Abstract: A wearable device is described that is configured to be positioned on or adjacent to a lower extremity of a person and to monitor a plurality of skin surface sites of the person. The wearable device may include a stimulus source having a surface area to provide stimulus, a blood volume sensor configured to sense a stroke event at the at least one of the plurality of skin surface sites, an electrode configured to obtain bioelectrical data, and at least one processor communicatively coupled to the wearable device and configured to: output a first activation signal to the stimulus source, output a second activation signal to the blood volume sensor, receive an output signal from the blood volume sensor, and determine a stroke event at the at least one of the plurality of skin surface sites based on the output signal.

Abstract: A safety apparatus for a rider motivated wheeled vehicle, the safety apparatus including a remote control module and a remotely actuable braking apparatus. The remote control module includes an electronic control signal activation module, a manual signal activator coupled for activating the electronic control signal activation module for generating a control signal, and a power supply coupled for powering the electronic control signal activation module. The remotely actuable braking apparatus includes an auxiliary brake device that is positionable for engaging at least one wheel of a rider motivated wheeled vehicle; an electronic actuator module coupled to the auxiliary brake device and being responsive to a received control signal for operating the auxiliary brake device, and a power supply coupled for powering the actuator module.