Anat Study Guide 1

What is the adams apple

Laryngeal Prominence on thyroid cartilage

Landmark for emergency airway opening

cricothyroid ligament

SCM origin to insertion

origin: manubrium of sternum / Clavicle

insertion: mastoid process

What runs over SCM

-External jugular vein

-Great Auricular n (runs parallel to EJV)

-transverse cervical nerve

What runs below SCM

Accessory nerve CN XI

what does CN XI innervate?

SCM and Traps

All of the strap muscles are innervated by except for :

ansa cervicalis

except for thyrohyoid muscle

what is thyrohyoid muscle innervated by

Thyrohyoid muscle’s innervation comes from C1 of the cervical plexus.

The axon hitchhikes with the hypoglossal nerve (CN XII) for a short distance → ne

rve to the thyrohyoid muscle which innervates it

What does carotid sinus do? What receptors does it have? What is it innervated by?

it senses BP

the receptors that it has that do this are baroreceptors

innervated by CN IX

What does carotid body do? What receptors does it have? What is it innervated by?

Senses changes in oxygen levels

chemokine receptors

innervated by CN IX

pyramidal lobe

Elongated triangle projecting superiorly from the isthmus • Remnant of the thyroglossal duct

blood supply of thyroid

: superior thyroid artery

, inferior thyroid artery (branch of thyrocervical trunk)

Recurrent laryngeal nerve (branch of the ___ nerve) is parallel to the___

vagus

inferior thyroid artery

External branch of the superior laryngeal nerve innervates and always runs with __ and functions to ..

cricothyroid muscles

superior thyroid artery (branch of ECA)

increase tension for high pitched sounds on vocal cords

What nerve are the superior laryngeal nerve and the recurrent laryngeal nerve branches of?

vagus cn X