head

Question 1

inferior petrosal sinus, ?situated ?drains ?feeds into

Answer 1

situated junction of the petrous part of the temporal bone with the basilar part of the occipital bone

drains bloods from cavernous sinus with veins from internal auditory veins, medulla and pons

drains into internal jugular vein

Question 2

where does the labyrinthine artery arise?

Answer 2

It usually originates from the AICA (~85%), although it can also branch from the basilar artery (~15%), vertebral artery (~5%) or even superior cerebellar artery.

Question 3

blood supply to the medulla oblongata?

Answer 3

Blood supply
posterior inferior cerebellar artery (PICA) supplies the lateral aspect of the medulla 2,3
anterior spinal artery supplies the entire medial aspect 2,3
direct branches of the vertebral artery supplies an area between the other two main arteries 2,3

Question 4

branches of maxillary artery

Answer 4

A mnemonic for remembering the branches of the maxillary artery is:

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Mnemonic
D: deep auricular artery
A: anterior tympanic artery
M: middle meningeal artery
I: inferior alveolar artery
A: accessory meningeal artery
M: masseteric artery
P: pterygoid artery
D: deep temporal artery
B: buccinator artery
S: sphenopalatine artery
D: descending palatine artery
I: infraorbital artery
P: posterior superior alveolar artery
M: middle superior alveolar artery
P: pharyngeal artery
A: anterior superior alveolar artery
A: artery of the pterygoid canal

Question 5

external carotid artery branches

Answer 5

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S: superior thyroid artery
A: ascending pharyngeal artery
L: lingual artery
F: facial artery
O: occipital artery
P: posterior auricular artery
S: superficial temporal artery
M:maxillary artery

Question 6

function of lateral pterygoid muscle?

Answer 6

to pull the head of the condyle out of the mandibular fossa along the articular eminence to protrude the mandible