Electroencephalography (EEG): Measures the electrical activity in the cerebral cortex, providing important information about the various areas of cortical brain function. The EEG is a crucial tool in the diagnosing, treatment and monitoring of a variety of disorders such as epilepsy, movement disorders and other neurodegenerative diseases. Michigan Neurology Institute provide ambulatory EEG as well as video EEG monitoring for the most challenging cases. This enables us to correlate clinical symptoms with electrophysiologic fi ndings. The ambulatory EEG allows patients to remain at home and continue to be monitored for up to 72 hours. State-of-theart digital technology and a spike and seizure software detection program ensure the highest quality and most accurate results.
Visual Evoked Potential (VEP)
Visual Evoked Potential (VEP): An evoked electrophysiologic potential is extracted from the electroencephalographic activity recorded by electrodes at the scalp surface. This test evaluates the function of the visual pathway from the retina to the brain’s occipital cortex. It is most useful in assessing diseases such as multiple sclerosis and optic neuritis.
Autonomic Nervous System Testing (ANST)
Autonomic Nervous System Testing (ANST): Michigan Neurology Institutes tests of the autonomic nervous system include sudomotorsympathetic skin potential testing and best beat R-R valsalva testing. These autonomic tests measure how the various systems in the body controlled by the autonomic nerves respond to stimulation. The tests monitor blood pressure, blood fl ow, heart rate, skin temperature, and sweating; measures of these functions help determine whether the autonomic nervous system is functioning normally or whether damage to the autonomic nervous system has occured. It is useful in assessing various dysautonomias such as orthostatic hypotention seen in Shy-Drager syndrome.
Electromyography & Nerve Conduction Study (EMG/NCV)
Electromyography and Nerve Conduction Velocity Study (EMG/NCV): An EMG study measures the electrical activity of muscles at rest and during contraction. A NCV study measures the velocity of electrical signals along a nerve. Measuring the electrical activity in muscles and nerves can help in the diagnosing of disorders including muscular dystrophy, myopathies, peripheral neuropathies, radiculopathies and more.
Somatosensory Evoked Potential (SSEP)
Somatosensory Evoked Potential (SSEP): Studies the relay of body sensations to the brain and how the brain receives those sensations. An electrode placed on the arm or leg generates an electrical signal, while recording electrodes are placed on the head and/or spine. The test assesses how the spinal cord and brain transmit information about body sensations through the peripheral nerves. It can localize a “signal blockage” either in the relay system or in the interpretive center, useful in diagnosing multiple sclerosis, radiculopathies and other diseases.
Brainstem Auditory Evoked Responses (BAER)
Brain Stem Auditory Evoked Responses (BAER): Tests both the ear and the brain by measuring the timing of electrical waved from the brainstem to an auditory stimulus. Delay of one side relative to the other suggests a lesion in the ear or the brainstem itself and are commonly abnormal in such disorders as acoustic neuroma, multiple sclerosis, brainstem stroke, or brainstem degenerative disorders.