Neck triangles Flashcards

1
Q

What are the posterior and anterior triangles split by?

A

Sternocleidomastoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the borders of the posterior triangle?

A

The anterior margin of the trapezius muscle and posterior Margin of the sternocleidomastoid and top of clavicle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is contained in the posterior triangle?

A
  • occipital artery
  • spinal accessory nerve (CN XI)
  • cervical plexus
  • External jugular vein
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What route does the spinal accessory nerve (CNXI) take?

A
  • originates from spinal cord
  • up into posterior cranial fossa
  • back into jugular foramen
  • across posterior triangle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What 3 muscles make up the floor of the posterior triangle?

A
  • splenius captius ( superior aspect)
  • levator scapulae
  • posterior,middle and anterior scalenes
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the 4 anterior triangles?

A
  • submandibular triangle
  • submental triangle
  • muscular triangle
  • carotid triangle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the borders of the anterior triangles?

A
  • inferior border of mandible

- anterior border of left and right sternocleidomastoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does the hyoid bone split?

A

Supra and infra hyoid areas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What muscle forms the floor of the mouth?

A

mylohyoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Where is the submental triangle found and what are its borders?

A
  • found below the chin

- the borders are anterior belly of digastric and the mylohyoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What does the submental triangle contain?

A
  • anterior jugular vein

- submental lymph nodes (drain lymph from tongue tip, lower lip and lower incisors)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the boundaries of the submandibular triangles?

A
  • digastric muscle

- inferior border of the mandible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What does the submandibular triangles contain?

A
  • submandibular gland
  • facial artery and vein
  • submandibular lymph nodes
  • hypoglossal nerve (CNXII)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What route does the hypoglossal nerve (CNXII) take?

A

-Exits skull via the hypoglossal canal
-descends in the neck
takes 90 degrees turn anteriorly looping around the occipital artery and enters submandibular triangle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does the hypoglossal nerve supply?

A

Motor supply to striated muscles of tongue (except palatoglossus )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the borders of carotid triangles?

A
  • posterior belly of digastric
  • anterior body of Sternocleidomastoid
  • superior belly of omohyoid
17
Q

What does the carotid sheath contain?

A
  • internal jugular vein
  • common carotid artery then internal carotid artery
  • vagus nerve
  • deep cervical lymph nodes
18
Q

Where are the internal jugular vein , vagus nerve and common carotid in relation to each other?

A
  • most lateral- internal jugular vein
  • most medial- common carotid artery
  • vagus nerve lies between
19
Q

What is the ansa cervicalis made up of and what does it supply?

A

-C1,2,3 motor fibres and supply strap muscles

20
Q

What does the muscular triangles contain?

A

strap muscles:

  • sternohyoid
  • sternthyroid
  • thyrohyoid
  • Omohyoid
21
Q

What are all 4 strap muscles enervated by and whats the exception?

A

ansa cervicalis fibres except throhyoid (C1)