Overview Flashcards by Katie Keller

CN-I is also called what?

Olfactory

How well did you know this?

Not at all

Perfectly

CN-II is also called what?

Optic

How well did you know this?

Not at all

Perfectly

Is CN-I sensory, motor, or both?

Sensory

How well did you know this?

Not at all

Perfectly

CN-I passes through what structure?

Pass through cribiform plate of ethmoid bone (Cristae gallae sits between them)

How well did you know this?

Not at all

Perfectly

What is unique about CN-I and CN-II that is different from the remaining cranial nerves?

They are direct extensions of the brain

How well did you know this?

Not at all

Perfectly

Is CN-II sensory, motor, or both?

Sensory

How well did you know this?

Not at all

Perfectly

What is the function of CN-I?

Sense of smell

Supply olfactory mucosa in superior nasal cavity

How well did you know this?

Not at all

Perfectly

What is the function of CN-II?

Special sense of vision

How well did you know this?

Not at all

Perfectly

CN-II passes through what structure?

Pass through optic canal

How well did you know this?

Not at all

Perfectly

What test(s) is used to assess CN-I?

Smell test

How well did you know this?

Not at all

Perfectly

What test(s) are used to assess CN-II?

Visual acuity

Visual fields

Fundi

Afferent limb of pupillary response

How well did you know this?

Not at all

Perfectly

CN-III is also called what?

Oculomotor

How well did you know this?

Not at all

Perfectly

Is CN-III sensory, motor, or both?

Motor

How well did you know this?

Not at all

Perfectly

CN-III passes through what structure?

Pass through superior orbital
fissure

How well did you know this?

Not at all

Perfectly

What test(s) are used to assess CN-III?

Eye movement

Accommodation

Pupil constriction

How well did you know this?

Not at all

Perfectly

What is the function of CN-III?

Muscle movement in the eye (No lateral movement!!)

How well did you know this?

Not at all

Perfectly

What does CN-III supply?

Inferior rectus

Medial rectus

Inferior oblique

Superior rectus

Levator papelbrae superioris

How well did you know this?

Not at all

Perfectly

CN-IV is also called what?

Trochlear

How well did you know this?

Not at all

Perfectly

Is CN-IV sensory, motor, or both?

Motor

How well did you know this?

Not at all

Perfectly

What is the function of CN-IV?

Motor movement to superior oblique (Depresses, abducts, and medially
rotates the eye)

How well did you know this?

Not at all

Perfectly

What test(s) are used to assess CN-IV?

Eye Movement

How well did you know this?

Not at all

Perfectly

What is the smallest cranial nerve?

CN IV - Trochlear

How well did you know this?

Not at all

Perfectly

What is the largest cranial nerve?

CN V - Trigeminal

How well did you know this?

Not at all

Perfectly

CN-V is also called what?

Trigeminal

How well did you know this?

Not at all

Perfectly

Is CN-V sensory, motor, or both?

Both

What test(s) are used to assess CN-V?

Corneal reflex (afferent) Facial sensation Test masseter and temporalis muscle by having patient bite down

What is the function of CN-V?

CN-IV comes from what structure?

Comes off the pons

What are the 3 sensory components of CN-V?

V1- ophthalmic V2 – maxillary V3 – mandibular

What is the motor function of CN-V?

Temporal and masseter muscle strength Lateral movement of jaw

Name the three branches of V1 (ophthalmic branch) of CN-V

Frontal Nasociliary Lacrimal

V1 provides sensory information of what area(s)?

Corneal reflex Forehead Nasal cavity Paranasal sinuses

V2 provides sensory information of what area(s)?

Nasal cavity Palate Upper teeth Maxillary sinus

V3 provides sensory information of what area(s)?

Oral cavity Cheek Tongue Lower lip Lower teeth Skin over mandible

V3 provides motor information of what area(s)?

Mastication muscles Suprahyoid muscles

CN-VI is also called what?

Abducens

What is the function of CN-VI?

Abduct the eye

What test(s) are used to assess CN-VI?

Eye Movement test

Is CN-VI sensory, motor, or both?

motor

What does CN-VI supply?

Supplies lateral rectus

Where does CN-VI enter and exit?

Enters via superior orbital fissure Exits brainstem between pons and medulla

CN-V (V3) exits where?

Exits via foramen ovale

CN-V (V2) exits where?

Exits via foramen rotundum

CN-V (V1) enters where?

Enters via superior orbital fissure

CN-VII is also called what?

Facial nerve

What is the function of CN-VII?

Motor to facial nerves and sensory

Is CN-VII sensory, motor, or both?

Both

What test(s) are used to assess CN-VII?

Raise eyebrows Close eyes tight Grimace Smile Corneal reflex (efferent)

CN-VII exits where?

Exits via internal auditory meatus and canal

What are the five branches of CN-VII?

Temporal Zygomatic Buccal Mandibular cervical

CN-VIII is also called what?

Auditory

What is the function of CN-VIII?

Hearing Equilibrium Motion (acceleration/deceleration)

Is CN-VIII sensory, motor, or both?

Sensory

What test(s) are used to assess CN-VIII?

Test by watch tick, finger rub Weber-Rinne test if hearing loss noted on history or gross testing

CN-VIII exits where?

Leaves via internal auditory meatus/canal

CN-IX is also called what?

Glossopharyngeal

Is CN-IX sensory, motor, or both?

Both

What is the function of CN-IX?

Sensory (Posterior 1/3 tongue (taste), Pharynx, Middle ear, Gag reflex) Motor (Stylopharyneus) Parasympathetic (Jugular foramen)

CN-X is also called what?

Vagus

Is CN-X sensory, motor, or both?

Both

What is the function of CN-X?

Sensory - Larynx, External auditory meatus/canal, Heart, Great vessels, Carotid body, Sinus Motor - Palate, Pharynx, Larynx Parasympathetic - Viscera of thorax, Viscera of abdomen

CN-X exits where?

Exits via jugular foramen

CN-XI is also called what?

Spinal Accessory

CN-XI enters and exits where?

Enters via foramen magnum Exits via jugular foramen

What is the function of CN-XI?

Motor to trapezium and sternocleidomastoid

Is CN-XI sensory, motor, or both?

Motor

What test(s) are used to assess CN-XI?

Shoulder shrug Push head against resistance

CN-XII is also called what?

Hypoglossal

What is the function of CN-XII?

Motor to muscles of the tongue

What test(s) are used to assess CN-XII?

Tongue movement Observe for fasciculations Test strength by having the patient press tongue against the buccal mucosa on each side while you press a finger against the patient’s cheek

Is CN-XII sensory, motor, or both?

Motor

CN-XII exits where?

Exits via hypoglossal canal

What tests are used to assess the cerebellum?

Romberg test Heel to shin test Finger to nose Heel and toe walking Rapid alternating movements of UE and LE

Test strength in upper and lower extremities proximally and distally using the motor Grading system - describe grades 0-5

5 – active motion against full resistance 4 – active motion against some resistance 3 – active motion against gravity 2 – active motion with gravity eliminated 1 – barely detectable motion 0 – no motion or muscular contraction detected

Reflex testing of brachioradialis and biceps is testing what CNs?

C5-C6

Reflex testing of triceps is testing what CNs?

C7-C8

Reflex testing of quadriceps (knee) is testing what CNs?

L3-L5

Reflex testing of ankle (achilles) is testing what CNs?

S1-S2

Describe the levels of reflex testing grading system 0 to 4+

4+: hyperactive with clonus 3+: brisker than usual 2+: normal 1+: decreased or less than normal 0: absent

Name the two pathologic reflexes

Babinski Sign Hoffman sign

Arterial circulation of the brain is separated by what?

separated by Circle of Willis

What artery(s) make up the anterior circulation?

Carotid arteries

What artery(s) make up the posterior circulation?

Vertebral arteries Basilar arteries

What artery(s) make up the middle circulation?

Middle cerebral artery