Improved technology and higher fidelity are making medical simulations increasingly popular. A simulated peripheral nerve stimulator and thumb actuator has been developed for use with the SimMan Universal Patient Simulator. This device incorporates a handheld control box, a McKibben pneumatic muscle and articulated thumb, and a remote software interface for the simulation facilitator. The system simulates the action of a peripheral nerve stimulator on the ulnar nerve, and the effects of neuromuscular junction blocking agents on the thumb motion.