"This is the only mouse that relaxes all 8 muscle groups that cause Carpal Tunnel Syndrome and other overuse injuries" - Dr. Michael Leahy, designer of the Zero Tension Mouse
| The revolutionary Zero Tension Mouse allows all of the muscles
of the hand, arm and shoulder to relax more effectively than with any other
device in the world. In fact, no other mouse comes close. Developed by a
true pioneer in the area of overuse injuries, Dr. Michael Leahy designed
the Zero Tension Mouse to reduce the likelihood of developing repetitive
strain injuries.Whether you are working on the computer all day, gaming,
or just surfing the net, the Zero Tension Mouse will allow you to do it
with greater comfort and ease.
Biomechanics, Zero Tension Mouse, and Cumulative Injury.
A few years ago Dr. Michael Leahy defined the cumulative injury cycle and explained why soft tissues like nerves and muscles became injured with repetitive motion. Until this time the standard treatments were ultrasound, electrical stimulation, massage and nerve and muscle stretching. In general the problem was not resolved.
Then came Active Release Techniques and all of a sudden surgeries were no longer needed and in general the problems were fixed in short order. Dr. Leahy then worked on how to prevent repetitive motion injuries from happening. He formulated the law of repetitive motion and defined the four factors involved in these injuries. The one factor that could be minimized was tension on the tissues or 'relaxation'of the muscles. If the muscles could be relaxed during the activity but still maintain function then the problem could be avoided and the employer would still be happy with production.
With the Zero Tension Mouse all of the muscles of the hand, arm and shoulder/neck can relax and do so more effectively than with any other device in the world. In fact, nothing else comes close.
Let's start with the hand. When the hand is completely relaxed the fingers flex and the hand is half way between a fist and completely straight. This balances the tension between the flexors and extensors of the fingers. When the flexors are tight they can trap the median nerve and cause what is commonly but erroneously called "carpal tunnel syndrome". When the extensors are too tight they can cause epicondylitis or "tennis elbow". They can even trap the radial nerve and cause numbness in the hand. In order to prevent this the hand must be positioned so that it is not too straight and not closed too tight.
Want to see the Mouse in Action?
System Requirements for the Zero Tension Mouse
On a PC, one of the following operating systems:
An available Universal Serial Bus (USB) 1.1 port (USB requires Windows 98, Windows Millennium Edition, Windows 2000, or Windows XP)
NOTE: This mouse will not work with Windows 95 or Windows NT
For a Macintosh, one of the following operating systems:
An available Universal Serial Bus (USB) port
Dimensions:Height: 4.5 inches (11.4 cm)
Width: 3.4 inches (8.6 cm)
Depth: 5.6 inches (14.2 cm)
The mouse currently comes in small, medium and large sizes.
The medium fits most small to medium size hands.
Which size is right for me?Please review the image at right. If your hand is longer than 7.5", then you should get the Large model of the mouse. If your hand is shorter than 7.5", then you should get the Medium model of the mouse.
Micwil Computer Consulting
Ergonomics Portal: ErgoCanada.com
P.O. Box 9022 Saskatoon, SK, Canada S7K 7E7
Phone: (306) 222-3203 Fax: (306) 382-4995
Toll-Free: (866) 335-3746 (ERGO)
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All materials copyright © 2006 Micwil Computer Consulting.