Flashcards in Anatomy Deck (78)
What is the diencephalon made up of?
thalamus and hypothalamus
What are the 3 parts of the brainstem?
midbrain; pons; medulla oblongata
What connects the hypothalamus and the pituitary gland?
infundibulum or pituitary stalk
What is pituitary fossa lie within?
the sella turcica
Where is the pituitary fossa?
a midline structure of the sphenoid bone
Which part of the retina do things from the nasal side of the visual side enter?
What lies immediately superior to the pituitary gland?
What forms the optic chiasm?
right and left optic nerves (CNII)
How do the signals from the eyes reach the visual cortex?
travel to the optic chaism, then that splits into right and left optic tracts, synapses at the thalamaus, pass via the optic radition to the visual cortex in the occipital lobe
What is the difference between nasal retina and temporal retina transmission?
nasal retina APs cross over at the chiasma but temporal retina APs stay on the same side
What is bitemporal hemianopia?
when a patient loses the ability to see structures in the temporal side of hte visual field bilaterally
What bone are the superior and middle nasal concha made from?
What are the paranasal sinuses?
air-filled spaces within the bones surrounding the nasal cavities
What type of epithelia line the paranasal sinsues?
muscous secreting respiratory muscosa
Which bones have a sinus?
frontal bone; maxilla; ethmoid bone; sphenoid bone
What is the function of the paranasal sinsues?
make muscous and drain it into the nasal cavities through ostia (bony drainage hole); reduce the weigth of the skull; add resonance to the voice
what lines the entire cranial cavity internally?
What is the tenorium cerebelli?
a tough sheet of dura mater "tenting" over the cerebellum between the cerebellum and cerebrum within the posterior cranial fossa but with a central gap to permit the brainstem to pass through
What is the diaphragm sellae?
a tough sheet of dura mater forming a roof over the pituitary fossa
What are the dural venous sinuses?
venous channels within the dura mater that drain most of hte venous blood from the cranial cavity (and brain) into the internal jugular veins
Where do the dural venous sinuses drain into the internal jugular veins?
at the jugular foraminae in the floor of the posterior cranial fossa
What venous drainage surrounds the pituitary gand?
cavernous and intercavernous sinuses
What arteries pass through the cavernous sinuses?
internal carotid arteries
What are the 3 parts of the thyroid gland?
2 lateral lobes and an isthmus
Where does the isthmus lie?
anterior to the 2nd and 3rd cartilages of the trachea
Where are the parathyroid glands located?
posterior surfaces of the thyroid glands lateral lobes
What is the pyramidal lobe?
an extra lobe on the thyroid gland which most commonly originates fro mthe left lateral lobe
What does the pyramidal lobe most commonly attach to superiorly?
Where does the thyroid gland begin its development
as a midline epithelial proliferation at the junction between the anterior and posterior parts of the tongue