anterior triangle of the neck

Question 1

what divides the anterior and posterior triangle of the neck

Answer 1

sternomastoid muscle

Question 2

what is the anterior triangle of the neck developed from

Answer 2

1st pharyngeal arch

Question 3

name the superior, inferior, anterior and posterior boundaries of the anterior triangle

Answer 3

superior = lower border of the mandible
inferior = jugular notch
anterior = midline of the neck
posterior =ANTERIOR margin of SCM

Question 4

name the supra hyoid muscles

Answer 4

digastric, mylohyoid, geniohyoid, stylohyoid

Question 5

name the infrahyoid or strap muscle

Answer 5

omiohyoid, sternohyoid, sternothyroid, thyrohyoid

Question 6

what are notable vessel and nerves in the anterior triangle of the neck

Answer 6

common carotid arteries and it bifurcates into external and internal carotid
internal jugular
cranial nerves CN VII, IX, X , XI , XII

Question 7

what is the thyroid cartilage

Answer 7

superior to the thyroid glansd, can been seen as Adams apple, vocal cords and ligaments attach poster surface of this

Question 8

what is the supra hyoid nerve supply

Answer 8

digastric - anterior - nerve to myohyoid, posterior - facial nerve
stylohyoid - facial
mylohyoid - mylohyoid nerve
geniohyoid- hypoglossal nerve

Question 9

what is the nerve supply to the infrahyoid or strap muscle

Answer 9

sternohyoid, omiohyoid and sternothyroid = ansa cerivercalis
thyrohyoid = hypoglossal

Question 10

what is the isthmus of the thyroid

Answer 10

a very vascular part of the thyroid gland that sits on top of 2nd, 3rd, 4th rings of the trachea