Neurophysiology Laboratory

Part of Cedars-Sinai's Neurology Department, the Neurophysiology Laboratory offers sophisticated diagnostic procedures to help neurologists identify neurological conditions and develop treatment plans. Available tests include:

  • Electroencephalograms (EEG), which measure the electrical activity of the brain
  • Auditory evoked potential tests, which detect the rate of conduction between the ear and the brain
  • Nerve conduction studies, which test electrical activity in nerves
  • Electromyograms (EMG), which measure electrical activity in the muscles
  • Visual evoked potential tests, which measure the rate of conduction between the retina and the brain
  • Somatosensory evoked potential tests, which measure conduction of certain nerve pathways between the peripheral nerves through the spinal cord to the brain
  • ICU monitoring - determining the depth of coma in patients with brain injury receiving protective treatment with barbiturates to reduce brain metabolism and intracranial pressure
  • Long-term video-EEG monitoring - monitoring of patients with seizures and conditions mimicking seizures with video recordings to determine whether patients have seizures and localizing seizures in candidates for epilepsy surgery
  • Neurophysiological monitoring for invasive neuroradiology - some aneurysms are treated through coils without brain surgery, and monitoring is necessary to determine whether the treatment may cause brain damage
  • Angio-WADA-neurophysiological monitoring to determine which side of the brain is dominant and whether memory function will be affected by certain types of surgery.

Intraoperative Monitoring

The Neurophysiology Laboratory also provides monitoring of brain function during surgery. Our specialists continually monitor many spinal and brain surgeries in real time in order to alert the surgeon of potential damage to the nervous system. Our team consists of neurophysiology physicians and technologists with special training and expertise in monitoring.

  • Language mapping - an intraoperative procedure in which the brain is directly stimulated to identify regions that are important for language. This helps the surgeon preserve language regions.
  • Motor strip mapping - an intraoperative procedure that helps the surgeon identify the regions of the brain responsible for motor control

For an appointment, a second opinion or more information, please call 1-800-CEDARS-1 (1-800-233-2771) or email us at

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