Flashcards in Anatomy Deck (38):
what are the 3 parts of the brain stem (top to bottom)?
what joins the hypothalmus to the pituitary?
where is the pituitary gland?
in pituitary fossa in sphenoid bone
what does the pituitary fossa lie in?
what does the pituitary gland lie immediately inferior to?
what forms the optic chiasm?
the right and left optic nerves
what is bitemporal hemianopia?
there is disrupted transmission of action potentials from nasal retina bilaterally
means patient loses ability to see structure in temporal side of visual field bilaterally
what are the 2 surgical approaches to reaching the pituitary?
transcranial ( under frontal lobe)
transspherical (via nasal cavity and sphenoid sinus)
what makes the roof of the nasal cavity?
cribiform plate of ethmoid bone
what are the paranasal sinuses?
air filled spaces within the bone surrounding nasal cavities
name the paranasal sinuses
ethmoidal air spaces
what is the tentorium cerebelli/
tough sheet of dura matter that "tents" over cerebellum
what are the dural venous sinuses?
venous channels in dura matter that drain most of the blood from the cranial cavity into the internal jugular veins at the jugular foraminae
what happens if optic chiasm is injured?
what happens if oculomotor nerve is injured?
problems with eye movements
what happens if trochlear nerve is injured?
problems with specific aye movements
what happens if trigeminal nerve is injured?
sensory symptoms of face
what happens id abducent nerve is injured?
problems with specific eye movements
what happens id cavernous sinus is injured?
what happens if internal carotid is injured?
what happens if dura matter is injured?
cerebrospinal fluid leak
what does the thyroid gland consist of?
2 lobes and isthmus
where do the lobes of the thyroid gland attach to?
lateral aspects of thyroid and cricoid cartilage
how many parathyroid glands are there?
4- R+L superior and inferior
what vertebral level do you find the thyroid at?
what muscles are located immediately deep to the skin within the superficial fascia of the neck?
what groups of muscles do the platysma muscles belong to?
muscles of facial expression
what nerve innervates the platysma muscles
facial nerve- (CN 7)
name the 4 fascial compartments of the neck
2 carotid sheaths
what arteries supply the thyroid gland?
inferior and superior thyroid arteries
superior from external carotid
describe the venous drainage from the thyroid gland?
right and left superior, middle and inferior thyroid veins
what lymph nodes are around the thyroid gland? (4)
superior deep lymph nodes
inferior deep lymph nodes
where does the left recurrent laryngeal nerve recur?
under arch of aorta
where does the right recurrent laryngeal nerve recur?
under subclavian vein
where/how is a thyroidectomy incision made?
"collar " incision
just superior to clavicles and jugular notche
what does a unilateral recurrent laryngeal nerve injury cause?
weakness of voice