TRIANGLES OF THE NECK

Question 1

borders of the anterior triangle of the neck

Answer 1

1. superior= inferior border of the mandible
2. laterally= anterior border of the sternocleidomastoid muscle
3. medially= sagittal line through the midline of the neck

Question 2

investing/superficial layer of deep cervical fascia

Answer 2

covers the roof of the triangle of the neck

Question 3

visceral triangle

Answer 3

covers the floor of the triangle of the neck

Question 4

the suprahyoid muscles are located

Answer 4

superior to the hyoid bone

Question 5

the infrahyoid muscles are located

Answer 5

inferior to the hyoid bone

Question 6

the common carotid artery bifurcates within the triangle into

Answer 6

external and internal carotid artery

Question 7

The internal jugular vein can also be found within this area – it is responsible for

Answer 7

venous drainage of the head and the neck

Question 8

The cranial nerves in the anterior triangle are the

Answer 8

1. facial nerves VII
2. glossopharyngeal IX
3. vagus nerve X
4. accessory nerve XI
5. hypoglossal nerve Xii

Question 9

suprahyoid muscles

Answer 9

1. digastric
2. stylohyoid
   3, mylohyoid
3. geniohyoid

Question 10

infrahyoid muscles

Answer 10

1. thyrohyoid
2. omohyoid
3. sternohyoid
4. sternothyroid

Question 11

the anterior triangle is subdivided by the hyoid muscle, suprahyoid, and infrahyoid muscles into four triangles

Answer 11

true

Question 12

1. carotid triangle

Answer 12

borders

1. superior= posterior belly of the digastric muscle
2. laterally= medial border of the sternocleidomastoid muscle
3. inferior= superior belly of omohyoid muscle

contents

1. external carotid artery
2. internal jugular vein
3. vagus nerve x
4. hypoglossal nerve XII

Question 13

2. submental triangles

Answer 13

situated beneath the chin

borders

1. inferior= hyoid bone
2. medially= midline
3. laterally= anterior belly of the digastric muscle

the floor of the submental triangle is formed by the mylohyoid muscle which runs from the mandible to the floor of hyoid bone

contents

A. submental lymph nodes which drain the floor of the mouth and parts of the tongue

Question 14

3. submandibular triangle

Answer 14

it is located below the body of the mandible

borders

1. superior= body of the mandible
2. anteriorly= anterior belly of the digastric muscle
3. posterior= posterior belly of the digastric muscle

contents

1. submandibular gland
2. lymph nodes
3. facial artery and vein

Question 15

4. muscular triangle

Answer 15

borders

1. superior= hyoid bone
2. medial= midline of the neck
3. superior-laterally= superior belly of the omohyoid muscle
4. infero-laterally= inferior portion of the sternocleidomastoid

contents

1. thyroid
2. parathyroid gland
3. infrahyoid muscles
4. pharynx