A method includes forming an incision in a body at a location apart from a mid-line axis defined by a portion of a spinal column including a first pair of adjacent spinous processes. A first support member is inserted percutaneously through the incision into a space between the first pair of adjacent spinous processes. A second support member is inserted percutaneously through the incision into a space between a second pair of adjacent spinous processes different from the first pair of adjacent spinous processes.