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Cranial Nerves
Cranial Nerves
37
Medical
Professional
08/31/2014

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Cards

Term
CN III
Definition
The position of the affected eye (lateral, downward deviation of gaze), indicates damage to?
Term
Sensory = CN II Motor = CN III
Definition
The pupillary light reflex pathway has a sensory limb (CN ?) and motor limb (CN ?).
Term
the consensual response
Definition
constriction of the pupil of the unstimulated eye = ?
Term
optic nerve damage, oculomotor nerve damage, brain stem death and depressant drugs, such as barbiturates.
Definition
Lack of the pupillary reflex or an abnormal pupillary reflex can be caused by ?
Term
Lateral rectus looks up and in, Superior oblique looks down and in; CN III controls all other eye movements.
Definition
Draw a diagram and explain: LR6, SO4/3
Term
CN III
Definition

What nerve constricts the pupil, a movement known as Miosis; opposite, Mydriasis, is the dilation of the pupil; the ciliaris muscle contracts = accommodation.

The accommodation reflex is a reflex action of the eye, in response to focusing on a near object, then looking at distant object (and vice versa), comprising coordinated changes in vergencelens shape and pupil size (accommodation). It is dependent on cranial nerve II (afferent limb of reflex), superior centres and cranial nerve III.The change in the shape of the lens is controlled by the cilliary muscles inside the eye. Changes in contraction of the ciliary muscles alter the focal distance of the eye, causing nearer or farther images to come into focus on the retina; this process is known as accommodation.[1] The reflex, controlled by the parasympathetic nervous system, involves three responses; pupil accommodation, lens accommodation, and convergence.

Term
CN III
Definition
What nerve has motor control of direct and indirect light reflex (pupil)?
Term
Deviation of one or both eyes (CN III).
Definition

What is strabismus?

What nerve?

Term
CN III and levator palpebrae.
Definition
What nerve and muscle are related to ptosis?
Term
CN III
Definition
Nerve controlling motor of accommodation?
Term
Motor: CN VII...Sensory: CN V.
Definition
What 2 nerves control the motor and sensory of the blink reflex?
Term
Press on the eye and the HR decreases (CN V and X).
Definition
What is the oculocardiac reflex?
Term
CN V
Definition
Sensation of the anterior 2/3 of tongue?
Term
CN VII
Definition
Taste of anterior 2/3 of tongue?
Term
CN V
Definition
Nerve controlling muscles of mastication?
Term
Trigeminal (CN V) Neuralgia: extreme, sudden, shocking or burning face pain; episodic; provoked by jaw movement.
Definition
What is Tic Douloureux?
Term
CN VII
Definition
Muscles of facial expression; CN?
Term
Unilateral facial paralysis; trauma, virus, immune: initial pain behind ear; twitching weakness or paralysis; drooping eyelid, drooping corner of mouth, drooling, dry eye; impaired taste. (Tx: artificial tears/ eye patch)
Definition

What is Bell's Palsy?

Causes?

Tx?

Term
Bell's Palsy: he cannot wrinkle forehead. Stroke: he can wrinkle forehead.
Definition
How would you differentiate Bell's Palsy from stroke?
Term

Cold = opposite nystamus

Warm = same side nystagmus

 C O W S

Definition
What is the mnemonic for the Barany Caloric Test?
Term
 Ask the patient to close their eyes. This leaves only two of the three systems remaining and if there is a vestibular disorder (labyrinthine) or a sensory disorder (proprioceptive dysfunction-dorsal column) the patient will become much more imbalanced.
Definition
How does the Romberg test evaluate CN VIII?
Term

 

Atype of hearing loss in which the root cause lies in the vestibulocochlear nerve (cranial nerve VIII), the inner ear (cochlea), or central processing centers of the brain. 

Definition

 

What is Sensorineural hearing loss (SNHL)?

Term
 It is a problem conducting sound waves anywhere along the route through the outer ear, tympanic membrane (eardrum), or middle ear ( the malleus, the incus and stapes of the middle ear/ossicles).
Definition

 

What is Conductive hearing loss?

Term
Meniere's Ds
Definition
What is aka; Endolymphatic Hydrops?
Term
Episodic rotational vertigo, hearing loss and tinnitus.
Definition
What are the symptoms of Meniere's Ds?
Term
Elevates the pharynx & larynx; dilates pharynx to permit swallowing (stylopharyngeus myo.)
Definition
What is the action of the glossopharyngeal nerve?
Term
Glossopharyngeal nerve (CN IX)
Definition
Provides taste to the posterior one third of the tongue?
Term
Sensory: CN IX
Motor: CN X
Definition
What nerves control the gag, uvula and carotid reflexes?
Term

CN X

(CN IX elevates pharynx to assist swallowing)

Definition
What nerve controls the muscles of swallowing?
Term

CN X = Opposite with "Ahhh"

 

(CN XII lesion = tongue deviates to SAME side as lesion)

Definition
CN X lesion; palate and uvula deviate to ? side?
Term
CN XI; Spinal Accessory
Definition
Trapezius & SCM: shoulder shrug with head rotation against resistance; what CN?
Term
CN XII; Hypoglossal
Definition
Tongue muscles: Stick out tongue; deviation to side of lesion; look for atrophy and fasciculations; CN ?
Term
Absence of any DTR, especially patellar = LMNL
Definition
What is Westphalls sign?
Term
Brings out reflexes by cortical distraction
Definition
What is Jendrassik's maneuver aka reinforcement test?
Term

0+ = absent with reinforcement (LMNL)

1+ = hypo' w/no reinforcement or (N) w/reinforcement (LMNL)

2+ = (N)

3+ = hyperactive (UMNL)

4+ = hyperactive with transient clonus (UMNL)

5+ = hyperactive with sustained clonus (UMNL)

Definition
What is the Wexler scale?
Term
Gag, uvula, carotid. These all involve cranial nerve IX has the sensory and cranial nerve X as the motor.
Definition
What are the three reflexes involving the glossopharyngeal nerve?
Term
cranial nerve IX; Glossopharyngeal
Definition
What controls the taste to the posterior one third of the tongue?
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