Many operations have been described to restore active opposition of the thumb, but all are dependent on the transplant of tendons and their rerouting to fulfil their new function. When there is no motor available for transplant-quite a common problem-the accepted procedure is to unite the first metacarpal bone to the second in the position of opposition. In 193 1 von Baeyer described a method o...

According to the usual text-book descriptions the median nerve supplies the abductor polhicis, opponens pohlicis, flexor pollicis brevis and the two lateral lumbricals, while the ulnar nerve supplies all the other muscles in the hand (Gray 1946, Cunningham 1931, Wood Jones 1941). Several articles published since about 1890, notably in the French and the German literature, have mentioned variati...

BACKGROUND Bilateral changes in the hemispheric reorganisation have been observed chronically after unilateral stroke. Our hypotheses were that activity dependent competition between the lesioned and non-lesioned corticospinal systems would result in persisting asymmetry and be associated with poor recovery. METHODS Eleven subjects (medium 6.5 years after stroke) were compared to 9 age-matche...

The neuromuscular depolarizing block induced by intra-arterially injected ACh was studied to determine the variability in the same subject and in different subjects without disorders at the motor end-plate. Amplitude of action potentials of the opponens pollicis muscle evoked by intermittent repetitive supramaximal stimulation of the median nerve at the wrist were recorded for one hour from the...

This study investigated the psychophysiological patterns associated with cell phone text messaging (texting). Twelve college students who were very familiar with texting were monitored with surface electromyography (SEMG) from the shoulder (upper trapezius) and thumb (abductor pollicis brevis/opponens pollicis); blood volume pulse (BVP) from the middle finger, temperature from the index finger,...

To cite: Nijsse B, Roks G. BMJ Case Reports Published online: 28 November 2012 doi:10.1136/bcr-2012007347 DESCRIPTION A 73-year-old man presented with paresthesias of the fingertips and weakness of the abductor pollicis brevis muscle and the opponens pollicis muscle of both hands. Carpal tunnel syndrome (CTS) was suspected and confirmed by electromyography. The presence of swelling and pitting ...

BACKGROUND It is unclear whether mental simulation without actual muscle contraction associated with actual motion can increase the excitability of the spinal neural function. OBJECTIVE To determine the best method for mental simulation without actual muscle contraction, we analyzed the F-wave of thenar muscles after stimulating the median nerve by motor imagery whilst holding the sensor of a...

This study was performed to investigate the variations, dimensions and attachment of the abductor pollicis longus (APL) tendon. Fifty upper limbs of adult cadavers were dissected in the Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia. Variations of APL tendon and its way of insertion were observed;its length, width and thickness were also measured and statistically analysed...