What Causes Carpal Tunnel?

A common factor in developing carpal tunneland carpal tunnel complaints.
symptoms is increased hand use or activity.Hyperthyroidism, osteoarthritis and diabetes were
While repetitive activities are often blamed, themost often associated with Carpal Tunnel
correlation is often unclear. Physiology and familysymptoms, as were variables such as age,
history may have a significant role in individual'sobesity and wrist dimension. In a studies by SG
susceptibility.Atcheson, only 35 of 297 subjects were aware
Many cases of carpal tunnel syndrome areof the underlying health condition which could
provoked by repetitive grasping and manipulatingaccount for their symptoms. Hence, these causes
activities. The exposure can be cumulative.would be missed by doctors if they were relying
Activities may be work-related or related to otheron a patient's health history to rule out other
activities (i.e. home improvement chores.)causative factors. It is important that a doctor
Symptoms are commonly exacerbated byrule out other causes as well. If a patient does
forceful and repetitive use of the hand and wristsnot have Carpal Tunnel, corrective surgery is
in industrial occupations, including jack hammerdestined to fail.
operators, meat packers, computer users andIt's not all in your head. Studies have also related
musicians. The condition has been documented forthis syndrome and other upper extremity
decades, but in recent 10 to 20 years hascomplaints with psychological and social factors. A
become more prevalent, probably due to betterlarge amount of psychological distress showed
public awareness and earlier diagnosis.doubled risk of the report pain, while job
There are a number of causes of carpal tunneldemands, poor support from colleagues, and work
syndrome. They can be either traumatic, ordissatisfaction also showed an increase in the
non-traumatic.report of pain, even after short term exposure.
Work related exposure is a common contributor.On the other hand, in 1997, studies done by the
In the U.S., for instance, carpal tunnel syndrome isNational Institute for Occupational Safety and
the biggest single contributing factor to lost timeHealth (NIOSH), indicated that job tasks involving
at work. This syndrome results in billions of dollarshighly repetitive manual acts or necessitating wrist
of workers compensation claims every year.bending or other stressful wrist postures were
However, recent studies and peer review articlesconnected. However, it appears that the 30+
have found no relationship between carpal tunnelstudies reviewed were concerned with the
syndrome and office-type work. Specifically,occupations of assembly line workers, meat
research studies have found no statisticallypackers, food processors, and the like, not
significant association between Carpal Tunnel andgeneral office work.
keyboard use. The jury is still out on what, if any,The medical and scientific studies are consistent in
relationship may exist between this condition andfinding no statistically significant relationship
light office work or computer use.between upper extremity repetitive trauma
Recently the Harvard Medical School published aclaims and the workplace.
report in which it addressed carpal tunnelIn summary, the underlying cause of carpal tunnel
syndrome. The Harvard report cited to the 2003syndrome is still in question . People that develop
Journal of American Medical Association study andsymptoms will frequently blame this on their work
the 2001 study in Neurology that computer useexposure, even though this exposure may indeed
did not increase a person's risk of development.have little to do with the root cause of this
Several studies have indicated a strong correlationsyndrome.
between an employees general physical condition