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Nerve conduction, 1-2 studies

Testing of autonomic (sympathetic) nervous system function, heart rate response to breathing exercises, and passive tilt

Testing of autonomic (sympathetic and parasympathetic) nervous system function, at least 5 minutes of tilt

Placement of skin electrodes and measurement of stimulated sites in arms

Placement of skin electrodes and measurement of stimulated sites in legs

Placement of skin electrodes and measurement of stimulated sites in trunk or head

Measurement of nerve conduction patterns of eye blink reflex

Placement of skin electrodes and measurement of stimulated sites on arms and legs

Placement of skin electrodes and measurement of central motor stimulation in arms and legs

Continuous monitoring of nervous system during operation, each 15 minutes