Cranial nerves

Question 1

Cranial nerve I

Answer 1

Olfactory nerve
Sensory
Function: sense of smell
This nerve tract bypasses the thalamus and goes straight to the brain for processing

Question 2

Cranial nerve II

Answer 2

Optic nerve
Sensory
Vision
Not a true peripheral nerve, rather an extension of the brain
The decussation of this nerve forms the optic chiasm

Question 3

Cranial nerve III

Answer 3

Oculomotor
Motor
Eye movement
Pupillary constriction

Question 4

Cranial nerve IV

Answer 4

Trochlear
Motor
Eye movement
(Superior oblique muscle

Only cranial nerve to emerge from the posterior surface of the brain stem

Question 5

Cranial nerve V

Answer 5

Trigeminal Nerve
3 branches
Mixed (both)
Sensory to face and eye, nasal cavity, teeth, oral cavity. Motor to muscles of mastication
Branches of this Nerve include ophthalmic, maxillary, and mandibular

Question 6

Cranial nerve VI

Answer 6

Abducens
Motor
Eye movement (lateral rectus muscle)

Question 7

Cranial nerves VII

Answer 7

Facial nerves
Mixed (both)
Taste, motor to muscles of facial expression and salivary glands
This nerve provides the anterior tongue with General sensation

Question 8

Cranial nerves VIII

Answer 8

Vestibulocochlear
Sensory
Hearing and equilibrium

Question 9

Cranial Nerve IX

Answer 9

Glossopharyngeal
Mixed (both)
Taste, sensory to middle ear cavity, pharynx, carotid body
Has a visceral motor function that gives parasympathetic innervation to the parotid gland.

Question 10

Cranial nerve X

Answer 10

Vagus
Mixed (both)
Sensory to skin near ear, pharynx, larynx. Muscles of pharynx, larynx
Provides parasympathetic innervation to viscera

Question 11

Cranial Nerve XI

Answer 11

Spinal accessory
Motor
Motor to trapezius and sternocleidomastoid

Question 12

Cranial Nerve XII

Answer 12

Hypoglossal
Motor
Motor to intrinsic muscles of the tongue
Injury to this nerve can affect the
Muscles of the tongue

Question 13

Cranial nerves mnemonic for functional categories

Answer 13

Some say money matters but my brother says big butts matter more

Question 14

Cranial nerves mnemonic for names

Answer 14

Oh,oh,oh to touch and feel very good virgins and hoes

Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Vestibular
Glossopharyngeal
Vagus
Spinal accessory
Hypoglossal

Question 15

Nucleus concerning neurons

Answer 15

Collection of cell bodies in CNS with specific function or target

Question 16

Tract concerning neurons

Answer 16

Collection of nerve fibers (axons) in the PNS

Question 17

Bipolar neuron

Answer 17

They have 2 processes separated by the cell body. Specialized sensory neuron for the transmission of special senses

Question 18

Multipolar neuron

Answer 18

Have more than 2 processes; there is a single axon & multiple dendrites. Motor neurons and interneurons

Question 19

The 3 layers of meninges from external to internal

Answer 19

Dura mater
Arachnoid mater
Pia mater

Question 20

What are ventricles and where are they located?

Answer 20

Communicating Cavities in the brain filled with CSF

Question 21

Where is the cerebrospinal fluid produced and by what tissue produces the cerebrospinal fluid?

Answer 21

Ventricles

Choroid plexus

Question 22

What are the 2 main functions of the CSF?

Answer 22

Cushioning and supporting the brain

Transporting nutrients, chemical messengers and waste products

Question 23

CSF flow

Answer 23

Lateral ventricles
          🔻
Interventricular foramen
           🔻
3rd ventricle
           🔻
Cerebral aqueduct
           🔻
4th ventricle
           🔻
Median aperture/lateral aperture
           🔻
Subarachnoid space