Mouse

Proper positioning of the mouse is critical since computer work so often involves frequent mouse movement. Try alternating the mouse from your right to left side in order to share the load bilaterally. Remember to take your hand off the mouse when waiting for your computer to respond to avoid static posture. See below for more tips on mouse positioning.

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Ideal Mouse Positioning

mouse-ideal

Ideal Mouse Positioning:

  • Mouse just below elbow level
  • Should be able to reach mouse with elbows at ~900
  • Ideal if forearms can be supported on armrest, desktop or forearm support while using the mouse
  • Take hand off mouse when waiting for computer to respond
  • Rest palm lightly on mouse (avoid death grip on mouse)
  • Alternate mouse on left & right side
  • Use keyboard short cuts: PC, MAC

Mouse Too High

mouse-too-high

The rotating picture above illustrates the differences with the mouse too high as compared to one that is at the correct height.

Risks:

  • Extended reach for mouse results in increased strain on the upper extremities, i.e. sore neck, shoulders, or forearm
  • Mouse above elbow level promotes wrist contact pressure and wrist extension: risk factors for carpal tunnel syndrome or sore wrist/hand

Fix It:

  • Raise chair & use footrest if needed, or
  • Obtain keyboard tray with room for mouse; position keyboard tray slightly below elbow level

Mouse Too Low/Armrests Too High

mouse-too-low

The rotating picture above illustrates the differences with the mouse too low as compared to one that is at the correct height.

Risks:

  • Results in awkward posture and contact stress to reach mouse
  • Promotes wrist extension

Fix It:

  • Raise mouse: position mouse just below elbow level & level with armrests. If your mouse sits on a drop down mouse platform try putting a book under it to raise it to just below elbow level, or
  • Lower armrests so they support the forearm, with the elbows at 90 degrees, and approximately level with the mouse, or
  • Remove armrests if they cannot be lowered to the correct height

Mouse Too Far to the Side

mouse-side

The rotating picture above illustrates the differences with the mouse too far away as compared to one with the mouse positioned close.

Risks:

  • Results in awkward posture (shoulder external rotation or abduction)

Fix It:

  • Mouse on the left; or
  • If your keyboard tray has the capacity, position the mouse platform over the number pad; or
  • Consider using a keyboard without a number pad as this allows you to keep your arm closer to your body while using the mouse

How to Adjust:

Video Example of how to adjust keyboard tray

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