Triangles of the Neck

Question 1

What structure divides the neck into the anterior and posterior triangles?

Answer 1

The Sternocleidomastoid muscle

Question 2

What are the boarders of the posterior triangle?

Answer 2

Anterior- posterior boarder of the SCM
Posterior- Anterior boarder of the Trapezius
Inferior- superior boarder of the middle 1/3 of the clavicle

Question 3

What are the boarders of the anterior triangle?

Answer 3

Superior- inferior boarder of the mandible
Anterior- The anterior mid line
Posterior- anterior boarder of the SCM

Question 4

Where does the apex of the anterior triangle sit?

Answer 4

inferiority, at the jugular notch

Question 5

what forms the roof of the anterior triangle?

Answer 5

• the investing layer of the deep cervical fascia
• the superficial cervical fasia
• the Platysma

Question 6

What are the four subdivisions of the anterior triangle?

Answer 6

1) Submental triangle
2) Submandibular (Diagastric) Triangle
3) Carotid Triangle
4) Muscular Triangle

Question 7

Which of the anterior triangle subdivisions is unpaired?

Answer 7

Submental Trianlge

Question 8

The boundaries of the submental triangle…

Answer 8

1) L/R anterior bellies of the digastric muscles

2) the body of the hyoid bone

Question 9

The floor of the submental triangle…

Answer 9

the mylohyoid muscle

Question 10

what are the contents of the submental triangle?

Answer 10

minor vessels and some lymph nodes

Question 11

what is one clinical aspect of the submental triangle?

Answer 11

the lymph nodes contained here will become swollen with tongue or lip cancer.

Question 12

What are the boundaries of the submandibular triangle?

Answer 12

1) inferior boarder of the mandible
2) the anterior belly of hte digastric
3) posterior belly of the digastric

Question 13

What makes up the floor of the submandibular trianlge

Answer 13

the myohyoid and hypoglossus muslces

Question 14

what are the contents of the submandibular triangle?

Answer 14

1) submandibular salivary gland
2) internal carotid artery
3) facial artery
4) internal jugular vein
5) glossopharngeal nerve (CN IX)
6) vagus nerve (CN X)

Question 15

What is one major clinical aspect/consideration with the submandibular trianlge?

Answer 15

use caution when palpating or adjusting with contacts in this area due to the importance of the neurovascualr contents

Question 16

What are the boundries of the carotid trianlge?

Answer 16

1) posterior belly of the digastric
2) superior belly of the omohyoid
3) anterior belly of the Sternocleidomastoid

Question 17

What makes of the floor of the carotid trianlge?

Answer 17

postrions of these muscles:

1) tyrohyoid
2) hypoglossus
3) inferior constrictor
4) middle constrictor

Question 18

What are the contents of the carotid triangle?

Answer 18

1) common carotid artery
2) internal carotid artery
3) external carotid artery
4) tributaries of the external jugular vein

Question 19

What are the three branches of the eternal carotid artery that are found within the carotid triangle?

Answer 19

1) Superior Thyroid Artery
2) Lingual Artery
3) Facial Artery

Question 20

What are the boundaries of the muscular triangle?

Answer 20

1) superior belly of the omohyoid
2) anterior mid line of the neck
3) anterior boarder of the sternocleidomastoid

Question 21

what makes up the floor of the muscular triangle?

Answer 21

The posterior layer of the pretracheal fascia

Question 22

What are the contents of the muscular triangle?

Answer 22

1) sternohyoid
2) sternothyroid
3) thyroid gland
4) trachea
5) esphagus