Block 12 Formative Questions

Question 1

What ganglion is involved in mediating the pupillary light reflex

Answer 1

The ciliary ganglion innervates sphincter pupillae via post ganglionic fibres.

Parasympathetic nerves from the edinger westphal nucleus synapse (pre-ganglionic)

Question 2

Lesions of the optic tract, lateral geniculate body and visual cortex results in loss of vision in the opposite visual field

Question 3

Primary cause of subarachnoid haemorrhage

Answer 3

Berry aneurysm

Question 4

Posterior column cord sensations include what

Answer 4

Fine touch, two point discrimination, proprioception and vibration sense for entire body except head and neck

Question 5

Loss of vision of left visual filed with macular sparing. Where is the lesion

Answer 5

Any lesion to visual cortex results in visual loss in opposite field with macular sparing

Due to macula having bilateral representation and also bilateral blood supply (middle cerebral artery and posterior cerebral artery)