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Biomedical subjects

P E Wongsam

Publications and source records attributed to P E Wongsam.

5 recordsLinked to original sources
PubMed1986

Flexibility and velocity of the normal and impaired lumbar spine.

Trunk mobility, as defined by trunk angle, has long been considered an acceptable means to evaluate the degree of impairment in patients with low back pain (LBP). However, biomechanically, there is reason to believe that patients with LBP may exhibit significant sensitivity to trunk velocity of motion as well as angular mobility factors. An experiment was performed to study the trunk action of patients with LBP and of a normal control group. A lumbar monitor was used to monitor both trunk angle range and trunk velocity. The results indicate significant differences between the two groups for both angle and velocity measures. However, the velocity measure revealed more dramatic difference between groups and was the only parameter that was capable of distinguishing between the particular experimental tasks for both LBP and normal groups. Thus, it is suggested that trunk velocity be used as a quantitative measure of low back disorder and that it be used as a means to monitor the rehabilitative progress of patients with LBP.

Adult↗
PubMed1983

Carpal tunnel syndrome: use of palmar stimulation of sensory fibers.

In early or mild carpal tunnel syndrome (CTS), where the segment of median nerve sensory fibers is neurapraxic, stimulation of the nerve distal to the carpal ligament elicits a normal response in comparison to the segment of nerve across the carpal tunnel. In 100 hands of 50 normal adults, palmar stimulation of the median sensory fibers at 7 cm was compared to that at the wrist (14cm). Mean values for latency, amplitude, and duration were obtained, and palm/wrist ratios were calculated. Fifteen patients with CTS and 6 with underlying peripheral neuropathy were studied. This technique is useful for diagnosing early CTS and also for identifying an underlying mild peripheral neuropathy, eg, in diabetes mellitus.

Adult↗
PubMed1981

Sensory latencies to the ring finger: normal values and relation to carpal tunnel syndrome.

Sensory innervation to the ring finger (digit IV) is generally shared by the digital branches of the median and ulnar nerves. In 74 hand studies on 37 normal adults, all had a recordable response in digit IV upon stimulation of the median and ulnar nerves antidromically 14cm proximally to the recording electrodes. Comparing the median sensory latency to digit IV with the ulnar sensory latency to the same digit, the difference was 0.3msec or less in 93% of the hands. In 18 cases of carpal tunnel syndrome, the difference ranged from 1 to 2.1msec. This procedure may be of value as an easily performed and rapid technique to screen vulnerable nerve syndromes for possible entrapment and to provide baseline data for asymptomatic hands in individuals with carpal tunnel syndrome.

Action Potentials↗