Cranial nerves

Question 1

Fill in the cranial nerve table

Answer 1

Question 2

Label the cranial nerve exit point

Answer 2

Question 3

Mnemonic to learn cranial nerve function

Answer 3

Some say marry money, but my brother says big brains matter more

Question 4

Mnemonic to learn cranial nerve names

Answer 4

Oh oh oh to touch and feel very good vagina, ah heaven

Question 5

Fill in the cranial nerve table

Answer 5

Question 6

Explain the pupillary light reflex pathway

Answer 6

1. Light enters eye through cornea & passes through lens to reach retina
2. Photoreceptor cells detect light & convert it to electrical signals which are transmitted to ganglion cells
3. Ganglion cells transmit information and transmit it via optic nerve
4. Optic nerve fibres from each eye converge at optic chiasm & travel to visual centres in brain where they synapse with neurons involved in pupillary light reflex
5. Parasympathetic preganglionic neurons send signal via oculomotor nerve to ciliary ganglion
6. Preganglionic fibres synapse with post ganglionic fibres which then reach the iris sphincter muscle
7. Iris sphincter muscle contracts which constricts the pupil

Question 7

Explain the visual pathway

Answer 7

1. retina
2. optic nerves
3. optic chiasm
4. optic tracts
5. Lateral Geniculate Nucleus
6. Visual cortex
7. visual association areas
8. Higher order brain regions