Finals Neurology OSCE
Finals Neurology OSCE
STEP 2:
• For the second trial, compress the opposite nostril and this time do not present the stimulus.
• Withholding the stimulus, tests the Pt’s suggestibility and attentiveness.
• Wait a moment for the Pt to perceive the presence or absence of odour.
STEP 3
• For the third trial, present the stimulus to the untested nostril (left nose).
• Wait a moment for the Pt to perceive the presence or absence of odour.
• HYPOSMIA- Partial loss of the sense of smell.
• ANOSMIA (anospharasia)- Complete loss of the
sense of smell.
• HYPEROSMIA- Increased olfactory acuity, hysteria,
psychotic state, in migraine, hyperemesis gravidarum
(most common cause)
• PAROSMIA- Perversion of smell (sweet smell is
interpreted as bad odour).
• CACOSMIA-Disagreeable odours, appears in psychic
state, follow head trauma especially to the uncus.
REPORTING:
• The olfactory sensation of the patient is intact as he/she was able to identify the test material correctly on both nostrils/sides.
• If the patient is not able to identify the odour then use an otoscope to check for any blocks are damages.
The Optic nerve is tested in the following ways:
1. Visual Acuity
• Visual acuity is tested using Snellen charts.
• If the patient normally wears glasses or contact
lenses, then this test should be assessed both
with and without their vision aids.
• Start from the bigger letters going down.
2. Colour
• Colour vision is tested using Ishihara
plates which identify patients who are
colour blind.
3. Visual Inattention
• Visual inattention can be tested by
moving both fingers at the same time
and checking the patient identifies this.
4. Visual Field- Confrontation test
• Station yourself directly in front of the patient.
• Start with your left eye directly in line with the Pt’s right eye, at a
distance of about 50 cm.
• The Pt covers the left eye with the left hand.
• Hold up your left index finger just outside your own peripheral
field, in the inferior temporal quadrant. Patient should not see your
finger initially.
• Hold the finger about equidistant between your eye and the Pt’s.
Wiggle the finger slowly and move it very slowly toward the
central field.
• Request the Pt to say “now” as soon as the wiggling finger is seen.
• Try to match the perimeter of the Pt’s visual field against your
own.
• Test all quadrants of each eye separately, each time starting at the
limit of the field.
• You can also ask the patient to tell how many digits does he see
instead of wiggling your finger.
5. Visual Reflexes- Pupillary reflex
• Visual reflexes comprise direct and concentric
reflexes.
• Place one hand vertically along the patients
nose to block any light from entering the eye
which is not being tested. Shine a pen torch
into one eye and check that the pupils on both
sides constrict. This should be tested on both
sides.
• Alternately swing the light from one eye to
the other and hold it on the new eye for 3- to
5-second intervals.
• Watch for equal reactions of both pupils.
• If the Pt has an afferent defect in one optic
nerve (e.g., due to o optic neuritis), the pupils
will dilate as the light swings from the normal
to the affected eye. (Marcus-Gunn pupil or
relative afferent pupillary defect) rather than
maintaining the same degree of constriction.
6. Fundoscopy:
• Finally, fundoscopy should be performed on both eyes.
• Direct the ophthalmoscope 15 degrees from center and look
for the RED REFLEX.
• Simply follow the red reflex in until you see the retina. If
you lose the red reflex, come back until you find it again
and repeat.
• Focus on a retinal vessel.
• After locating a retinal vessel, follow it along until you find
the optic disc.
• Next, identify the pigment ring around the disc (grayish
pigment around the disc), note the disc colour (usually
yellowish or pinkish), and the presence or absence of a
physiologic cup.
• If present, the physiologic cup is white as compared with
the rest of the disc and occupies about 30% of the disc.
• Identify the arteries, the thin, brighter appearing vessels,
and the thicker, duller appearing veins.
• Look for venous pulsations
• Normal AV ratio is 2:3
REPORTING:
• Visual acuity (II) is good bilaterally with 20/20 vision on hand-held
chart (while wearing his corrective lenses, if relevant).
• No color blindness is noted.
• Visual fields are full to confrontation in all quadrants.
• Pupils are equally round and reactive to light.
• Normal red-orange reflex is noted.
• On fundoscopic exam, the optic disc is visualized without any
abnormalities.
• Ask the patient to keep their head perfectly still.
• Draw a large ‘H’ in front of your patient using your fingers
and instruct them to follow your fingers with their eyes only.
• Observe for the movements of the eyes.
• Hold your index finger in front of the patient and ask the
patient to concentrate on your finger.
• Slowly advance your index finger until you reach the root of
the nose. (test for Accommodation)
• Observe for the movements of the eyes.
• Test for Pupillary light reflex in both the eyes.
• Also note for any abnormalities in the patients eyelids as the
levator palpebrae superioris muscle is also innervated by the
CN-3. This muscle helps in elevation of the eyelid.
*** Patient should not move their head while following the
examiner’s finger.
• Lateral rectus - Look to the sides
• Medial rectus – Look nasally/Inside/Inward
• Superior rectus – Look up
• Inferior rectus – Look down
• Inferior oblique - Look up, Adduction, Extorsion
• Superior oblique - Look down, Abduction, Intorsion.
Abnormal Findings:
• Esotropia – eyes turn in
• Exotropia – eyes turn out
• Hypertropia – one eye is higher than other
• Internuclear Ophthalmoplegia – infarct/demyelination in between CN III and VI nucleus.
• Diplopia – double vision
REPORTING:
• Extraocular movements are intact (III, IV, VI), with no ptosis and palsy.
• Normal pupillary reflex is noted.
• Inspection: Inspect the temples and cheeks for
atrophy of the temporalis and masseter muscles.
The temporal muscle fills out the temple. Even
when the Pt bites, the muscle is difficult to palpate,
but after temporalis muscle atrophy, the temple
sinks in. In myotonic dystrophy, the chewing
muscles and sternocleidomastoid muscles atrophy.
The masseters of some individuals undergo
hypertrophy and stand out strongly.
REPORTING:
• Facial muscle (VII) strength is normal and equal
bilaterally.
• Taste sensation is normal
• No abnormal facial movements were noted
• Assess gross hearing
• Ask the patient to close his/her eyes
• Now whisper in his ears and ask if he/she hears
something with the other ear closed
• You can also ask your patient to repeat what you said
if your are using numbers or words.
• You can also rub your fingers instead of whispering
but make sure the patient’s eyes are closed and test
both the ears.
It is better if you ask you patient to close
his/her eyes and you will be the one to close the
ear not being test.
• Always strike your tuning fork against a surface that doesn’t make noise. (E.g
your palmar surface)
1. Weber’s Test
2. Rinne’s Test
• Ask patient to march on the spot with arms outstretched and eyes closed
RESULTS:
• Normal – patient remains in the same position
• Vestibular lesion – patient will turn towards the side of the lesion
6. Dix-Hallpike Manoeuvre
VI - Abducens Moves the eye laterally. (Innervates lateral rectus muscle) Exits the skull via the superior orbital fissure.
VII - Facial Muscles of facial expression. Taste to the anterior 2/3 of the tongue. Exits the skull via the internal acoustic meatus and the
Tear & salivary ducts. Innervates stapedius muscle. skull itself via the stylomastoid foramen.
VIII - Balance (vestibular division). Hearing (cochlear division). Exits the skull via the internal acoustic meatus.
Vestibulocochlear
IX - Taste for posterior 1/3 of tongue. Sensation to pharynx. Innervates Exits via the jugular foramen.
Glossopharyngeal stylopharyngeus.
X - Vagus Parasympathetic innervation to all viscera above splenic flexure. Exits via the jugular foramen.
Innervates laryngeal muscles and controls cough reflex.
XI - Accessory Spinal portion innervates SCM & Trapezius. Cranial portion runs Exits via the jugular foramen.
with Vagus nerve.
XII - Hypoglossal Innervates all tongue muscles apart from palatoglossus (innervated Exits via hypoglossal canal.
by the vagus nerve).
1. Shoulders
• ABduction (C5) – “Don’t let me push your shoulders down”
• ADduction (C6/7) – “Don’t let me pull your arms away from
your sides”
2. Elbow
• Flexion (C5/6) – “Don’t let me pull your arm away from you”
• Extension (C7) – “Don’t let me push your arm towards you”
.
3. Wrist
• Extension (C6) – “Cock your wrists back and don’t let me pull
them down”
• Flexion (C6/7) – “Point your wrists downwards and don’t let
me pull them up” Finger extension
4. Fingers
• Finger extension (C7) and flexion (C8) – “Put your fingers out Finger flexion
straight and don’t let me push them down”
• Finger ABduction (T1) – “Splay your fingers and don’t let me
push them together”
• Be mindful to use the same finger/ hands as that of your patient
5. Scapular
• Adduction:
• With the hands on the hips, the patient forces the elbows backward
as hard as possible. Standing behind the patient, the examiner tries to
push them forward at the elbow
• Winging:
• Have the patient try a push-up or lean forward against a wall, supporting the body with outstretched
arms
6. Hip
• Flexion (L1/2) – “raise your leg off the bed and stop me from pushing it down”
• Extension (L5/S1) – “stop me from lifting your leg off the bed”
• ABduction (L4/5) – “push your legs out”
• ADduction (L2/3) – “squeeze your legs in”
7. Knee
• Flexion (S1) – “bend your knee and stop me from straightening it”
• Extension (L3/4) – “kick out your leg”
8. Ankle
• Dorsiflexion (L4) – “keep your legs flat on the bed…cock your foot up towards
your face…don’t let me push it down”
• Plantarflexion (S1/2) – “push down like on a pedal”
• Inversion (L4) – “push your foot in against my hand”
• Eversion (L5/S1) – “push your foot out against my hand”
9. Big toe
• Extension (L5) – “don’t let me push your big toe down”
10. Back muscles
• Pt prone, ask the Pt to arch the back and rock on the stomach. Inspect and palpate the paraspinal muscles.
• Have the pt bend forward at the waist and straighten up. If you try to oppose the pt’s straightening up from a bent
waist (you may cause a back sprain or herniation of an intervertebral disc)
8. Point Localization
→Ask the patient to close his eyes
→Touch patient’s skin
→Ask the patient to open eyes and point where he was touched
→Test symmetrically
9. Extinction
→Ask the patient to close his eyes
→Simultaneously stimulate both sides of the body (touch the patient on both sides of the body:
arm
→Ask how many points felt and where (let the patient identify whether it’s left, right or both
REPORTING:
• Intact bilaterally for pain (spinothalamic tract), position & vibration
(posterior columns), along with light touch.
• Cortical discrimination intact with: localization, 2-point
discrimination, graphesthesia.
• Romberg’s test is negative with no pronator drift.
Different methods for evaluating the Patellar reflex
Cremasteric reflex for males.
• The testis on the side of
stimulation ascends
REPORTING:
• Biceps, brachioradialis, triceps, patellar, and Achilles are 2/4
bilaterally.
• No clonus was noted.
1. Finger to Nose test - Dysmetria
2. Nuchal Rigidity:
• Procedure: While the patient is in supine position, the neck is first flexed side to side to rule out neck paratonia which may be
due to conditions other than meningeal irritation.
• Positive sign: The extensors tense up and the trunk is maintained in a straight position as you lift the back
of the head from the bed even with just one finger.
3. Brudzinski’s Sign:
• Procedure: Passive neck flexion or turning it to one side.
• Positive sign: Passive flexion of the knees and hips.
4. Kernig’s Sign
• Procedure: one hip is flexed at 90 degrees and the other leg
remaining in the neutral position on the bed. The examiner
tries to extend the flexed knee.
• Positive sign: resistance or pain in the lower or back or
posterior thigh. The leg cannot be fully extended at the
knees.
***It must be bilateral, otherwise it might be due to a lumbar
radiculopathy.
5. Head-jolt test:
• Procedure: Ask the patient to turn his or her head
horizontally at a frequency of two to three rotations per
second.
• Positive sign: worsening of a baseline headache
REPORTING:
• The patient has no signs of meningeal irritation with all the tests
bearing a negative result
1. Dix-Hallpike Manoeuvre
• Rotate patient’s head 45 degrees to the right
• With the head supported and eyes open, the patient lies down rapidly and placed into a head
hanging position (Right ear down position, Chin pointed upward)
• Note occurrence of vertigo; repeat on the contralateral side.
• Observe direction, latency and duration of nystagmus
2. Head-Thrust Test
• Patient is instructed to focus on examiner’s nose.
• Head is quickly moved 5-10 degrees to one side.
• Abnormal response if there is a corrective saccade.
3. Epley’s Manoeuvre – Posterior Canal
1. Level of Alertness
• Alert and oriented
• Disoriented/drowsy
• Somnolent
• Stuporous
• Comatose
3. Memory
1. Immediate memory
• word lists (manga, mesa, pera)/number lists and let the patient repeat
2. Recent memory
• Memory for 3 items after a 3-minute distraction task. How to distract: perform serial seven, recite months
backwards
3. Working Memory
• normal digit span for adults is 7 digits
• Forward digit span (742, 25814679)
4. Remote memory/Long term memory
• These are important events that took place decades earlier. Engraved in cerebrum.
• Short term memory is stored in limbic system only. Remote memory already engraved to frontal lobe
• Last to go when the patient has dementia
4. Language
A. Test for Aphasia
1. Fluency
• phrase length and rate, abundance of spontaneous speech, word finding difficulty, paraphasia
substitute unnecessary syllables like apple to papple, seen in Wernicke’s aphasia),
neologisms(non sensical words or completely novel wordlike people to spodle. Seen in
Wernicke’s aphasia, not Broca’s), errors in grammar
• Neuroanatomical correlate: dominant frontal (Left), temporal or parietal, subcortical white
matter, thalamus, caudate
2. Comprehension: ask simple questions & commands (raise your arms; put your left hand to
your right ear)
3. Naming: name simple things (watch, ballpen)
4. Repetition: patient is told to repeat: “No ifs, ands, or buts,” or “ Walang pa peropero pa.”
5. Reading: how they pronounce and how well they comprehend
6. Writing: ask the patient to copy something you write or from a book/paper.
B. Test for Apraxia
• Inability to follow a motor command that is not due to a primary motor deficit or a language
impairment
• Caused by a deficit in higher-order planning or conceptualization of the motor task
1. Ideomotor Apraxia: ask patient to show you how to “brush his teeth” or “blow a match”
2. Ideational/ Conceptual Apraxia: Give objects and ask how to write, put on lipstick or comb hair
3. Bucco facial/Orofacial Apraxia: Ask patient to lick, pucker lips or whistle
4. Oculomotor Apraxia: difficulty moving the eye, especially with saccade movements that direct the
gaze to targets
5. Constructional Apraxia: Ask patient to copy a drawing or a complex figure
6. Gait Apraxia:
• Ask patient to stand up and walk (positive result: patient stands up but cannot walk)
• Test for strength: ask patient to lie down and ask them if they can kick, there is no problem involving
weakness but there is a problem in motor planning
7. Speech Apraxia: Difficulty planning and coordinating the movements necessary for speech
• Eg. Instead of saying Potato patient says Totapo.
5. Sequencing tasks
• Patients with frontal lobe dysfunction may have particular
difficulty in changing from one action to the next when asked to
perform a repeated sequence of actions.
1. Perseveration: Alternating triangles and squares: problem in frontal
lobe indicates that you have perseveration, instead of alternating
triangle and squares, there is perseveration of either triangles or squares
2. Luria sequencing task: test of frontal lobe; perform the “fist-slice-
palm” ; demented persons are not able to perform this.
3. Inhibition Response: Go No Go test: test for the ability to suppress
inappropriate behaviours
• If examiner taps table once, patient taps twice if examiner taps the
table twice patient does not tap
• Test for inhibitory control, frontal lobe controls the inhibitory
mechanism
• Adolescents have poor impulse control because frontal lobe is not
fully myelinated.
• If you have a problem in your frontal lobe then you won’t be able to
do this.
MMSE → Mini-Mental State Exam
• Measures cognitive impairment such as in a
person with suspected dementia
Interpretation:
• 23 and above – normal
• 22 and below – dementia
MoCA → Montreal Cognitive Assessment test