A hand control device for controlling a peripheral system is disclosed. The hand control device can include a handle configured to be grasped by a user. The handle can comprise a body portion to be supported against a palm of the user. The hand control device can also include a finger control supported about the handle and comprising a rotatable joint to facilitate control based on flexion/extension of an index finger of the user. In addition, the hand control device can include a thumb control supported about the handle and comprising first and second rotatable joints to facilitate control based on flexion/extension and abduction/adduction of a thumb of the user.

A trailer brake controller for a motor vehicle may include a control unit configured to be mounted behind a spoke of a steering wheel of the vehicle, and a brake lever coupled to the control unit and extending along the control unit such that, when the control unit is mounted behind the spoke of the steering wheel, the brake lever extends above and/or below the spoke in a direction substantially perpendicular to the spoke. The brake lever may be configured to transmit a force applied to the lever by the driver to the control unit. The control unit may be configured to generate a manual trailer brake control signal based on the force applied to the lever.

A steering mechanism for a medical device that is configured for passing through the body cavities of a patient and for passage through an endoscope working channel is described. The mechanism comprises at least one spool having a central hole through which a central axle passes, the spool being rotatable about the axle, and the spool having at least one retaining tube having a lumen therethrough and configured to contain a portion of a drive cable. The drive cables, which may include UHMWPE, are capable of and are effective for deflecting the distal end of a catheter or endoscopic device, while preferably each being at least partially disposed through a retaining tube that is effective to prevent tangling or other binding of the cable(s).