

Answer 21

Ansa cervicalis

Question 22

Function of splenis capitis

Answer 22

Extension and rotation of the neck

Question 23

Innervation of splenis capitis

Answer 23

Dorsal rami of the middle cervical nerves

Question 24

Attachment of levator scapulae

Answer 24

The transverse process of atlas, axis and 3rd and 4th cervical vertebrae

Question 25

Insertion of levator scapulae

Answer 25

The medial scapular border between the superior angle and medial end of the scapular spine

Question 26

Function of levator scapulae

Answer 26

Control scapular position, elevates the shoulder and, if the shoulder is fixed, laterally flex the neck to one side

Question 27

Innervation of levator scapulae

Answer 27

Directly from C3-C6 via the dorsal scapular nerve

Question 28

Attachment of the anterior scalene

Answer 28

The transverse processes of C3-C6

Question 29

Insertion of anterior scalene

Answer 29

The scalene tubercle on the 1st rib

Question 30

Innervation of the anterior scalene

Answer 30

Anterior rami of C4-C7

Question 31

Attachment of the middle scalene

Answer 31

The transverse processes of C2-C7

Question 32

Insertion of the middle scalene

Answer 32

The first rib behind the groove for the subclavian

Question 33

Innervation of the middle scalene

Answer 33

Anterior rami of C3-C7

Question 34

Attachment of the posterior scalene

Answer 34

The transverse processes of C4-C6

Question 35

Insertion of the posterior scalene

Answer 35

The second rib

Question 36

Innervation of the posterior scalene

Answer 36

The anterior rami of C5-C7

Question 37

Function of the scalene muscles

Answer 37

Flex the neck (bilaterally), tilt the head to one side (unilaterally) and elevate the upper ribs