What causes carpal tunnel syndrome?

What causes carpal tunnel syndrome?

What causes carpal tunnel syndrome?

Do you think you are suffering from carpal tunnel syndrome?

a. This disease affects not only healthy people but also people with risk factors that predispose them to carpal tunnel syndrome such as:

  • diabetes
  • smoking
  • pregnancy
  • osteoarthritis
  • hypothyroidism
  • excess weight
  • menopause
  • wrist fracture

b. Occupational factors such as the repetition of certain strong gripping movements or flexing and extension of the wrist or exposure to vibrating tools are sometimes mentioned as risk factors.

c. Most often, no predisposing factor is found. This is called idiopathic carpal tunnel syndrome.

d. The carpal tunnel is an anatomical zone of the wrist that is located at the junction between the hand and the forearm. It contains the nine flexor tendons that serve to bend the fingers of the hand and an important nerve, which runs through the extent of the canal, called the median nerve. This important nerve gives sensitivity (the sense of touch or tact) to the thumb, forefinger, middle finger and half of the ring finger. The small finger is usually spared in carpal tunnel syndrome because it is not innervated by the median nerve but by the ulnar nerve. Numbness of the little finger (fifth finger or little finger) therefore suggests another disease. The median nerve also stimulates and innervates the muscles at the base of the thumb in the palm of the hand.

e. The floor of the canal is formed by the bones of the wrist and its roof by a very solid and thick ligament called the transverse ligament or the annular ligament of the wrist. In some situations, and often because of the swelling and inflammation that may occur in the tendons, the pressure in the canal, and therefore the median nerve, increases. This increase in intra-ductal pressure compromises blood circulation and oxygenation of the nerve cells that make up the nerve. These nerve fibers can no longer function normally and conduction velocity of the electrical signals in the nerve slows down, causing numbness. In advanced cases, nerve conduction stops completely (nerve conduction block). Nerve fibers and their cells, called the axons, can then be irretrievably damaged. This results in a loss of perception of touch or tact in the thumb, index, middle and ring finger that compromises the function of the hand. The hand becomes awkward. Muscular atrophy may also occur due to the weakening of the muscles innervated by the median nerve. These consequences can become irreversible without prompt treatment. This is the danger of neglecting this pathology or of waiting too long before acting.

Do you think you are suffering from carpal tunnel syndrome?

Take our diagnostic test

Answer all the questions and you will receive our free ebook : Self Help Book for Carpal Tunnel Syndrome!

1. Does your work or personal occupation cause you to perform repetitive manual actions? ( Question 1 / 15 )

2. Do you suffer from numbness or frequent tingling sensations in the palm of your hand or in your fingers (especially thumb, forefinger and middle finger)? ( Question 2 / 15 )
3. Do you feel tingling and numbness especially in your thumb, forefinger, middle finger and fourth finger rather than your little finger? ( Question 3 / 15 )
4. Do you feel numbness or tingling in your fingers when you read a newspaper, drive a car or talk on the phone? ( Question 4 / 15
5. Do you feel numbness in your hand or hands when you raise them above your head? ( Question 5 / 15 )
6. Do you often feel a burning sensation in the palm of your hand or at your fingers? ( Question 6 / 15 )
7. Do you need to shake your hand or hands to try to relieve numbness? ( Question 7 / 15 )
8. Do your fingers seem swollen or clumsy, even if the swelling is not obvious? ( Question 8 / 15 )
9. Do the symptoms seem greater at night or on waking? ( Question 9 / 15 )
10. Have you ever awakened at night feeling the need to shake your hand to alleviate the symptoms? ( Question 10 / 15 )
11. Does splinting at night alleviate symptoms? ( Question 11 / 15 )
12. Do you feel weakness in your hand or wrist? ( Question 12 / 15 )
13. Have you noticed any discomfort or awkwardness when holding objects in your hand or trying to perform certain motions? ( Question 13 / 15 )
14. Do you have difficulty buttoning your clothes or handling small objects? ( Question 14 / 15 )
15. Do you have symptoms in both hands? ( Question 15 / 15 )