Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Anatomy Block 3 > posterior triangle > Flashcards

posterior triangle Flashcards

(50 cards)

Start Studying
1
Q

innervation to the back of scalp and back of neck

A

-dorsal rami of spinal nerves C2-C5

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

innervation of skin of anterior and lateral aspects of the neck

A

-ventral rami of C2-C4 via cutaneous branches of the cervical plexus

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

cutaneous branches of the cervical plexus

A
  • lesser occipital nerve
  • greater auricular nerve
  • transverse cervical nerve
  • supraclavicular nerve
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

lesser occipital nerve

A
  • C2,C3

- supplies skin over lateral part of occipital region and upper part of medial surface of auricle

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

greater auricular nerve

A
  • C2,C3

- supplies to skin over angle of the mandible and parotid gland, and lower part of the auricle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

transverse cervical nerve

A
  • C2,C3

- anterior and lateral aspects of the neck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Supraclavicular nerve

A
  • C3,C4
  • divides into medial, intermediate, and lateral supraclavicular nerves
  • supplies skin at base of neck and pectoralis major and deltoid muscles
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Platysma

A

-thin muscle embedded in superficial fascia
Origin: deep fasica that covers pectoralis major and deltoid
Insertion: lower border of body of mandible and angle of mouth

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

Platysma nerve supply

A

-cervical branch of the facial nerve (CNVII)

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

Platysma action

A
  • tenses skin of neck
  • depress mandible
  • draws down lower lip
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what makes the external jugular vein?

A

union of posterior auricular vein and posterior branch of retromandibular vein

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

posterior auricular vein

A

-drains scalp posterior and superior to auricle

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

retromandibular vein

A
  • union of superficial temporal and maxillary veins
  • divides into anterior and posterior branches
  • anterior branch joins facial nerve
  • posterior branch: makes external jugular vein
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

tributaries of external jugular vein

A
  • transverse cervical
  • suprascalpular
  • anterior jugular veins
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Anterior jugular vein

A
  • union of several small veins
  • drains into external jugular vein
  • often joined by jugular venous arch
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

sternocleidomastoid origin and insertion

A

origin: anterior surface of manubrium of sternum and superior surface of medial third clavicle
insertion: mastoid process and lateral part of superior nuchal line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

sternocleidomastoid nerve supply

A
  • accessory nerve(motor)

- branches fro ventral rami of C2 and C3 spinal nerves(sensory)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

sternocleidomastoid divides what?

A

divides anterolateral part of neck into anterior and posterior triangles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

sternocleidomastoid action

A

-unilateral contraction and bilateral contraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

deep cervical fascia

A

-consists of connective tissue that supports muscles, vessels, nerves, and viscera of the neck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

name the layers of deep cervical fascia

Study These Flashcards
A
  • investing layer
  • pretracheal
  • prevertebral
  • carotid sheath
  • retrophayngeal space
22
Q

investing layer

Study These Flashcards
A
  • most superficially located
  • roof over anterior and posterior triangles
  • encircles neck like a collar
23
Q

pretracheal layer

Study These Flashcards
A
  • located in anterior part of the neck

- muscular and visceral part

24
Q

muscular part of pretracheal layer

Study These Flashcards
A

-encloses infrahyoid muscles

25
visceral part of preracheal layer
-encloses thyroid gland, trachea, esophagus, larynx, and pharynx
26
prevertebral later
- located in posterior part of the neck | - surrounds cervical vertebrae and anterior and posterior vertebral muscles
27
carotid sheath
- fascial tube extending from base of skull to the root of the neck - contains common and internal carotid arteries, internal jugular vein, and vagus nerve
28
retropharyngeal space
- interval between buccopharyngeal fascia and prevertebral fascia - filled with loose connective tissue - closed laterally by carotid sheath - allows mobility of pharynx and esophagus - extends from base of skull to mediastinum
29
what is so special about the retropharyngeal space?
-it represents a pathway through which neck infections can spread to the mediastinum
30
buccopharyngeal space
-pretracheal layer when it is posterior to the pharynx and esophagus
31
boundaries of the posterior triangle
Anteriorly: posterior border of sternocleidomastoid Posteriorly: anterior border of trapezius Inferiorly: middle 1/3 of clavicle
32
what covers the posterior triangle?
-skin, superficial fascia, platysma, and investing layer of deep cervical fascia
33
What divides the posterior triangle?
-inferior belly of omohyoid divides posterior triangle into occipital triangle and supraclavicular triangle
34
scalenus anterior origin and insertion
origin: transverse process of C3 to C6 vertebrae insertion: superior surface of 1st rib and scalene tubercle
35
What is anterior to scalenus anterior?
- subclavian vein - phrenic nerve - superficial(transverse) cervical artery - suprascalpular artery - terminal part of thoracic duct
36
what is posterior to scalenus anterior?
- brachial plexus | - subclavian artery
37
scalenus medius
-largest and longest of scalene muscles Origin: transverse process of C2 to C7 vertebrae Insertion: superior surface of first rib, between costal tubercle and groove for subclavian artery
38
Scalenus posterior
- smallest of scalene muscles - Origin: transverse process of C4 to C6 vertebrae - Insertion: outer surface of 2nd rib
39
nerve supply of scalene muscles
-direct musclar branches from ventral rami of cervical spinal nerves
40
Actions of scalene muscles
- lateral flexion of neck | - accessory muscles for inspiration (elevate first and second ribs in forced inspiration)
41
omohyoid bellies
-inferior and superior bellies connected by an intermediate tendon
42
inferior belly of omohyoid
- attaches to superior border of the scapula - passes anteriorly and superiorly across the lower part of the triangle - passes deep to sternocleidomastoid and ends in intermediate tendon
43
superior belly of the omohyoid
- begins at intermediate tendon - ascends vertically in anterior triangle of the neck - attaches to body of the hyoid
44
omohyoid
-angulated course of muscle is maintained by loop of deep cervical fascia that surrounds intermediate tendon and attaches inferiorly to clavicle and first rib
45
nerve supply to omohyoid
ansa cervicalis(ventral rami of C1 to C3)
46
Action of omohyoid
depress hyoid bone
47
arteries in the posterior triangle
subclavian artery(3rd part) - superficial(transverse) cervical artery - suprascapular artery - dorsal scapular artery - occipital artery
48
veins in the posterior triangle
- external jugular vein and its tributaries | - subclavian vein(occasionally)
49
nerves in the posterior triangle
- brachial plexus and branches arising from its roots and trunks - accessory nerve - branches of cervical plexus
50
other contents in the posterior triangle
- some cervical lymph nodes | - inferior belly of the omohyoid muscle

Anatomy Block 3 (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions