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Sensory PST > Anterior triangle of the Neck > Flashcards

Anterior triangle of the Neck Flashcards

1
Q

External jugular is formed by?

A

Retromandibular vein and posterior auricular vein.

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2
Q

Where does the anterior jugular vein run? \

A

Inferiorly, near the midline to suprasternal region - penetrates investing layer of the deep cervical fascia. Passes deep to sternocleidomastoid to join external jugular in root of neck.

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3
Q

Anterior triangle is divided into 4 main triangles.

A

Muscular triangle

Carotid triangle

Submandibular triangle

Submental triangle

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4
Q

What are the borders of the muscular triangle?

A

Superolateral - superior belly of omohyoid muscle

Inferolateral - anterior border of sternocleidomastoid

Medial - median plane of neck.

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5
Q

List contents of muscular triangle/

A

Infrahyoid muscles - sternohyoid muscle, superior belly of omohyoid muscle, sternothyroid muscle and thyrohyoid muscle

thyroid gland

parathyroid glands

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6
Q

Sternohyoid? Innervation?

A

21 on image - sits in front.

Ansa cervicalis - C1-C3

depress hyoid bone

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7
Q

Superior belly of omohyoid muslce? Innervation? Sits lateral to?

A

C1

Sits lateral to sternohyoid muscle.

Action - depress the hyoid bone.

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8
Q

Sternothyroid muscle?

A

C1 - C3

and the sternothyroid depress the larynx.

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9
Q

Thyrohyoid muscle?

A

Eleveates larynx, depress hyoid bone.

Innervation: hypoglossal + C1

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10
Q

Boundaries of the carotid triangle?

A

Inferomedial - superior belly of omohyoid muscle.

Inferolateral - anterior border of sternocleidomastoid muscle.

Superior - posterior belly of diagastric muscle.

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11
Q

Contents of carotid triangle?

A

Carotid arteries: common, internal and external

Branches of external artery

hypoglossal nerve

branches of vagus.

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12
Q

Superior root of ansa cervicalis?

A

C2-C3

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13
Q

Inferior root ansa cervicalis?

A

C2, C3

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14
Q

What nerve passes through the thyrohyoid membrane?

A

Internal branch of superior laryngeal nerve

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15
Q

What does the internal branch of the superior laryngeal nerve supply?

A

Mucosa of the larynx with sensory fibres.

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16
Q

What does the external branch of superior laryngeal nerve do?

A

Supply cricothyroid muscle and its function is to tense the vocal cord by activating the cricothyroid muscle and increasing pitch.

17
Q

Contents of carotid sheath?

A

Common carotid artery

Internal carotid artery

Internal jugular vein

Vagus

18
Q

Where can the external carotid artery be found?

A

At superior horn of thyroid cartilage. passes on medial side, deep to posterior belly of diagastric.

19
Q

6 branches of external carotid artery?

A

Ascending pharyngeal artery

Superior thyroid artery

Lingual artery

Facial artery

Occipital artery

Posterior auricular artery

20
Q

Carotid sinus?

A

Dilation of origin of internal carotid artery

Carotid body - innervated by glossopharyngeal nerve

Monitors change in O2 and CO2

21
Q

Identify vagus

A
22
Q

Borders of the submandibular triangle.

A

Superior: inferior border of mandible

anteroinferior - anterior belly of diagastric muscle

Posteroinferior: posterior belly of diagastric muscle

Superficial (roof - investing layer of deep cervical fascia

Floor - mylohyoid and hypoglossus.

23
Q

Contents of submandibular triangle?

A

Submandibular gland, facial artery, facial vein, stylohyoid muscle, hypoglossal nerve, lymph nodes.

24
Q

Submandibular gland

A
25
Q

Anterior belly diagastric innervation?

A

V3 - mylohyoid branch

3 on image

26
Q

Posterior belly diagastric?

A

facial nerve

attaches to mastoid process of temporal bone.

27
Q

anterior and posterior belly digastric attach to?

A

Intermediate tendon.

elevate hyoid bone, depress mandible.

28
Q

Stylohyoid

A

10 on image styloid process to hyoid bone.

Innervated by facial nerve.

29
Q

Mylohyoid

A

18 on image.

Innervated by V3 - mandicular nerve.

30
Q

Boundaries of submental triangle

A

right and left: anterior bellies of right and left digastric muscles

Inferior - hyoid bone

Superficial - investing layer of deep cervical fascia

Deep (floor) - mylohyoid muscle.

Contains submental lymph nodes.

31
Q

Mylohyoid innervation and action?

A

Support the floor of oral cavity

Mylohyoid nerve of V3

Sensory PST (6 decks)

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