 Bromm et al. thus established the intracutaneous pain model in the Department of Neurophysiology at the University-Hospital Hamburg-Eppendorf more than 20 years ago. This model involves removing a small core of epidermis from the skin on the pulp of the finger and placing an electrode directly in the vicinity of Aδ- and C-fiber terminals. Corresponding stimulation evokes clear pinprick pain of the patients. Utilizing Bromm et al.s methodology, we actively contribute to the ongoing debate on the clinical use of analgesia-monitors in tracing unconscious sensation of pain during general anesthesia. For better comparability to previous studies the Bromm et als methodology will be complemented by a measurement after a tetanic stimulation on each analgesic level. 