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Romberg's sign: This is a test for
ataxia (incoordination or clumsiness of movement that is
not the result of muscular weakness) and involves standing with your feet together with your eyes closed. Ataxics
have great problems standing still under these conditions.
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Gait and Coordination: The neurologist evaluates ataxia in various parts of the body by observing the patient walking normally, walking heel-to-toe
and finger-to-nose tests. The neurologist will also be looking for intention tremor (shaking when performing small motor
movements) as well as ataxia in this last test.
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Heel/Shin test: This is a test for ataxia and
cerebellar dysfunction. You have to bring the ball of your
heel onto the knee of your other leg and then move it down the
shin.
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L'Hermittes sign: This is a test for
lesions on the spinal cord in the neck. The neurologist
will ask you to lower your head towards your chest. A positive L'Hermittes will generate buzzing, tingling or
electrical shock sensations in one or more parts of the body.
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Optic
Neuritis: This is a condition of the eye caused
by inflammation and demyelination of the
Optic Nerve and is
perhaps the most commonly presenting symptom in MS. The tests
involve the ubiquitous reading of letters from a board and a
test for colour vision using an "Ishihara" colour chart. An
examination with an opthalmoscope will reveal pallor of the
optic nerve in old optic neurites.
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Hearing Loss: This is done by lightly clicking the
fingers next to each ear and asking the patient which ear the
click was done next to.
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Muscle Strength: This involves resisting the
neurologist with various muscle groups. Differences in
strength between left and right sides are easier to evaluate
than symmetrical loss unless the weakness is severe.
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Reflexes: This is done with both ends of the
hammer. The reflexes can be normal, brisk, i.e. too easily
evoked, or non-existent.
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Chaddock's Sign: Similar to Babinsky's but testing
for lesions in the corticospinal tract. The neurologist
touches the skin at the outside of the ankle. A positive
response in upwards fanning of the big toe just like in
Babinski's test.
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Hoffman's sign: This is also similar to Babinski's but involves the hands rather than the feet. Again it tests for
problems in the corticospinal tract. The test involves tapping the nail on the third or forth finger. A positive
response is seen in flexion of terminal phalanx of thumb.
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Doll's Eye Sign: The neurologist is looking for dissociation between movement of the eyes and of the head. A positive
response is when the eyes moves up and head moves down.
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Sensory: This is done with tuning forks and pins
and tests the level of sensory perception in certain parts of
your body.
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Lumbar
puncture (spinal tap)
for collection of Cerebrospinal fluid
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A neurological exam
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VEP (Visual Evoked Potential) - VEP are similar to
somatosensory potentials; however, the stimulation is applied
as patterns or flashes of light seen by the eye, and the
brain's response to the visual stimulus is then assessed with
EEG electrodes. The VEP will detect loss of
vision from
optic nerve damage (in particular, damage caused by multiple
sclerosis). The patient sits close to a screen and is asked to
focus on the center of a shifting checkerboard pattern. Only
one eye is tested at a time; the other eye is either kept
closed or covered with a patch. Each eye is usually tested
twice. Testing takes 30-45 minutes.
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SEP (Sensory Evoked Potential)
- SEP use EEG electrodes to record the response of the brain
to a sensory stimulus. Usually a small electrical pulse is
given at the wrist or behind the knee. The response in the EEG
is then measured. The pulse needs to be repeated at least
several hundred times in order to have enough of a signal to
analyze. From this information, the evaluator may determine
whether there is a delay in conduction to the brain, a
blockage at any point, or abnormally low or high activity in
the brain.
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BAER ( Brainstem Auditory Evoked
Response)
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