Vibrating glove device could help people with nerve damage

It could be used to assist individuals whose jobs require high-precision manual dexterity, or those with medical conditions that reduce their sense of touch, according to the engineers behind the prototype at the Georgia Institute of Technology.

The fingertips of the glove contain a layer of piezoelectric material that generates an electrical charge when a mechanical force is applied to it. This powers an actuator made of a stack of lead zirconate titanate layers to generate high-frequency vibrations. The actuator is attached to the side of the fingertip, so that the palm-side of the finger remains free and the individual wearing the glove can continue to manipulate objects.

Research has shown that applying a small vibration to the side of the fingertip improves tactile sensitivity and motor performance.

In the latest set of experiments, the researchers attached the device to 10 healthy adult volunteers who then performed common sensory and motor-skill tasks, including texture discrimination, two-point discrimination, single-point touch and grasp tests. The experimental results showed that the volunteers performed statistically better on all of the tasks when mechanical vibration was applied.