trigeminal ganglion- middle meningeal artery other structures seen in cranial fossa

Question 1

location of trigeminal ganglion

Answer 1

trigeminal impression at the anterior part of petrous temporal bone
related with temporal cave or meckles cave

Question 2

relations of trigeminal ganglion

Answer 2

medially: internal carotid 
posterior part of cavernous sinus
laterally: middle meningeal artery
superiorly: parahippocampus gyrus 
inferiorly: motor root
greater petrosal 
foramen lacerum 
apex of petrous temporal bone

Question 3

divisions of trigeminal

Answer 3

ophtlamic mandibular and maxillary

Question 4

blood supply of triemincal ganglion

Answer 4

internal carotid
middle meningeal
accessory meningeal
meningeal branch of ascending pharyngeal artery

Question 5

origin of middle meningeal arter

Answer 5

first branch given off from maxillary artery given off in the infratemporal fossa

Question 6

mm artery enters the middle cranial fossa through

Answer 6

foramen spinosum

Question 7

mm artery grooving what bone and gives off what branches

Answer 7

grooves the squamous temporal bone and gives off parietal and frontal branch

Question 8

branches of mm artery given off in cranial cavity

Answer 8

Go- ganglionic branch to trigeminal ganglion
Play- petrosal branch to greater petrosal nerve
Tennis- temporal branch to temporal fossa
And- anastomosing branch that anastomose with lacrimal artery
Squash- superior tympanic branch to tensor tympani

Question 9

cranial nerves

Answer 9

1. olfactory- 15-20 fibers that pierce the cribriform plate of ethmoid
2. optic- goess off from the optic canal with the ophthalmic artery
   4 and 5. oculomotor and trochlear- posterior end of the roof of cavernous sinus the run on the lateral side of cavernous sinus and enter the orbit through superior orbital fissure
3. trigeminal sensory and motor root pierce through the apex of temporal bone and enter the middle cranial fossa
4. abducent pierces the posterior wall of cevernous sinus runs at the lateral side of dosrum sellar beneath the petrousphenoidal ligament and enter the cranial fossa
   7 and 8. facial and vestibulocochlear internal acousting meatus with labyrinthine vessels
   9.10.11. glossopharyngeal vagus and accessory pierce the dura mater and goes off from foramen magnum
5. hypoglossal pierce the dura matter separately pass through hypoglossal canal

Question 10

accessory nerve spinal and cranial part exit

Answer 10

spinal part enters the posterior cranial fossa through foramen magnum and then leaves off from jugular foramen with the cranial part

Question 11

internal carotid artery and its parts

Answer 11

its the branch given off from the common carotid artery 
cervical part
petrous part
cavernous part
cerebral part

Question 12

cervical and petrous part

Answer 12

cervical: in the neck lies in the carotid sheath
petrous part: within the carotid canal in the petrous temporal bone gives of caroticotympanic baranch and artery of pterygoid canal

Question 13

cavernous part

Answer 13

in the cavernous sinus it gives off branches

1. cavernous branch to the trigeminal ganglion
2. inferior and supri hypophyseal branches to the hypophyseal cerebri

Question 14

cerebral part of interna carotid artery

Answer 14

base of the brain gives off

1. ophthalmic
2. middle cerebral
3. anterior cerebral
4. posterior communicationg
5. anterior choroidal

Question 15

greater petrosal nerve

Answer 15

carries taste and parasympathetic fibers arsises from the geniculate ganglion of facial nerve and enters the middle cranial fossa through tha hiatus for greater petrosal nerve at the anterior part of petrous bone
goes into foramen lacerum and joins with deep petrosal to form the nerve of the pterygoid canal

Question 16

nerve of pterygoid canal

Answer 16

passes through the canal and relay in pterygopalatine ganglion. postganglionic supplies the lacrimal gland, mucous membrane of nose, palate and pharynx

Question 17

deep petrosal nerve

Answer 17

sympathetic in nature arises from the sympathetic plexus around the internal carotid
postganglionic fibers are from superior cervical ganglion
joins with greater petrosal to form the nerve of pterygoid canal

Question 18

lesser petrosal nerve

Answer 18

parasympathetic in nature arise from tympanic plexus
preganglionic fibers are from the tympanic branch of glossopharyngeal nerve and goes through the hiatus for lesser petrosal nerve leaves the skull through foramen ovale and relay in otic ganglion
suppy the parotid gland through the auricotemporal nerve

Question 19

external petrosal nerve

Answer 19

sympathetic in nature arises from sympathetic plexus around the mm nerve and goes to geniculate ganglion of the facial nerve