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Diagnosis of epilepsy: Invasive intraoperative diagnosis of epilepsy: Electrocorticography

You had surgery during which the brain waves in your brain’s cortex were measured.

The brain is located inside the head. It receives, processes and stores sensory impressions. The brain controls movements and various physical functions. The cortex is the outer layer of the brain.

Many of the brain’s processes involve mild electrical currents flowing to the nerve cells. Some of these currents can be measured. Measuring the brain waves in the cortex involves, first, opening up the cranial bone under anesthetic. A mesh with several sensors is then placed on the surface of the brain. Sensors may be small metal plates, for example.

The sensors are used to measure the brain waves in different areas of the brain. This enables the activity in specific parts of the brain’s cortex to be examined.

The brain waves are represented as lines or waves on a screen or on paper. When a seizure occurs, these lines or waves change. The measurements can also show where in the brain a seizure occurred.

Additional indicator

If necessary, additional letters are appended to OPS codes to indicate which side of the body is affected.

  • L: Left
  • R: Right
  • B: Both sides

Further information

Note

Your doctor will assist you with any health-related questions and explain the OPS code to you in a direct consultation if necessary.

Source

Provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).