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Physiological function tests: Multiple sleep latency test (MSLT)/multiple maintenance of wakefulness test (MWT)

Your sleeping behavior has been tested.

Sleep involves a certain sequence and it is governed by various factors. There are deep sleep phases and lighter sleep phases. These phases alternate during sleep.

You have been tested to see how quickly, and whether, you fall asleep. Equipment is used to take various measurements during the test. The heartbeat and the movements of your body are measured, for example.

These tests often measure brainwaves and eye movements, too. Brainwaves are electrical signals in the brain. These electrical signals send information in the brain. Eye movements also generate certain electrical signals. To measure these electrical signals a lot of small sensors are attached to the person’s head. The brainwaves and eye movements that are measured can then indicate the different sleep phases.

A video recording was made of you while you were sleeping. In this way, when there are certain changes to the measurement readings, for example, we can see how you were lying or whether you were moving at that particular moment.

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).