Blood Vessels, Nerve, And Viscera Of The Neck Flashcards Preview

Anatomy BLOCK 3 > Blood Vessels, Nerve, And Viscera Of The Neck > Flashcards

Flashcards in Blood Vessels, Nerve, And Viscera Of The Neck Deck (184)
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1

Where does the right common carotid artery originate from?

Brachiocephalic trunk
-posterior to right sternoclavicular joint

2

Where does the left common carotid artery originate from?

Aortic arch in superior mediastinum

3

Where does common carotid ascend?

In neck within carotid sheath

4

Where does common carotid divide?

Upper border of thyroid cartilage

5

What does the common carotid divide into at the upper border of thyroid cartilage?

External and internal carotid arteries

6

What is within the carotid sheath?

Internal jugular vein
Common carotid
Vagus nerve

7

How are the contents of the carotid sheath organized?

Internal jugular vein lies lateral to common carotid artery, and vagus nerve lies between common carotid artery and internal jugular vein, posteriorly

8

What is the terminal part of common carotid/beginning of internal carotid artery?

Localized dilation called carotid sinus

9

What is the highly vascularized epithelial structure located at the carotid bifurcation?

Carotid body

10

What does the carotid body contain?

Special nerve endings, mainly derived from glossopharyngeal nerve, which respond to chemical changes in blood composition, chemoreceptors

11

What does the carotid sinus have?

Wall contains numerous nerve endings, mainly derived from glossopharyngeal nerve, which are sensitive to changes in blood pressure (baroreceptors/pressoreceptors)

12

What are the carotid body and sinus important for?

Reflex control of heart rate, blood pressure, and rspiratory rate and depth

13

Where does the external carotid begin?

Upper border of thyroid cartilage

14

Where does the external carotid ascend into?

Carotid triangle

15

Where does the external carotid artery leave the carotid triangle?

As it passes deep (medial) to posterior belly of digastric and stylohyoid

16

Where does the external carotid terminate?

Within substance of parotid gland, posterior to neck of mandible, dividing into superficial temporal and maxillary arteries

17

What does the external carotid divide into?

Superficial temporal and maxillary arteries

18

Anterior branches of the external carotid

-superior thyroid
-lingual
-facial

19

Posterior branches of the external carotid artery

-occipital
-posterior auricular

20

Medial branch of the external carotid artery

Ascending pharyngeal artery

21

Terminal branches of the external carotid artery

Superficial temporal and maxillary arteries

22

Where does the superior thyroid artery originate from?

Initial part of external carotid artery

23

Superior thyroid artery route

Descends almost vertically to reach upper pole of lobe of thyroid gland and contributes to its blood supply

24

What artery does the superior thyroid artery give off?

Superior laryngeal artery (pierces thyrohyoid membrane with internal laryngeal nerve)

25

Lingual artery originates from where?

External carotid artery opposite tip of greater horn of hyoid

26

Lingual artery route

Initial segment is crossed superficially (laterally) by hypoglossal nerve.
Passes deep to hypoglossus muscle

27

What branches does the lingual artery give off?

Branches that supply the tongue

28

Where does the facial artery originate?

Immediately above the lingual artery (sometimes by a common trunk with it)

29

Facial artery route

Ascends medial (deep) to posterior belly of digastric and stylohyoid muscles, arches over these two muscles an submandibular gland, curves around inferior border of mandible (anterior to masseter) to enter face

30

What branches do the facial nerve give off?

Before it enters the face, it gives off branches that contribute to supply pharynx, soft palate, palatine tonsil, submandibular gland, and neighboring muscles