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Programs and services : Neurodiagnostics

Sanford Neurodiagnostics


Related services
The Sanford Neurodiagnostics team performs several different studies to help doctors diagnose problems of the spinal cord or brain. These studies include the balance function exam, the electroencephalography exam and the evoked potential exam.

Videonystagmography testing (VNG)

Click here for instructions to prepare for this exam »

VNG testing utilizes cameras that are imbedded into goggles to monitor and measure eye movement.  It is a series of several tests that helps determine:

  • How well your eyes communicate with your balance system and your brain
  • Whether a change in position of the head causes dizziness or imbalance
  • Whether your balance organs are functioning equally when compared to each other

When you arrive at Sanford Neurodiagnostics for your appointment, you will be asked to complete a questionnaire regarding your symptoms and experiences.  Once the questionnaire is completed, you will be taken into the VNG room and will be asked to sit in the exam chair or on a table. Goggles will then be placed over your eyes and the exam will begin.
 The VNG consists of three parts:

  1. You will be asked to watch a series of targets on the video screen or LCD screen.  This is very simple, but will yield important information about how well your eyes are communicating with your brain.
  2. The examiner will assist you into several different positions.  This helps to determine whether a change in the position of your head and/or body will evoke the unpleasant symptoms that you have described.
  3. The final test in the VNG is caloric irrigation. The examiner will have you lie down on the table and will put either warm or cool water (or air) into your ear for approximately 60 seconds, during which you may experience a "revolving" or "floating" sensation. It  should not be painful in any way. This will be done a total of four times;  each ear with warm irrigation and each ear with cool irrigation with a brief recovery period between each irrigation.

At the completion of the VNG, the examiner will remove the goggles and will help you to sit up.  You should be feeling fine by the time you leave Sanford Neurodiagnostics.

Sanford Health in Bismarck is the only health care institution in Bismarck that performs VNG testing.

Please check in at registration on the main floor of Sanford Medical Center. Because paperwork may be involved in the registration process, please arrive 15 minutes before your appointment. If this appointment must be cancelled or changed, please call (701) 323-6050.

The electroencephalography exam

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Electroencephalography is a recording of the electrical activity of the brain. The recording of the activity is called an electroencephalogram.

The minute electrical events or waves continually produced by the brain are sensed, amplified and recorded by a computer. The electroencephalogram, the written record, is interpreted by a neurologist.

The procedure is designed to be painless. Small, cupped, silver discs are attached the scalp by paste or a cap. The entire examination takes approximately one hour for set-up, recording and clean-up.

There are no shocks or electrical impulses rather the EEG equipment receives and records the impulses that the brain produces. During the procedure one may be asked to breathe heavily for approximately three minutes. Later, a light is flashed for a brief period of time with the eyes closed. These two simple procedures cause changes in the brainwaves which can help the electroencephalographer to interpret the recording.

When used appropriately, the EEG may be a uniquely useful study. The results of the study will be forwarded to your physician who will be able to better discuss them with you in the full context of your total examination.

The evoked potential exam

click here for instructions to prepare this exam »

The evoked potential examination is a computer assisted recording of the electrical activity of the central nervous system following stimulation, such as sound, a light flash or an electrical pulse.

The evoked potential examination has a number of applications. Sound stimulation can determine hearing loss in infants or hearing nerve problems in adults. Light stimulation can identify problems of the retina, visual nerve or visual part of the brain. Electrical pulse stimulation delivered to the arms or legs can aid in identifying problems of the spinal cord or brain.

The procedure is designed to be painless. Small, cupped silver discs are attached to the skin of the scalp. The computer records information from your central nervous system in response to the stimulus.

During the procedure you will be placed in a soft reclining chair and asked to relax. Depending upon the type of procedure, the entire examination will take approximately 30 minutes to two hours, including set-up, recording and clean-up.

When used appropriately, the evoked potential examination may be a uniquely useful study. The results of the study will be forwarded to your physician, who will be able to better discuss them with you in the full context of your total examination.

Please check in at registration on the main floor of the hospital. Because paperwork may be involved in the registration process, please arrive 15 minutes before your appointment. If this appointment must be cancelled or changed, please call (701) 323-6050.

Doctors

Maximo Kiok, MD
Neurology
   
Stephanie Miller, MD
Neurology

Contact information

Sanford Neurodiagnostics
300 N. Seventh St.
Bismarck, ND 58501

(701) 323-6050

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