Anatomy of the Thyroid Gland Flashcards Preview

The Endocrine System > Anatomy of the Thyroid Gland > Flashcards

Flashcards in Anatomy of the Thyroid Gland Deck (52)
Loading flashcards...
1

The thyroid gland is closely related to which anatomical structures in the anterior neck?

  1. Larynx
  2. Trachea

2

Usually, the thyroid gland consists of which three parts?

  1. Right lateral lobe
  2. Left lateral lobe
  3. Isthmus

3

What is the isthmus of the thyroid gland?

The connection between the right and left lateral lobes

4

The lateral lobes of the thyroid gland attach to what?

Lateral aspects of thyroid and cricoid cartilages

5

The isthmus lies anterior to the ____ and ____ cartilages of the trachea

The isthmus lies anterior to the 2nd and 3rd cartilages of the trachea

6

Where are the four parathyroid glands located?

Posterior surfaces of the thyroid gland's lateral lobes

7

What is one of the most common anatomical variations of the thyroid gland?

Pyramidal lobe

8

Usually the pyramidal lobe originates from the _______ lateral lobe

Usually the pyramidal lobe originates from the left lateral lobe

9

How does the thyroid gland begin its development?

A midline epithelial proliferation at the junction between the anaterior and posterior aspects of the tongue

10

The thyroid gland will migrate inferiorly whist still being attached to the tongue via what?

Thyroglossal duct

11

In which week of development will the thyroid gland reach its final postition?

7th

12

What are the platysma?

Broad sheet-like superficial muscles that overlap the sternocleidomastoid and sit in the subcutaneous tissue in the neck

13

What is the nerve supply of the platysma muscles?

Facial nerve (CN VII)

14

How many fascial compartments are there in the neck?

4

15

What are the fascial compartments in the neck?

  1. Prevertebral deep fascia
  2. Investing deep fascia
  3. Carotid sheaths
  4. Pretracheal deep fascia

16

What is the location of the prevertebral deep fascia?

Deep to the investing fascia

Located most posteriorly in the neck

17

What is contained within the investing fascia?

  1. All other neck fascial compartments
  2. Trapezius
  3. Sternocleidomastoid

18

What is carried within the carotid sheaths in the neck?

  1. Vagus nerves
  2. Carotid arteries (common then internal)
  3. Internal jugular veins
  4. Deep cervical lymph nodes

19

Where is the pretracheal fascia located and what does it enclose?

Most anteriorly within the enclosure of the investing fascia

Encloses:

  1. Oesophagus
  2. Trachea
  3. Thyroid gland
  4. Strap muscles
  5. Recurrent laryngeal nerves

20

Which nerve supplies the sternocleidomastoid and trapezius?

Spinal accessory nerve (CN XI)

 

21

The external jugular vein runs within the __________ _______ and drains into the _____________ _____

The external jugular vein runs within the superficial fascia and drains into the subclavian vein

22

Where does the anterior jugular vein run and where does it drain?

Superficial fascia

External jugular vein

23

The sternocleidomastoid is enclosed within what?

Investing fascia

24

The sternocleidomastoid has two heads, what are they and where do they both insert?

  1. Sternal head - manubrium of the sternum
  2. Clavicular head - medial end of the clavicle

25

What is the origin of the sternocleidomastoid?

Mastoid process of the temporal bone

26

The carotid sheaths are located _____________ either side of the __________ ________

The carotid sheaths are located anterolaterally either side of the thyroid gland

27

Where do the carotid sheaths attach to the skull?

Base of skull

(around jugular foramen and entrance to carotid canal)

28

Where does the carotid sheath attach inferiorly?

Blends with mediastinal fascia

29

Where is the vagus nerve located in the neck?

Carotid sheath

(between the common carotid artery and the internal jugular vein)

30

What is the arterial supply of the thyroid gland?

  1. Superior thyroid arteries
  2. Inferior thyroid arteries