Anatomy - Thyroid Flashcards
what is the medical name for the adam’s apple?
laryngeal prominence
what divides the neck into anterior and posterior triangles?
sternocleidomastoid
where does the external jugular vein drain?
the subclavian vein
where does the anterior jugular vein drain?
external jugular vein
what are the two heads of the SCM?
sternal head
clavicular head
where does the sternal head of the SCM attach?
the manubrium of the sternum
where does the clavicular head of the SCM attach?
the medial end of the clavicle
where does the trapezius attach inferiorly?
spine of the scapula
lateral end of the clavicle
what nerve supplies the SCM and the trapezius?
CN XI
spinal accessory
what is the most superficial muscle in the neck?
platysma
what nerve innervates the platysma?
CN VII
facial nerve
what are the four fascial compartments of the neck?
investing
prevertebral
carotid sheaths
pretracheal fascia
what muscles are enclosed i the investing fascia?
trapezius
sternocleidomastoid
what is enclosed in the prevertebral fascia?
postural neck muscles
cervical vertebrae
what four things are found in each carotid sheath?
deep cervical nodes
vagus nerve
common carotid artery
internal jugular vein
what fascial compartment is the thyroid gland found in?
the pretracheal fascia
what is another name for the strap muscles?
the infrahyoid muscles
what are the four strap muscles?
thyrohyoid
sternohyoid
sternothyroid
omohyoid
what are the two parts of the omohyoid muscle?
superior belly
inferior belly
where does the thyroid gland begin development?
as a midline epithelial proliferation at the junction between the anterior and posterior sections of the tongue
what is the origin of the thyroid called in adults?
foramen caecum
what are the parts of the thyroid gland?
two lateral lobes - right and left
connected by the isthmus
what structures are the lobes of the thyroid connected to?
lateral aspects of thyroid + cricoid cartilages
trachea
where does the isthmus lie?
anterior to the 2nd and 3rd cartilages of the trachea
what happens to a lump in the thyroid during swallowing?
will be seen moving superiorly and then inferiorly with the larynx
what is an enlarged thyroid called?
a goitre
how many parathyroid glands are there?
four
where are the parathyroid glands located?
the posterior surface of the lateral lobes of the thyroid glands
what is a possible variation of the thyroid gland?
a pyramidal lobe
