Neck Triangles Flashcards Preview

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Flashcards in Neck Triangles Deck (30):
1

What are the borders of the posterior triangle of the neck

Posterior - trapezius
Anterior - scm
Under - middle 3rd of clavicle

2

Where is the apex of the posterior triangle

Point between scm and the trapeziusat occipital nuchal line

3

What is the roof to the posterior triangle

Investing layer of deep cervical fascia

4

What su the floor to the posterior triangle

Deep cervical fascia
Prevertebral fascia

5

What su the main contents of the posterior triangle

Spinal accessory nerve CN 11

6

Where does the spinal accessory nerve arise from

The spinal cord rather than the base of the brain like the other cranial nerves

7

What su the pathway of the spinal accessory nerve

From spinal cord loop through foramen magnum joins with vagus then split again to supply diff features

8

What does the spinal accessory do

Somatic motor innervation to scm and trapezius
Motor from anterior roots sensory posterior roots

9

How do u test the spinal accessory nerve

Scm by rotation and looking up
Trapezius by shrugging shoulders

10

What are the borders of the anterior triangle

Superior - border of mandible
Middle - midline of the neck
Sides - anterior scm

11

Where is the apex of the anterior I triangles

Jugular notch

12

What is the roof of the anterior triangle

Subcutaneous tissue and platysma

13

What is the floor to the anterior triangle

Pharynx
Larynx
Thyroid gland

14

What are the divisions of the anterior triangle

Supra hyoid - su mental and submandibular
infrahyoid - carotid and muscular

15

What flames the floor of the mouth

Mylohyoid

16

What triangle isn't dual sided

Sub mental underneath the mental protuberance

17

What are the borders of the sub mental triangle

Anterior and posterior bellies of digrastic
Hyoid bone

18

What is the floor of the su mental triangle

Mainly formed by the mylohyoid muscle

19

What are the contents of the submental triangle

Anterior jugular vein
Lymph nodes submental

20

What do the submental lymph nodes drain

Drain lymph from the tongue tip
Lower lip
Lower incisors

21

What are the contents of the submandibular triangle

Digrastic muscle
Mylohyoid
Submandibular gland
Facial artery
Facial vein
Submandibular lymph nodes
Hypoglossal nerve

22

What does the hypoglossal nerve do

Pass under the tongue so can supply all muscles of tongue intrinsic and extrinsic except palatoglosses
And then forms loop off of it which is the Ansa cerbicalis

23

What are the contents of the carotid triangle

Carotid sheath which contains internal jugular vein common carotid artery (internal) and the vagus nerve
Lymph nodes deep cervical

24

When does the common carotid artery bifurcate

At level of laryngeal prominence

25

What is the Ansa cervicalis

Made up of hypoglossal nerve
C1- motor - descendens hypoglossi
C2,3- motor - descendens cervicalis

26

What does the Ansa cervicalis do

Motor supply to strap muscles except the thyrohyoid which is solely supplied by c1

27

What are the contents of the muscular triangle

Strap muscles

28

What are the strap muscles

Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid

29

What is the innervation of the strap muscles

All innervated by Ansa cervicalis excite thyrohyoid

30

What are the neck triangles

Posterior
Anterior
- submandibular
- sub mental
- muscular
- carotid