anatomy 101

Question 1

What are the twelve cranial nerves?

Answer 1

I: Olfactory 
II: Optic
III: Oculomotor
IV: Trochlear 
V: Trigeminal
VI: Abducens
VII: Facial
VIII: Vestibulococholear 
IX: Glossopharyngeal 
X: Vagus
XI: Accesory
XII: Hypoglossal

Question 2

What is the function of the olfactory?

Answer 2

Sense of smell (I)

Question 3

What is the function of the optic?

Answer 3

Vision (acuity), visual fields and pupillary light reflex (afferent limb) (II)

Question 4

What is the function of the oculomotor?

Answer 4

eyelid elevation, eye movement (elevation, abduction, depression in abduction) and pupillary light relax (efferent limb) (III)

Question 5

What is the function of the trochlear?

Answer 5

eye movements (intorsion, depression in adduction)

Question 6

What is the function of the trigeminal?

Answer 6

Motor to muscles of mastication and sensations rom face, sinuses, teeth etc (V)

Question 7

What is the function of the abducens?

Answer 7

Eye movement - abduction (VI)

Question 8

What is the function of the facial?

Answer 8

Motor to muscles of facial expression, sensory taste (anterior 2/3/ of tongue) and sensory to the external auditory meatus and nasopharynx (VII)

Question 9

What is the function of the Vestibulococholear?

Answer 9

Sense of hearing and sense of balance (VIII)

Question 10

What is the function of the Glossopharyngeal?

Answer 10

Motor to the stylopharyngess muscle sensory post (posterior 2/3 and general sensation forms eh tongue) and mucosa of the nasopharynx and middle ear (IX)

Question 11

What is the function of the vagus?

Answer 11

Motor to the vial muscles: sensory from the pharynx, larynx and lateral aspect of the face; parasympathetic innervation to the gastrointestinal tract, heart and lungs (X)

Question 12

What is the function of the accessory?

Answer 12

Motor to sternocleidomastoid and trapezius (XI)

Question 13

What is the function of the hypoglossal?

Answer 13

Motor to tongue muscle (XII)

Question 14

What from anterior to posterior are the foramina?

Answer 14

1. Criboform plate of ethnoid
2. Optic canal
3. Superior orbital fissure
4. Foramen rotundum
5. Foramen ovale
6. Foramen lacerum
7. Foramen spinosum
8. Cartoid canal
9. Intern acoustic meatus
10. Jugular foramen
11. Hypoglossal canal
12. Foramen magnum

Question 15

What goes through the criboform plate of ethnoid plate?

Answer 15

Olfactory nerve fibres

Question 16

What goes through optical canal?

Answer 16

Optic nerve (including central artery of retina), ophthalmic artery

Question 17

What goes through superior optical fissure?

Answer 17

Oculomotor (III), trochlear (IV), ophthalmic div of V (v1) abucent (VI) and sup thalamic vein

Question 18

What goes through foramen rotundum?

Answer 18

Maxillary division of V (v2)

Question 19

What goes through foramen ovale?

Answer 19

Maxillary division of V (v3)

Question 20

What goes through foramen lacerum?

Answer 20

internal carotid artery

Question 21

What goes through foramen spinosum?

Answer 21

Middle meningeal artery and vein

Question 22

What goes through the carotid canal?

Answer 22

Internal carotid artery

Question 23

What goes through the internal auditory meatus?

Answer 23

Facial (VII), vestibulocochlear (VIII), labyrinthine artery

Question 24

What goes through the jugular foramen?

Answer 24

Gloss (IX), vagus (X), access (XI), sigmoid sinus -> int jugular vein

Question 25

What goes through the hypoglossal canal?

Answer 25

Hypoglossal (XII)

Question 26

What goes through the foramen magnum?

Answer 26

Vertebral arteries, medulla of brain, spinal roots of accessory nerve