Anatomy of the Thyroid Gland Flashcards Preview

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Flashcards in Anatomy of the Thyroid Gland Deck (61)
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1

At what vertebral level does the larynx become the trachea

C6

2

What 2 structures is the thyroid gland closely related to in the anterior neck

The larynx and the trachea

3

What does the thyroid gland usually consist of

2 lateral lobes (right and left) and an isthmus

4

What is the isthmus

A narrow connecting band

5

What do the lobes of the thyroid gland attach to

The lateral aspects of the thyroid and cricoid cartilages and to the trachea

6

What direction will the thyroid gland move when we swallow

Same as the larynx and the trachea
It will move superiorly then inferiorly

7

Where are the 4 parathyroid glands located

Not the posterior surfaces of the thyroid gland's lateral lobes

8

What cartilage is located superiorly to the cricoid cartilage

The arytenoid cartilage

9

Where does the pyramidal lobe most commonly originate from

The left lateral lobe of the thyroid gland

10

Where doe most pyramidal lobes superiorly attach to

the thyroid cartilage

11

Some pyramidal lobes may extend as far superiorly as where?

The hyoid bone

12

Where does the thyroid gland begin its development

As a midline epithelial proliferation at the junction between the anterior 2/3rd and the posterior 1/3 of the tongue

13

Where does the gland migrate to

Migrates inferiorly whilst remaining attached to the tongue to the thryoglossbal duct

14

When does the thyroid gland reach its final position

7th week of development

15

Where might the pyramidal bone be found

Anywhere along the migratory path of the thyroid gland
It is an ectopic thyroid gland tissue

16

What encapsulates the trachea, the oesophagus and the thyroid gland

A layer of deep neck fascia - pre tracheal fascia

17

What muscle can be found in the superficial fascia

The platysma muscle - muscle of facial expression

18

Where nerve supplies the platysma muscles

cranial nerve VII (facial nerve)

19

Where does the platysma muscle lie

It extends for the lower border of the mandible to the lower border of the neck

20

Name the 4 fascial compartments of the neck

Prevertebral (deep) fascia
Investing (deep) fascia
The 2 carotid sheaths
Pretracheal (deep) fascia

21

What deep fascia layer is the most superficial

Investing

22

What is contained within the investing fascia

All other neck fascial compartments
encloses 2 pairs of muscles: trapezius and the sternocleidomastoid

23

What fascia is deep to the investing fascia

Prevertebral fascia, the pre tracheal fascia and the 2 carotid sheaths

24

What is contained within the prevertebral fascia

Encloses the cervical vertebrae and the postural neck muscles

25

What is enclosed by the carotid sheaths

Internal jugular veins
carotid arteries
the vagus nerves
the deep cervical lymph nodes

26

What are the strap muscles responsible for

Depressing the laryngeal cartilage when speaking and swallowing

27

What is the space between the prevertebral and the pre tracheal fascia called and why is this important

Retropharyngeal space - if infection develops, it will spread rapidly through this space

28

where does the sternocleidomastoid attach

Sternal head - manubrium of the sternum
clavicular head - medial end of the clavicle
Both heads pass superiorly to attach to the mastoid process of the temporal bone

29

Describe the anterior jugular vein

It is superficial vein in the superficial fascia which drains into he external jugular vein

30

Describe the external jugular vein

A superficial vein in the superficial fascia which drains in to the subclavian vein