Exam 3 by n402913

Cranial Nerve 1 (I)

Olfactory

What does the olfactory nerve do?

-sense of smell

-carries information from receptor neurons to the brain

Cranial Nerve 2 (II)

Optic

What does the optic nerve do?

-vision

-Carries impulses from the receptors to the brain

is the optic nerve a sensory or motor nerve?

sensory

Where is the optic nerve located?

back of the eye

where is the olfactory nerve located

-Cranial nerve 1 is the shortest sensory nerve.

-It starts in your brain and ends in the upper, inside part of your nose.

What is the third cranial nerve? (III)

Oculomotor

What does the oculomotor nerve do?

It allows movement of the eye muscles, constriction of the pupil, focusing the eyes and the position of the upper eyelid. Cranial nerve III works with other cranial nerves to control eye movements and support sensory functioning.

Where is the oculomotor nerve located?

midbrain

what is the fourth cranial nerve (IV)

-trochlear nerve

- part of the autonomic nervous system

what does the IV (trochlear) cranial nerve do

It enables movement in the eye's superior oblique muscle. This makes it possible to look down. The nerve also enables you to move your eyes toward your nose or away from it.

where is the trochlear nerve

midbrain

What is cranial nerve V?

trigeminal nerve

what does CN V do?

Motor: Muscles of mastication, mylohyoid, anterior belly of digastric, tensor tympani muscles

Sensory: Scalp, face, orbit, paranasal sinuses, anterior two-thirds of the tongue

Is the trigeminal nerve motor or sensory?

largely a sensory nerve, it also mingles in the realm of motor supply

Where is the trigeminal nerve located?

pons

what is the 6th cranial nerve VI

abducens nerve

What does the abducens nerve do?

-lateral eye movement

-is one of the nerves responsible for the extraocular motor functions of the eye, along with the oculomotor nerve (CN III) and the trochlear nerve (CN IV).

Where is the abducens nerve located?

pons

what is the seventh CN VII

The facial nerve

what does CN VII do?

*Facial Nerve*

-controls facial movement and expression

-carries nerves that are involved in taste to the anterior 2/3 of the tongue and producing tears (lacrimal gland).

Where is the facial nerve located?

between the pons and medulla

what is the 8th cranial nerve?

Vestibulocochlear

what does the 8th Cranial Nerve do?

The vestibular nerve handles balance and equilibrium, while the cochlear nerve is responsible for hearing.

-hearing

-vertigo can be caused if damaged ... along with :

-balance disorder

-nystagmus (this one came from google id focus on the first two more)

Where is the 8th cranial nerve located?

between the base of the pons and medulla oblongata

What is the 9th cranial nerve?

Glossopharyngeal

What does CN IX do?

Afferent and efferent

Taste posterior third of tongue

Swallow

BP (visceral sensory - carotid bodies etc)

(test together with the tenth)

Where is the ninth cranial nerve located

what is CN X

Vagus

what is the function of the vagus nerve

regulation of internal organ functions

-digestion

-heart rate

-respiratory rate

-as well as vasomotor activity

-certain reflex actions, such as coughing, sneezing, swallowing, and vomiting

Where is the vagus nerve located?

medulla oblongata

What is CN 11 called?

accessory nerve

what does CN XI Control?

trapezius and sternocleidomastoid muscles

-Rotation of head away from the side of the contracting sternocleidomastoid muscle.

-Tilting of the head toward the contracting sternocleidomastoid muscle.

-Flexion of the neck by both sternocleidomastoid muscles.

Where is CN XI located on the brain?

medulla

What is CN XII

Hypoglossal

Whats CN XII function?

Tongue movment for speech sound articulation (l, t, n) and swallowing.

Where is CN XII (Hypoglossal) located?

medulla

motor cranial nerves

oculomotor (III)

trochlear (IV)

abducens (VI)

accessory (XI)

hypoglossal (XII)

sensory cranial nerves

Olfactory (I)

Optic (II)

Vestibulocochlear (VIII)

mixed sensory and motor nerves

V (trigeminal)

VII (facial)

IX (Trochlear)

X (Vagus)

Mnemonics for sensory or motor or both

(I) Some : Olfactory (sensory)

(II)Say : Optic (sensory)

(III)Marry: Oculomtor (motor)

(IV)Money: Trochlear (motor)

(V)But: Trigeminal (both)

(VI) My: Abducens (motor)

(VII) Brother: Facial (both)

(VIII)Says: Vestibucochlear (sensory)

(IX)Big: Glossopharyngeal (both)

(X)Brains: Vagus (both)

(XI)Matter: Accessory (motor)

(XII)Most: Hypoglossal (motor)

loss/damage to what cranial nerve would cause hearing loss?

-What else may it cause .... hint (dizziness)

When the auditory nerve (Vestibucoclear CN XIII/ CN 8) is damaged

-primary symptoms are sensorineural deafness

- and/or vertigo.

What is afferent?

(sensory) conducts signals from sensory neurons to the spinal cord or brain. carries it toward

What is efferent?

(Motor) Conducts signal away from the brain and spinal cord. carries away.

CNS v PNS chart

parasympathetic nervous system

the division of the autonomic nervous system that calms the body, conserving its energy

*rest and digest*

sympathetic nervous system

the division of the autonomic nervous system that arouses the body, mobilizing its energy in stressful situations

*fight or flight*

Beta 1

The beta 1 receptor is vital for the normal physiological function of the sympathetic nervous system.

-increases heart rate

(in class he told us to remember you have 1 heart, and 2 lungs)