thyroid and root of the neck Flashcards Preview

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Flashcards in thyroid and root of the neck Deck (50):

what does CN I do? how do you test it?

olfaction. coffee or peppermint smell


could you use alcohol to test CN1?

nope. that would be pain => trigeminal


what does CN II do? how do you test it?

optic. test visual field and pupil dilation


what is the efferent portion of pupil dilation?

occulomotor CN III


what are CN III,IV, VI?

occulomotor, trochlear and abducens


How would you test V? what is the name of that nerve?

touch their face. preferably in a nice way. also check their chewing muscles V3 (have them bite and feel masseter) trigeminal


how would you test chordae tympani?

put a little drop of sugar water on the anterior 2/3 of their tongue. this is important if you do surgery for middle ear (cochlear implant)


how would you test VII? what is the name of that nerve.

make faces at them and have them copy


how would you test the reflex arc between V and VII

put cotton on the cornea. that eliccits response from trigeminal and the muscle movement of orbicularis oculi is VII


How would you test VIII in a not creepy way?

close eyes and make a noise on one side of the head. which ear did they use.


what does the weber test do?

tests which ear has better bone conduction. that ear will sense the sound louder when you put the tuning fork on the top of you head


is nostagmus normal?

yes. if you spin in a chair and stop, then your eyes will twitch. also bosma has it


what reflex arc tests CN IX and X? what happens?

gag reflex. elevate the palate.


patient says "ah" and uvula goes to the left. where is the lesion?

check this. its either CN IX or X. but it is on the side OPPOSITE of the direction of the uvula. here, lesion is on the right


how do you test CN XI and XII

ask if they can shrug their shoulders against resistance


tongue deviates to the left side. where is lesion?

you lost the left side of XII. "TOngue deviates TOwards"


what is afferent/efferent limb of the jaw jerk reflex?

V3/V3. both ways.


what is relationship between thyroid cartilage and thyroid gland?

cartilage is SUPERIOR to the gland (C5-T1)


what is relationship between hyoid bone and thyroid cartilage?

hyoid is SUPERIOR to the thyroid cartilage


which muscles form the lateral border of the isthmus of the thyroid? fascia?

sternohyoid and cricothyroid/ pretrachial fascia


what fascia layer is on the posterior portion of the thyroid?

buccopharyngeal attaches on the posterior portion and encloses the esophagus, trachea, recurrent laryngeal n., middle thyroid vein.


which fascia encloses the vagus nerve?

this is a trick question. the recurrent laryngeal nerve is a branch of vagus. its in the visceral layer of pretrachial fascia. the main trunk of the vagus is in the carotid sheath


what fascia is directly ANTERIOR to the vertebral body

prevertebral fascia


what are the two main arteries that go to the thyroid?

inferior thyroid that comes off the thyrocervical trunk and goes POSTERIOR to the carotid sheath; also superior thyroid off the EXTERNAL carotid


what are the three veins from the thyroid?

inferior drains drains to brachiocephalic v the middle and superior drain into internal jugular


what does the R recurrent laryngeal recurrent go around?

Right is the right subclavian and comes in more LATERALLY; left goes around the arch of the aorta


relationship between inferior thyroid artery and recurrent laryngial nerve

posterior to the lower branch of the artery and anterior to the upper branch of the artery


what artery can branch directly off the arch of the aorta or the brachiocephalic?

thyroid ima artery in 10-12% of people; if you don't realize its there, you can tear a hole in this vessel. thats bad.


relationship between thyrocervical trunk and the phrenic nerve

the Artery is Anterior to the phrenic


review: where does the thoracic duct drain?

the angle between the L internal jugular and the L subclavian (venous angle)


what would you use a sestamibi scan for?

nuclear scan to light up the parathyroid. used for an adenoma


you might have to remove part of the hyoid bone in the removal of ____

cyst of thyroid or accessory thyroid gland


vagus nerve branches
what components do they have?

some motor to pharynx (gag reflex); superior laryngeal nerve this splits into internal laryngeal n (GVA) and external laryngeal nerve (SVE to cricothyroid and inferior constrictors); recurrent laryngeal is motor to vocal chords and some sensory below them (SVE and GVA)


what are the four branches of superior thyroid

infrahyoid, sup. laryngeal, cricothyroid, sup. thyroid


three branches of lingual a

deep lingual dorsal lingual, sublingual aa


occipital a comes off of the ???



what does cricothyroid m do

tilts forward to tighten the vocal fords


T/F the sympathetic chain is part of the carotid sheath.

false. its posterior to the sheath


phrenic neve is between what major vessels?

subclavian a/v


thyrocervical trunk is near???

medial edge of the anterior scalene m.


what branch of thyrocervical trunk is variable?

cervcodorsal trunk for ascending cervical a and transverse cervical a


what are the three large sympathetic ganglion?

superior(C1-C4/5), middle(C5-6), inferior cervical (C7-8/TI) ganglion


ansa cervicalis? ansa subclavia

loop of somatic nerves; loop of sympathetic nerves that is intuitively named because it loops around the subclavian artery


prevertebral fascia continues inferiorly as

axillary sheath


T/F cardiothoracic splancnic nerves are postganglionic

true! the splancnics in the ABDOMEN are preganglionic


which trunk sits posterior to the anterior scalene

costocervical trunk


where does dorsal scapular artery usually come off

dorsal scapular usually comes directly off the subclavian a.(dives between branches of brachial plexus)


remember army goes over the bridge

suprascapular goes over the ligament of the scapula, the nerve goes under


review: what type of nerves are in the carotid plexus?

sympathetics follow arteries!!


relationship between thoracic duct and the phrenic nerve

thoracic duct is anterior to the phrenic n.