References. 1  Kellner C. Overview of electroconvulsive therapy (ECT) for adults. 2  Kellner C. Technique for performing electroconvulsive therapy (ECT) in adults. 3  AskMayoExpert. 4  ECT, TMS and other brain stimulation therapies. 5  Depression: How electroconvulsive therapy works. 6  Brain stimulation therapies. 7  Acharya D, et al.
Wilderness is the land that is-rare, wild places where one can retreat from civilization, reconnect with the Earth, and find healing, meaning and significance.
A frontier represents uncharted territory. It could be a remote piece of land or a new field of study, but if someone calls it the frontier, you are challenged to explore it. The noun frontier has several meanings. It can refer to the wilderness at the edge of a settled area (picture covered wagons pushing westward) or it can mean a field of study that has not yet been explored (picture genetically engineering pet dinosaurs).