Guyon’s canal is formed by the transverse carpal ligament, the carpal ligaments
and the opponens pollicis muscle of the 5th finger, with the volar carpal ligament
and the palmar brevis muscle forming its roof. The ulnar nerve, which divides
at this point into its superficial and deep branches, can become trapped or
compressed as it passes through the canal, resulting in a neurological syndrome
affecting the sensitivity of the 5th finger and part of the 4th, as well as the motor
function of the hand muscles, leading to problems in bringing the fingers together
and separating them.
Symptoms
Atrophy of the hypothenar eminence and the interosseous muscles with weakness
in closure movements and/or ulnar flexion of the wrist. Paresis, hypoesthesia
and paresthesia in the area innervated by the ulnar affecting the flexors of the
4th and 5th fingers and the intrinsic musculature.
Orthotic Treatment
In the case of Guyon’s syndrome, are very useful for keeping
the joints at rest during day and nighttime use, and preventing postural attitudes
during sleep like those in which the wrists are in flexion.Orthopedic treatment, including the use of moist warm compresses, paraffin
and other techniques such as laser or electrotherapy, as well as preventative
treatments like wrist mobility exercises during rest periods, in conjunction with
the use of unloading splints that enable immobilisation of the wrist, hand and
finger joints.
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