Lecture 7 Flashcards
What is CN I?
Olfactory Nerve
What nerve number is the olfactory nerve?
CN I
What kind of nerve (sensory/motor) is CN I?
The Olfactory Nerve is pure sensory
What is the function of the Olfactory Nerve CN I?
Olfaction
Where does CN I carry inputs?
Olfactory tracts carry axons directly to the primary olfactory cortex, bypassing the thalamus
Why does the olfactory nerve bypass the thalmus?
An evolutionary adaptation
After reaching the primary olfactory cortex, where do CN I nerves go?
Amygdala (emotional response to smell)
Hippocampus (memory of smell)
Hypothalamus (visceral response to smell)
What is the second order neuron in the Olfactory (CN I) pathway?
The Olfactory tract
Where is the primary olfactory cortex found?
In the Uncus or the Parahippocampal Gyrus
What is found in the Uncus or the Parahippocampal Gyrus?
The primary olfactory cortex
Which CN nerves sense taste?
VII - Facial
IX - Glossopharyngeal
What is CN VII?
The facial nerve
What number is the facial nerve?
CN VII
What number is the Glossopharyngeal nerve?
CN IX
What is CN VII?
Facial nerve
What nerve is CN IX?
Glossopharyngeal
What nerve controls movement of the tongue?
Hypoglossal Nerve (XII)
What does Hypoglossal Nerve (XII) do?
Controls the movement of the tongue
Where does the Hypoglossal Nerve (XII) origniate?
The medulla
Where does the Hypoglossal (XII) nerve exit the skull?
Hypoglossal canal
What exits the Hypoglossal (XII) Canal?
The Hypoglossal nerve
What kind of nerve (sensory/motor) Hypoglossal nerve (XII)?
A pure motor
What muscle does the Hypoglossal Nerve (XII) inervate??
Genioglossus muscle
What nerve innervates the Genioglossus muscle?
Hypoglossal Nerve (XII)