Cranial Nerve 1 Flashcards
What is another name for the Cranial N. 1?
Olfactory Nerve
What is the name for primary sensory neurons?
Olfactory (bipolar) neurons
Where are primary sensory neurons located?
Lining superior part of the nasal cavity
What are the cells called that support the primary sensory neurons?
Supporting cells
How many olfactory nerves convey info to olfactory bulbs?
10-20
True or False
Axons in the olfactory neurons are myelinated.
False
What are olfactory neurons covered by?
Schwann cells
Olfactory nerves pass thru what bone?
The ethmoid (cribiform plate)
True or False
The olfactory nerves enter the olfactory bulb and synapse on bipolar cells
False Mitral cells (silly Brenna)
What are formed at the synapses of mitral cells?
Synaptic glomeruli
What are the names of the secondary sensory neurons?
Mitral cells
Where are the mitral cells located?
Olfactory bulb
True or False
Mitral cells relay information Ant. Via olfactory tract.
False
Posterior
Where does the olfactory tract relay information?
Anterior perforated substance
Anterior perforated substance splits into it?
Medial and Lateral olfactory striae
Where do the Medial Stria fibers travel to?
Crosses the midline via the anterior commisure and travel to the opposite olfactory bulb
Lateral stria fibers carry information where?
The primary olfactory cortex 1.Periamygdaloid 2.Preperiform area 3.Uncus (Brdmn 34) Which is on the medial aspect of the temporal lobe
How many neurons are in the C.N.1 Pathway?
2 Neurons
True or False
C.N.1 bypasses the Thalamus
TRUUUUUUUUUUUUUUUE
What nerve in C.N.1 has an autonomic function? Some believe this nerve helps with the saying “I can smell fear”
Terminal nerve
What nerve is poorly developed in humans? It is very important for tracking prey.
Vomeronasal nerve
What is it called when you have losses your sense of smell?
Anosmia
True or False
Loss of smell is common
False
Rare
When you see a patient with a skull fracture and they have fluid dripping out of there nose. What is the thing you will see on a Kleenex if you drip the fluid on there?
Halo sign
What is the fluid leaking out if you have a Halo sign?
CSF
