Olfactory Flashcards

1
Q

What foramina does the olfactory nerve pass through?

A

Cribriform plate of the ethmoid bone

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2
Q

What type of information does the olfactory nerve carry?

A

Special sensory

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3
Q

What is the function of the olfactory nerve?

A

Olfaction (sense of smell)

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4
Q

Describe the extracranial path of CNI?

A

Odour is detected by sensory cells in the nasal mucosa. This sensory information is then transmitted along the fine, unmyelinated axons of CNI which then enters the anterior cranial fossa

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5
Q

Describe the intracranial path of CNI?

A

Axonal fibres communicate with neurones in the olfactory bulb, and axons from these neurones then form the olfactory tract to project into the olfactory cortices where information is processed

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6
Q

What are some important facts to know about CNI?

A

It is the shortest CN / it is the only sensory CN which does not synapse at the thalamus before reaching the cortex

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7
Q

How would CNI be tested?

A

Ask the patient to try and recognise a particular smell while covering the contralateral nostril

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