The Neck and the thyroid Gland

Question 1

What does the sternocleidomastoid muscle do?

Answer 1

The sternocleidomastoid muscle divides the neck into the anterior and posterior triangle of the neck

Question 2

Locate the hyoid bone

What is it suspended by?

Answer 2

Just below the tongue is the hyoid bone. It is suspended by the infrahyoid strap muscles.

Question 3

Locate the left and right lobe of the thyroid gland

Locate the isthmus

Locate the carotid artery that bifurcates into the internal and external

Answer 3

On image

Question 4

Describe the blood and arterial supply of the thyroid gland

Answer 4

• Blood supply is delivered by the superior thyroid artery – the first branch of the external carotid
• The inferior thyroid artery comes from the subclavian artery and ascends in the root of the neck.
• The recurrent laryngeal nerve runes superiorly in the groove between the trachea and oesophagus. Passes under the arch of aorta.
• Venous drainage of the thyroid is via the superior, middle and inferior thyroid veins

On image