A system configured for identifying the presence of functional sympathetic and parasympathetic nerves innervating a selected area on an arterial wall of a renal artery based on changes in physiological parameters induced by a dose of energy, wherein the system is configured for executing: - one or more of the steps of preparing a baseline of the physiological parameters to be measured prior to the delivery of a dose of energy to the arterial wall; - delivering a dose of energy to the arterial wall; - detecting the physiological changes as a result of a dose of energy being delivered to the arterial wall; - rating the change based on a set of empirically pre-determined values; and, - based on the ratings, determining if there are functional sympathetic or parasympathetic nerves in the vicinity of the site of energy delivery; wherein the system comprises: - a sensor, - a device configured for continuously recording physiological signals from sensor and produce a reliable baseline reflective of any instantaneous changes in the signals; - an energy delivery device provided with electrodes and configured for energy delivery by one of the electrodes present in the energy delivery device to the area on the arterial wall that this electrode is in contact with; wherein the sensor is configured to detect any physiological change caused by the energy delivered, the change being recorded as signals which are then sent to the device, and wherein the device is configured for identifying the presence of functional sympathetic and parasympathetic nerves by - determining the deviation of the physiological signals from the baseline and - determining the type of nerves innervating the area on the arterial wall based on the deviation from the baseline. - one or more of the steps of preparing a baseline of the physiological parameters to be measured prior to the delivery of a dose of energy to the arterial wall; - delivering a dose of energy to the arterial wall; - detecting the physiological changes as a result of a dose of energy being delivered to the arterial wall; - rating the change based on a set of empirically pre-determined values; and, - based on the ratings, determining if there are functional sympathetic or parasympathetic nerves in the vicinity of the site of energy delivery; wherein the system comprises: - a sensor, - a device configured for continuously recording physiological signals from sensor and produce a reliable baseline reflective of any instantaneous changes in the signals; - an energy delivery device provided with electrodes and configured for energy delivery by one of the electrodes present in the energy delivery device to the area on the arterial wall that this electrode is in contact with; - a sensor, - a device configured for continuously recording physiological signals from sensor and produce a reliable baseline reflective of any instantaneous changes in the signals; - an energy delivery device provided with electrodes and configured for energy delivery by one of the electrodes present in the energy delivery device to the area on the arterial wall that this electrode is in contact with; wherein the sensor is configured to detect any physiological change caused by the energy delivered, the change being recorded as signals which are then sent to the device, and wherein the device is configured for identifying the presence of functional sympathetic and parasympathetic nerves by - determining the deviation of the physiological signals from the baseline and - determining the type of nerves innervating the area on the arterial wall based on the deviation from the baseline. - determining the deviation of the physiological signals from the baseline and - determining the type of nerves innervating the area on the arterial wall based on the deviation from the baseline.