NMS Flashcards
What are the Cranial nerves?
- oflactory
- optic
- oculomotor
- trochlear
- trigeminal
- abducens
- facial
- vestibulocochlear
- glossopharengeal
- vagus
- spinal accessory
- hypoglossal
Olfactor (I)
* S/M
* T
* dx
- S/M : sensory
- T : smell is tested one nostril at a time with eyes closed
- dx : Anosmia = lost sense of smell
: parosmia = distorted sense of smell
Optic (II)
* S/M
* T
- S : sensory
- T : Snellen chart =visual acuity
:Visual fields = peripheral vision
: Direct light reflex = CN2 (s) + CN3(m)
: Indirect (consensual ) light reflex CN 2 +CN3
: Accomodation = eyes converge, pupuls contrict , lens
convexity
Oculomotor (III)
* S/M
* T
* detail
* dx
- M : Levator palpebrae, Inferior oblique , Superior+medial+inferior rectus
: Ciliary muscles = parasympathetic
= for lense shape
: constrictor papillae - T : Direct light reflex, indirect light reflex, accomodation
- dx : strabismus = deviation of one or both eyes
: ptosis = eyelids droop d/t weakness or paralysis of
levator palpabrea
: Myastenia gravis = when ptosis is bilateral
: Horner’s syndrome = when ptosis is unilateral
What is tested with six cardinal fields of gaze?
SO4LR6I3
Trochlear (IV)
* S/M
* T
- M : Superior Oblique (down and in)
- T : six cardinal fields of gaze
Trigeminal (V)
* S/M
* T
- S: sensory to face : V1-V3
: Corneal reflex (V and VII )
= touch cornea w/ cotton wisp, both
needs to link or tear normally
: Oculocardiac reflex (V and X)
= press on eye, heart rate should
decrease
: general sensation to ant 2/3 of tongue - Motor : muscles of mastication ( T I M E ) E = only one that
open jaw = Temporalis , Internal Pterygoid, Masseter
external pyterygoid - dx : Tic Douloureaux
Tic Douloureaux
* AKA:
* symptom:
* What CN :
* Age :
- AKA: trigeminal neuralgia
- symptom : burning, shock- like face pain that last up to 2
minutes
: pain is felt on one side of jaw or cheek - What CN : 5
- Age : Over 50
Abducens (VI)
S/M
M : LR 6
Facial (VII)
S/M :
Dx:
- Sensory : taste to ant 2/3 of tongue ( sweet sour salty
- Motor : muscles of facial expression
: wrinkles on forehead - Dx : bells palsy
Sensory for tongue?
ant 2/3 of tongue
posterior 1/3 ?
- ant 2/3 Facial
- post 1/3 glossopharyngeal
Bells palsy
* detail
* CN
* symptom
- Detail : Unilateral facial paralysis caused by trauma, virus or immune mediated response
: not permanent - CN
- symptom : initial pain behind the ipsilateral ear
: twitching, weakness or parlysis, drooping of
eyelid, drooping corner of mouth and drooling,
dry eyes and impairement on taste
Bells palsy vs Stroke
* where is motor loss
* wrinke or not
* where is lesion
- bells palsy = ipsilateral motor loss on ENTIRE face
= forehead does not wrinkle ( because entire face is not working )
= LMNL CN 7 - stroke = contralateral motor loss BELOW the eyes
= forehead does wrinkle
= UMNL CN 7
Vestibulochlear (VIII)
Sensory :
Dx :
- Sensory : balance = Mittlemeyer
= barany caloric test
= rhomberg test
Hearing : Weber, Rinne, whisper, auditory acuity /watch - DX : meniere’s dx
Mittlemeyer
* CN
* test
- 8
- patient marching
- open eyes = cerebellum
- closed eyes = posterior column
Barany Caloric test
*
- COWS = cold opossite warm same
- patient will have nystagmus to the side to side up or down
- COWS = normal
Rhomberg
- standing, arms out, head back
- open eyes = cerebellum
- closed = posterior column
Meniere’s dx
* AKA :
* cause :
* symptom :
* management :
- AKA : endolymphatic hydrops
- cause : unknown, but could be from abnormality in fluids of
inner ear - symptom : rotational vertigo, hearing loss, tinnitus
- management :ENT adjust
Glossopharngeal (IX)
* S/M
*
- Sensory : Gag reflex ( pharyngeal) IX and X
: Uvula reflex IX and X, uvula will move contralateral from side of lesion when patient says “AHHH”
: carotid reflex IX and X , massage carotid and heart rate drops
: posterior 1/3 taste of tongue ( bitter) - Motor : stylopharngeus muscle : elevates pharynx and larnyx; dilates pharynx to permit swallowing
Vagus (X)
* S/M
*
- sensory : epiglotis
- Motor : gag reflex IX & X
: uvular reflex IX & X
: laryngeal muscles of swallowing ( palate ,pharynx , contracting muscles )
: occulocardiac V & X
Spinal accessory (XI)
* S/M
*
- trapezius
- SCM
- shoulder shrug
*
Hypoglossal
- tongue muscles
- stick out tongue
- deviation to side of lesion, look for atrophy and fasciculations
Reflex
- involuntary motor response to potentially harmful stimuli
Wesphalt’s sign
- absense of DTR, especially patellar (LMNL)