Quiz I: CN I and II Flashcards Preview

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Flashcards in Quiz I: CN I and II Deck (92)
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1

First order neurons of CN I (primary sensory neurons) are called what?

Olfactory neurons (bipolar cells)

2

Where are Olfactory Neurons located?

Olfactory epithelium lining superior part of the nasal cavity.

3

What covers the olfactory epithelium?

A thin layer of mucus.

4

What cells support the olfactory neurons?

"Supporting Cells"

5

What do olfactory "hairs" function as?

Receptors

6

Central processes (axons) collected into 10 to 20 olfactory nerves convey information to what?

Olfactory bulbs

7

Are Olfactory neuron axons myelinated?

No, however they are covered by Schwann cells

8

What bony feature do olfactory nerves pass through, and what bone is this feature found on?

1.) Cribriform Plate
2.) Ethmoid bone

9

The olfactory nerves enter the olfactory bulb and synapse on dendrites of ____________ cells.

Mitral cells

10

_________ ___________ are formed at the synapses in the olfactory bulb.

Synaptic Glomeruli

11

What are the secondary sensory neurons of CN I called?

Mitral Cells

12

Where are mitral cell bodies located?

Olfactory Bulb

13

Where do mitral cells relay information?

Posterior via the olfactory tract

14

At the anterior perforated substance, the olfactory tract fibers split into medial and Lateral ______ ______.

Medial and Lateral Olfactory Striae

15

Medial stria fibers cross the midline via the ________ ___________ and travel to the opposite olfactory bulb.

Anterior Commissure

16

Lateral stria fibers carry information where? (3 places)

1.) Primary Olfactory Cortex
2.) Periamygdaloid Area
3.) Prepiriform Area (including the Uncus/ BM Area 34) on the medial aspect of the temporal lobe.

17

T/F Each nostril sends info to both hemispheres?

True

18

T/F Each hemisphere receives info from both nostrils?

True

19

T/F The Mitral cell synapses at the Thalamus.

False, nowhere in this pathway does synapse occur at the thalamus.

20

What is the loss of smell called?

Anosmia, this condition is rare

21

How can skull fractures lead to smell deficits?

Skull fractures can lead to damage of C.N. I, especially if the ethmoid is involved.

22

How can you determine CSF leakage with a patient?

Presents differently on paper (tissue paper), halo sign will form if CSF is present as the mucus separates from CSF.

23

What pathway travels from the nasal septum and is autonomic?

Terminal nerve

24

What pathway is poorly developed in humans but well developed in animals that track their prey?

Vomeronasal Nerve

25

What is the sensory organ of vision?

The Eye

26

How many layers is the eye composed of?

3

27

What is the outermost layer of the eye called?

Fibrous Tunic

28

What does the Fibrous Tunic consist of? (2 parts)

Sclera (white part) and Cornea (clear part)

29

What is the middle layer of the eye called?

Vascular Tunic

30

What does the Vascular Tunic consist of? (3 parts)

Ciliary Body, Iris (Colored part) and Choroid