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NEUROPHYSIOLOGICAL TESTS

 

EMG - recording of the muscle electrical activity, to facilitate diagnosis of muscle diseases and changes in their function for different reasons.

Restrictions in Conducting the Test:
The test is not to be conducted in patients who receive blood thinners (anti-coagulants). When patients are referred for this test, it is mandatory that they temporarily stop taking these medications for a few days before the test is carried out.

Test Procedure:
During the test patients lie on their back. The attending physician instructs patients to contract and relax the muscle (which will be examined at rest and at extended effort). Very fine disposable syringes are inserted into the muscle. The number of tested sites (the muscles) depends on the reason behind the referral. The test involves slight discomfort, which usually does not last too long. Slight pain may be felt in the test area for a few hours subsequent to the test. The test is approximately 30 minutes long.

NCV - nerve conduction test conducted to examine the condition of peripheral nerves and any defects therein.

Test Procedure:
The attending physician will attach electrodes on the muscle and/or the nerve undergoing testing. The number of stimulations given via the electrodes is contingent upon the reason for the referral. The test involves the sensation of discomfort (usually painless) during the electrical stimulations. The test entails no risk. There are no other side effects during this 30-minute test or thereafter.

EEG –brain electrical activity mapping to measure the brain`s electrical activity.

Test Procedure:
A technician applies 20 electrodes to the surface of the patient`s head, with clear gel, which does not stain clothing. During the test the patient is instructed to close his or her eyes (simply, or against a flashing light) and to breathe deeply. Complete cooperation is necessary during this test to obtain an accurate diagnosis. An electro encephalogram is sometimes even performed during natural sleep, or under mild sedation.

VEP – BERA – this test records the visual and auditory nerve responses, in several conditions, such as impaired balance and vertigo of all kinds.

Test Procedure:
Technically BERA is almost identical to EEG. In cases of serious visual defects as a result of ocular disease, it is recommended to undergo a VEP in an eye clinic.

TCD – A complete measurement of cerebral circulation, which is carried out to assess speech functions, memory, attention, attentiveness and comprehension in different situations e.g. stroke, depression, post head-trauma, age related conditions and other complications. 

The Neuro-immunology Laboratory
The neuro-immunology laboratory conducts specific testing for the diagnosis of autoimmune disorders of the nervous system.

The tests:

  1. Oligoclonal immunoglobulin in cerebrospinal fluid to detect multiple sclerosis and brain inflammation
  2. Transfer of beta-2 to detect cerebrospinal fluid leaks
  3. Alpha-fetoprotein to detect birth defects in the nervous system, Hepatoma and pregnancy 
  4. Myelin basic protein and antibodies to myelin to detect myelin destruction
  5. Anti-MAG antibodies and counteragents/antibodies against galactocebroside to detect peripheral neuropathy
  6. Antibodies against gangliodies: GM1, GD1a, GD1b, GQ1b to detect peripheral nervous system disorders
  7. Antibodies to the acetylcholine receptor to detect myasthenia gravis
  8. Antibodies to pre-neoplastic diseases Hu, Yo, Ri, Ma and to calcium channels to detect secondary phenomena of injuries to the nervous system and in a case of malignant disease.