brain/cranial nerves

Question 1

what is the name given to the outer most layer of the cerebral hemispheres, and what does it consist of

Answer 1

the cortex, consists of gyri and sulci

Question 2

how many lobes are there in each cerebral hemisphere and what are their names

Answer 2

frontal, temporal, parietal and occipital

Question 3

how many pairs of cranial nerves are there, and name and give function of first 3

Answer 3

12 pairs in total;
CN I = olfactory nerve, function = sensory(special)
CN II = optic nerve, function = sensory(special)
CN III = oculomotor nerve, function = motor

Question 4

give the names and function of the 4-6th cranial nerves

Answer 4

CN IV = trochlear nerve, function = motor
CN V = trigeminal nerve, function = both(sensory+motor)
CN VI = abducent nerve, function = motor

Question 5

give the names and function of the 7-9th cranial nerves

Answer 5

CN VII = facial nerve, function = both(sensory+motor)
CN VIII = vestibulocochlear nerve, function = sensory(special)
CN IX = glossopharyngeal nerve, function = both

Question 6

give the names and function of the 10-12th cranial nerves

Answer 6

CN X = vagus nerve, function = both(sensory+motor)
CN XI = spinal accessory nerve, function = motor
CN XII = hypoglossol nerve, function = motor

Question 7

name the 3 different cranial fossae and which cranial nerves exit/enter in through each one

Answer 7

3 cranial fossae = anterior cranial fossa, middle cranial fossa, posterior cranial fossa
anterior = CN I
middle = CN II-CN VI
posterior = CN VII-CN XII

Question 8

give the name of the different foraminae/fissures of the brain associated with the CN I-VI

Answer 8

cribriform plate of the ethmoid bone(CN I), optic canal(CN II), superior orbital fissure(CN III,IV,V1,VI), foramen rotundum(CN V2), foramen ovale(CN V3)

Question 9

give the name of the different foraminae/fissures of the brain associated with the CN VII-XII, and the name of the one not associated with any cranial nerves

Answer 9

internal acoustic meatus(CN VII,VIII), jugular foramen(IX,X,XI), hypoglossal canal(X II)
mot associated = foramen magnum