Thyroid: Science and Diseases Flashcards Preview

Y2 Endocrine > Thyroid: Science and Diseases > Flashcards

Flashcards in Thyroid: Science and Diseases Deck (131)
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1

Where do the thyroid lobes attach?

thyroid and cricoid cartilages

2

Which cartilages does the thyroid attach? Which is superior and which is inferior?

Thyroid (superior), Cricoid (inferior)

3

Where does the isthmus of the thyroid gland lie?

2-3rd tracheal cartilages -- C5-T1 vertebrae

4

Where does the thyroid gland originally develop?

between the anterior and posterior parts of the tongue, where the foramen caecum is found in adults

5

How does the thyroid migrate to its adult location?

via the thyroglossal duct - around week 7

6

Working anteriorly to posteriorly, what is the first level of fascia found at the neck?

Superficial fascia

7

What does the superficial fascia of the neck contain?

platysmus

8

Working anteriorly to posteriorly, what is found after the superficial fascia in the neck?

anterior investing fascia

9

What does the anterior investing fascia contain?

the sternocleidomastoid muscles

10

Working anteriorly to posteriorly, what is found after the anterior investing fascia in the neck?

pretracheal fascia

11

What is found within the pretracheal fascia? (5)

strap muscles, trachea, oesophagus, recurrent laryngeal nerves, thyroid gland

12

What is found bilaterally to the pretracheal fascia in the neck?

carotid sheath

13

What is found within the carotid sheath? (4)

internal jugular vein, deep cervical lymph nodes, vagus nerves, carotid arteries

14

Which fascia is found beyond the pre-tracheal fascia?

pre-vertebral fascia

15

What is found within the pre-vertebral fascia?

c-vertebrae, postural neck muscles

16

What muscle is found within the posterior investing fascia?

the trapezius muscles (bilaterally)

17

Which arteries supply the thyroid gland? (2)

superior and inferior thyroid arteries

18

What are the origins of the superior and inferior thyroid arteries?

superior - external carotid; inferior - branch of subclavian

19

Which veins does the thyroid gland drain? (3)

the superior (2), middle (2) and inferior thyroid (1) veins

20

Where do the veins from the thyroid gland drain?

superior and middle --> internal jugular --> brachiocephalic; inferior --> brachiocephalic

21

Which lymph nodes does the thyroid gland drain into? (4)

the inferior pretracheal node; paratrachial nodes; superior deep cervical nodes and deep cervical nodes

22

Which aortic arch is the subclavian artery formed from?

4th

23

Which aortic arch is the arch of the aorta formed from?

4th

24

Name the 4 strap muscles

Omohyoid, sternohyoid, sternothyroid, thyrohyoid

25

What 3 things does the thyroid gland secrete?

T4 (thyroxine), T3 (triiodothyronine), calcitonin

26

What naturally causes an increase in the size of the thyroid gland?

menstruation and pregnancy

27

Innervation of the thyroid gland (2)

ANS including Vagus nerve (Parasympathetic) and the sympathetic trunk

28

Describe the structure of the thyroid gland

follicles surround by follicular cells; parafollicular C cells found dotted about

29

What is found within the follicle of the thyroid gland?

colloid - tyrosine containing thyroglobulin

30

How are T3/T4 secreted into the blood stream?

via pinocytosis