Pointing devices, such as the mouse and trackball, can cause computer-related
injuries to the shoulders, neck, elbows, wrists, and hands. Common actions
associated with such devices include reaching, gripping, pivoting at the
wrist, finger clicking, and holding the button when dragging
the mouse. Those actions and static arm posture (mouse arm)
may cause problems eventually.
THE CURSOR WITH A
When a pointing device is used while keying, it is important that it
is accessed without overreaching or using awkward postures. To accomplish
this place the pointing device as close to the keyboard as possible.
When the pointing device is in the right
8. The pointing device is
close to the keyboard.
|There are many improvement
options for positioning the pointing device that are not covered in
this section. Other comfortable positions for the pointing device
that promote a flat (neutral) wrist can be used.
When using a mouse, try this technique:*
Drop your arm and hand as one onto the mouse, with your
upper arm hanging freely from your shoulder.
Drape your hand over the mouse, with your palm on the center
of the mouse and all your fingertips hanging over the front and
sides (avoid the temptation to grip the mouse with your fingers).
Make small circular motions with the mouse by making arm
movements from the shoulder.
Click the mouse button with the mid-section of your finger
rather than your fingertip.
* Computing Without Pain With the MouseKeyDo System,
Norman J. Kahan, MD.
Tips for mouse or trackball:
Take your hand off the mouse or trackball when you are not using
it, and rest your hand in your lap.
Make sure you have enough space on the work surface to move the
cursor with the mouse in one sweeping movement, rather than having to
pick up and reposition the mouse.