It is known that the major slowing of nerve conduction in the carpal tunnel syndrome occurs in the palm to wrist segment. A technique exploiting this fact and easily applicable in the routine laboratory would be useful in diagnosing early examples of the condition. To this end, orthodromic sensory potentials from stimulation of digits II and V, and of the palmar branches of the median and ulnar...

In the carpal tunnel syndrome median nerve motor conduction may be delayed below the wrist, while the motor nerve fibre conduction velocity above-the wrist may be relatively unaffected (Carpendale, 1956; Simpson, 1956). Median nerve sensory conduction may also be impaired below the wrist in the carpal tunnel syndrome (Gilliatt and Sears, 1958). No detailed study has been made comparing distal s...

BACKGROUND There is no clear-cut consensus on the best diagnostic criteria for carpal tunnel syndrome. The objective of this study was to compare the probability of carpal tunnel syndrome being present following electrodiagnostic testing with the probability of it being present after the diagnosis was established on the basis of a clinical evaluation alone. METHODS The study sample included p...

Carpal tunnel syndrome affects approximately 3 percent of adults in the United States. Pain and paresthesias in the distribution of the median nerve are the classic symptoms. While Tinel's sign and a positive Phalen's maneuver are classic clinical signs of the syndrome, hypalgesia and weak thumb abduction are more predictive of abnormal nerve conduction studies. Conservative treatment options i...

Bifid median nerve is an anatomic variation that may be associated with carpal tunnel syndrome. It is important for the surgeon to be aware of the existence of this condition preoperatively in order to plan the carpal tunnel release. We report the correlation between ultrasonographic findings and magnetic resonance imaging results in six patients with bifid median nerve, selected from a populat...

BACKGROUND Wrist anthropometrics and posture have been implicated in the development of carpal tunnel syndrome, yet it remains unclear how external measurements relate to carpal tunnel parameters in neutral and non-neutral postures. The purposes of this study were (i) to evaluate the effect of slice orientation on several indices of carpal tunnel size and shape and (ii) to examine the relations...

Purpose. The palmaris longus profundus has been documented throughout the literature as a cause of carpal tunnel syndrome. We present a case of palmaris profundus tendon removal during the revision of carpal tunnel release. Method. During a carpal tunnel release in a 66-year-old woman, palmaris profundus tendon was found inside the tunnel under the transverse carpal ligament, just above the med...

The etiology of carpal tunnel syndrome was studied by comparing the role of genetics, sleep position and sexual intercourse as possible causes of idiopathic carpal tunnel syndrome. The etiologic potential of the three theories was analyzed using a modified version of the Bradford Hill criteria of causation. All three theories scored equally well according to eight of the nine Bradford Hill crit...

The median artery is the main source of blood for the forearm in intrauterine life. During the process of development the median artery gets obliterated and supplies the median nerve. Variation of persistent median artery and its accompanying with the median nerve in the carpal tunnel is one of the important anatomic variations of the upper limb. Thrombosis of the artery inside the carpal tunne...

Background: Only a few studies have addressed seamen’s health although they have dangerous working conditions. We studied musculoskeletal diseases among fishermen and seafarers with focus on carpal tunnel syndrome and rotator cuff syndrome. Methods: Cohorts of all male Danish seafarers 1986-1998 and fishermen 1964-1998. We calculated standardised incidence ratios (SIR) and compared SIRs for two...