Various approaches to detecting arousals from sleep involve generating signals modulated by muscle tone, brainwave activity, and/or other nervous system activity associated with a patient's autonomic arousal response. Generating the signals and/or detecting autonomic arousals from sleep may be performed...http://www.google.de/patents/US20050076908?utm_source=gb-gplus-sharePatent US20050076908 - Autonomic arousal detection system and method
