Anterior Triangle of the Neck Flashcards

1
Q

What creates the anterior boundary of anterior triangle?

A

Median line of the neck

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2
Q

The posterior boundary of the anterior triangle is formed by what?

A

Anterior border of SCM

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3
Q

What forms the superior boundary of the anterior triangle of the neck?

A

Inferior border of the mandible

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4
Q

The jugular notch in the manubrium forms what part of the anterior triangle

A

Apex

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5
Q

What constitutes the floor of the anterior triangle?

A

Pharynx, larynx, thyroid gland

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6
Q

The subcutaneous tissue containing the platysma forms what part of the anterior triangle?

A

Roof

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7
Q

What subdivides the anterior triangle into four smaller triangles?

A

Digastric

Omohyoid

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8
Q

What are the four small triangles?

A

Submental
Submandibular
Carotid
Muscular

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9
Q

Among these:

Submental
Submandibular
Carotid
Muscular

Which is unpaired?

A

Submental

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10
Q

What small triangle is inferior to the chin?

A

Submental

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11
Q

It is bounded inferiorly by the body of the hyoid and laterally by the right and left anterior bellies of the digastric muscles

A

Submental triangle

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12
Q

What forms the floor of the submental triangle?

A

2 mylohyoid muscles

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13
Q

What do you call the structure where the two mylohyoid muscles meet?

A

(median) fibrous raphe

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14
Q

What forms the apex of the submental triangle?

A

Mandibular symphysis

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15
Q

It is the site of union of the halves of the mandible during infancy

A

Mandibular symphysis

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16
Q

This forms the base of the submental triangle

A

Hyoid

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17
Q

Does the submental triangle house lymph nodes?

A

Yes, submental lymph nodes

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18
Q

Small veins unite with submental lymph nodes to form the -

A

Anterior jugular vein

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19
Q

It is a glandular area between the inferior border of the mandible and the anterior and posterior bellies of the digastric muscle

A

Submandibular triangle or digastric triangle

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20
Q

What forms the floor of the submandibular triangle?

A

Mylohyoid
Hypoglossus muscle
Superior pharyngeal constrictor

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21
Q

What gland can be seen in the submandibular triangle?

A

Submandibular gland

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22
Q

Where are the submandibular lymph nodes located relative to the submandibular gland and mandible?

A

Lie on each side of the gland, along inferior of the mandible

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23
Q

What nerve provides motor innervation to intrinsic and extrinsic muscles of the tongue?

A

Hypoglossal nerve (CN XII)

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24
Q

What nerve passes into the submandibular triangle together with nerve to mylohyoid?

A

Hypoglossal nerve

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25
Nerve to mylohyoid is a branch to what CN?
CN V3
26
What nerve supplies the anterior belly of the digastric?
Nerve to mylohyoid
27
What artery passes into the submandibular triangle?
Submental artery
28
Submental artery is a branch of what major artery to the face?
Facial artery
29
This triangle is a vascular area
Carotid triangle
30
The carotid triangle is bounded by what muscles?
Superior belly of omohyoid Posterior belly of digastric Anterior border of the SCM
31
What part of the brachiocephalic trunk ascends to the carotid triangle?
Common carotid artery
32
Th pulse of the common carotid artery can be palpated where?
Transverse processes of the cervical vertebrae
33
The common carotid artery divides into internal and external carotid arteries at the level of?
Superior border of the thyroid cartilage
34
Structures located within the carotid triangle
Carotid sinus | Carotid body
35
It is a dilation of the proximal part of the internal carotid artery
Carotid sinus
36
The carotid sinus is innervated principally by?
Glossopharyngeal nerve (CN IX) through carotid sinus nerve Vagus nerve (CN X)
37
A baroreceptor
Carotid sinus
38
A small reddish brown ovoid mass of tissue
Carotid body
39
Lies in a septum on the medial (deep) side of the bifurcation of the common carotid artery
Carotid body
40
Supplied mainly by carotid sinus nerve
Carotid body
41
Carotid body nerves
CN X and IX
42
A chemoreceptor that monitors level of oxygen in the blood
Carotid body
43
Stimulated by low levels of O2 | Initiates a reflex > increases rate and depth of respiration, cardiac rate, and BP
Carotid body
44
Surrounds neurovascular structures in the carotid triangle
Carotid sheath
45
Position of carotid arteries within carotid sheath
Medial
46
Position of IJV in carotid sheath
Lateral
47
Position of vagus nerve in carotid sheath
Posterior
48
Replaces the common carotid artery superiorly
Internal carotid artery
49
Lies on our embedded in the anterolateral aspect of the carotid sheath
Ansa cervicalis
50
These lie along the carotid sheath and IJV
Deep lymph nodes
51
Boundaries of the muscular triangle
Superior belly of omohyoid Anterior border of SCM median plane of neck
52
This triangle contains the infrahyoid muscles and viscera (thyroid and parathyroid glands)
Muscular triangle
53
What 2 glands are found in submandibular or digastric triangle?
Parotid and submandibular
54
Venous drainage in digastric triangle?
Anterior facial and internal jugular veins
55
Inferior boundary of submental triangle
Hyoid bone
56
Another name of muscular triangle
Triangle of necessity | Lower carotid triangle
57
Floor of muscular triangle
Sternohyoid muscle
58
Organs in muscular triangle
Thyroid gland Lower part of larynx Trachea
59
Arteries in muscular triangle
Common carotid | Inferior thyroid
60
Most important part of the anterior triangle
Carotid triangle or superior carotid triangle
61
Floor of carotid triangle
Thyrohyoid Hypoglossus Middle and inferior pharyngeal constrictors
62
Dilation of the proximal part of the internal carotid artery
Carotid sinus
63
Condensation of deep cervical fascia
Carotid sheath
64
The carotid sheath is thinner around arteries than veins. True or False
False thicker
65
Different branches of common carotid artery
Superior thyroid artery - superior laryngeal Lingual Facial
66
6 terminal branches of external carotid artery
``` Ascending pharyngeal artery Occipital artery Posterior auricular artery Superior thyroid artery Lingual Facial ```
67
Only medial branch of external carotid artery
Ascending pharyngeal
68
Superior to origin of the facial artery
Occipital artery
69
Most inferior of the three anterior branches
Superior thyroid artery
70
Anterior branches of external carotid artery
Superior thyroid Lingual Facial
71
Commencement of IJV
jugular foramen | Direct continuation of the sigmoid sinus
72
Tributaries of IJV
``` Inferior petrosal sinus Facial and lingual Pharyngeal Superior and middle thyroid Occipital ```
73
Broad strap like muscle with 2 heads
SCM Sternal head Clavicular head
74
Small triangular depression between 2 heads of SCM
Idk
75
Muscles in anterior triangle
Suprahyoid vs Infrahyoid Stylohyoid Digastric Mylohyoid Geniohyoid Omohyoid Sternohyoid Thyrohyoid Sternothyroid
76
Suprahyoid muscles are usually found in which triangles
Submental and submandibular
77
Nerve supply of stylohyoid
Facial nerve
78
Has 2 bellies - anterior and posterior
Digastric muscles
79
Opens mouth by lowering mandible and raising hyoid bone
Digastric muscle
80
Nerve supply of digastric muscle
Mylohyoid (manibular) Facial - posterior belly
81
Nerve supply of mylohyoid
Trigeminal nerve
82
Nerve supply of geniohyoid
Hypoglossal
83
STRAP MUSCLES
Infrahyoid
84
Nerve supply of sternohyoid
Anterior ramus of Ansa cervicalis
85
O - hyoid I - isthmus or pyramidal lobe of thyroid gland Inconstant muscle
Levator glandulae thyroideae ms