Health potentials and health problems

Find articles by Ingunn Hagen Usha S. Nayar Find articles by Usha S. Received Dec 19; Accepted Mar The use, distribution or reproduction in other forums is permitted, provided the original author s or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice.

Health potentials and health problems

Health potentials and health problems

Sensory evoked potentials studies measure electrical activity in the brain in response to stimulation of sight, sound, or touch. When the brain is stimulated by sight, sound, or touch, signals travel along the nerves to the brain. There, electrodes detect the signals and display them for your doctor to interpret.

Sensory evoked potentials studies involve 3 tests that measure response to visual, auditory, and electrical stimuli. Visual evoked response VER test. This test can diagnose problems with the optic nerves that affect sight. A healthcare professional places electrodes along your scalp to record the electrical signals as you watch a checkerboard pattern flash for several minutes on a screen.

Brainstem auditory evoked response BAER test. This test can diagnose hearing ability and can point to possible brainstem tumors or multiple sclerosis. A healthcare professional places electrodes on your scalp and earlobes and delivers auditory stimuli, such as clicking noises and tones, to one ear.

Somatosensory evoked response SSER test. This test can detect problems with the spinal cord that cause numbness of the arms and legs.

He or she will apply a mild electrical stimulus through the electrodes. Electrodes on your scalp then determine the amount of time it takes for the current to travel along the nerves to the brain. Why might I need a sensory evoked potentials study?

Your doctor may order these tests to assess hearing or sight, especially in infants and children. They are also done to diagnose disorders of the optic nerve, and to detect tumors or other problems affecting the brain and spinal cord.

They are also used to assess brain function during a coma. These tests usually do not lead to a specific diagnosis about what is causing the abnormality.

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However, the evoked potentials test can sometimes confirm a diagnosis of multiple sclerosis. What are the risks of a sensory evoked potentials study? The sensory evoked potential studies are considered safe procedures. The tests can cause a little discomfort. There may be risks depending on your specific medical condition.

Certain factors or conditions may interfere with the results of the test. Severe nearsightedness Presence of earwax or inflammation of the middle ear Severe hearing impairment Muscle spasms in the head or neck How do I get ready for a sensory evoked potentials study?

Ask your healthcare provider to tell you what you should do before your test. Below is a list of common steps that you may be asked to do: You will sign a consent form that gives your permission to do the test.

Health potentials and health problems

Read the form carefully and ask questions if something is unclear. You will not receive sedation. Wash your hair the night before the test, but do not use conditioner or apply any hairspray or other hair products.

What happens during a sensory evoked potentials study? A sensory evoked potentials test may be done on an outpatient basis or as part of your stay in a hospital.

Talk with your healthcare provider about what to expect during your test. Generally, the test follows this process: You will be asked to remove any clothing, jewelry, hairpins, eyeglasses, hearing aids, or other metal objects that may interfere with the procedure.

If you are asked to remove clothing, you will be given a gown to wear.Sensory evoked potentials studies involve 3 tests that measure response to visual, auditory, and electrical stimuli. Visual evoked response (VER) test. This test can diagnose problems with the optic nerves that affect sight.

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