1. A system comprising: a therapy module configured to deliver therapy to a patient; a biosignal detection module configured to detect at least one biosignal from a brain of a patient that results from a volitional patient input; a processor configured to control the therapy module based on the detection of the at least one biosignal, wherein the processor is configured to control adjustment of a parameter of the therapy based on the detected biosignal; and an external programmer including a user interface and a telemetry module, wherein the external programmer is configured to: receive an activity selection via the user interface; receive an electrical signal from the biosignal detection module; and associate the electrical signal with the activity selection, wherein the biosignal is based on the electrical signal.