Anatomy - Cranial Nerves

Question 1

what are the three parts of the course of a cranial nerve?

Answer 1

CNS
intracranial
extra cranial

Question 2

what is the intracranial part of the course of a cranial nerve?

Answer 2

between the connection with the CNS and its base of skull foramina

Question 3

what nerve exits the skull via the cribriform plate of the ethmoid bone?

Answer 3

CN I

Question 4

what nerve exits the skull via the optic canal?

Answer 4

CN II

Question 5

what nerve exits the skull via the superior orbital fissure?

Answer 5

CN III
CN IV
CN V1
CN VI

Question 6

what nerve exits the skull via the foramen rotundum?

Answer 6

CN V2

Question 7

what nerve exits the skull via the foramen ovale?

Answer 7

CN V3

Question 8

what nerve exits the skull via the internal acoustic meatus?

Answer 8

CN VII

CN VIII

Question 9

what nerve exits the skull via the jugular foramen?

Answer 9

CN IX
CN X
CN XI

Question 10

what nerve exits the skull via the hypoglossal canal?

Answer 10

CN XII

Question 11

what are the three divisions of the trigeminal nerve?

Answer 11

ophthalmic
maxillary
mandibular

Question 12

where does the trigeminal nerve connect to the CNS?

Answer 12

pons

Question 13

describe the intracranial part of the course of the trigeminal nerve?

Answer 13

passes inferior to the edge of the tentorium cerebella between the posterior and middle cranial fossae

Question 14

where does CN V1 exit the skull?

Answer 14

superior orbital fissure

Question 15

where does CN V2 exit the skull?

Answer 15

foramen rotundum

Question 16

where does CN V3 exit the skull?

Answer 16

foramen ovale

Question 17

what nerve supplies the skin over the angle of the mandible?

Answer 17

great auricular nerve

Question 18

where does the facial nerve connect to the CS?

Answer 18

anterolaterally at the pontomedullary junction

Question 19

describe the intracranial part of the facial nerve course

Answer 19

goes directly into the internal acoustic meatus in the posterior cranial fossa

Question 20

what two base of skull foramina does the facial nerve exit the skull via?

Answer 20

internal acoustic meatus

stylomastoid foramen

Question 21

where does the glossopharyngeal nerve connect to the CNS?

Answer 21

the lateral aspect of the superior medulla oblongata

Question 22

where does the glossopharyngeal nerve exit the skull?

Answer 22

jugular foramen

Question 23

where does the vagus nerve connect to the CNS?

Answer 23

lateral aspect of the medulla oblongata

inferior to CN IX

Question 24

where does the vagus nerve exit the skull?

Answer 24

jugular foramen

Question 25

what is the most distal structure supplied with parasympathetics by the vagus nerve?

Answer 25

splenic flexure of the colon

Question 26

where do you touch to test the sensory supply of CN V1?

Answer 26

forehead upper eyelid tip of the dose

Question 27

where do you touch to test the sensory supply of CN V2?

Answer 27

mid cheek lower eyelid upper lip nostrils

Question 28

where do you touch to test the sensory supply of CN V3?

Answer 28

lower cheek lower lip chin

Question 29

how do you test the motor function of the trigeminal nerve?

Answer 29

ask the patient to clench their teeth and then open their jaw against resistance

Question 30

how do you test the motor function of the facial nerve?

Answer 30

frown close eyes tightly smile puff out cheeks

Question 31

what fibres are carried in the spinal accessory nerve?

Answer 31

motor

Question 32

how does the spinal accessory nerve connect with the CNS?

Answer 32

via cervical spinal nerve anterior rootlets | connects to the spinal cord

Question 33

describe the intracranial part fo the course of the spinal accessory nerve

Answer 33

ascends through the foramen magnum travels towards the jugular foramen

Question 34

what is the base of skull foramen for the spinal accessory nerve?

Answer 34

the junction between the temporal bone and occipital bone

Question 35

what muscles are supplied by the spinal accessory nerves?

Answer 35

SCM | trapezius

Question 36

what fibre type is carried in the hypoglossal nerves?

Answer 36

motor fibres

Question 37

how does the hypoglossal nerve connect to the CNS?

Answer 37

via rootlets that attach laterally to the pyramids of the medulla oblongata

Question 38

what is the base of skull foramen for the hypoglossal nerve?

Answer 38

hypoglossal canal