Mouse Arm Disease (M.A.D.)
- Mouse Arm Disease (M.A.D.) is the name Sweden gives to the many problems mice create
- Muscles work mechanically. Any muscle that is tense is doing work
- Holding your hand Palm Down is work even if you are not moving your mouse
- Tired or Injured Muscles slow down blood flow, oxygen levels fall, producing toxins
- Grip overuses flexor (hand closing) muscles, under using extensor (opening) muscles.
- The imbalance this creates can cause pain when away from the computer
- Causes clenching and lowers circulation, puts pressure on tendons and nerves
- Palm down, the weight of your own hand and forearm bears down on your Carpal Tunnel
- Pressure on veins reduces blood flow returning to the heart
- Wrist rests press even deeper into the wrist making things worse
- Increases pressure in the Carpal Tunnel (American Academy of Orthopaedic Surgeons
- It is called Carpal Tunnel Syndrome!
- If you apply an ounce of grip for a second and for 3 hours a day, that is 750 tons of grip a year
- Clicking 10,000 times a day (easily done) is over 2,000,000 finger movements a year
- American Journal of Industrial Medicine Volume 41, Issue 4, 2002. 15 Mar 2002
- Studied 632 new hires using computers 15 hours or more a week
- Participants kept diaries and were followed for up to 3 years, which showed:
- Musculoskeletal Symptoms (they hurt but don't see a doctor)
- Neck & Shoulder 58 cases per 100 person-years
- In an office of 10 that's 6 cases a year
- Hand & Arm; 4 cases a year in an office of 10
- Musculoskeletal Disorders (saw a doctor)
- Neck & Shoulder; 3.5 cases a year in an office of 10
- Hand & Arm; 2 cases a year in an office of 10
- Problems are common among computer users
- More than 50% of users reported symptoms in the first year!
- Keyboard or Mouse?
- Most users develop dominant side, mousing hand problems
- Users changing hands develop problems in the other hand
- Left-handed, who mouse with the right, primarily get right side problems
- Are you likely to get M.A.D.?
- These statistics would suggest yes.
- Can we help?
For a more in depth Understanding of Getting M.A.D., click here.