No abstract available.
Median Nerve*

No Abstract Available.
Median Nerve* ; Neurilemmoma*

No abstract available.
Arteriovenous Malformations* ; Axilla* ; Median Nerve*

OBJECTIVE: Nerve conduction study of palmar cutaneous branch of median nerve is infrequently evaluated in spite of its importance because of perceived technical difficulties. This study reports the different nerve conduction responses of palmar cutaneous branch of median nerve by change of stimulation site. METHOD: Conduction study of palmar cutaneous branch of median nerve was performed in 42 normal individuals stimulated at the site of 7 cm proximal to the recording electrode. Results were compared to those of stimulated at the site of 10 cm proximal to the recording electrode with t-test by SPSS 7.5. RESULTS: Values of conduction study stimulated at the site of 10 cm proximal to the recording electrode were 2.37+/-0.48 msec (mean+/-SD) for peak latency, 15.67+/-8.31 micro V for amplitude and 34.52+/-5.97 mA for supramaximal intensity.Those values stimulated at 7 cm proximal were 1.72+/-0.33 msec for peak latency, 24.48+/-11.41 micro V for amplitude and 12.82+/-2.18 mA for supramaximal intensity. Amplitude stimulated at the site of 7 cm was significantly larger than that stimulated at the site of 10 cm (p<0.01). Supramaximal intensity stimulated at the site of 7 cm was significantly smaller than that stimulated at 10 cm (p<0.01). CONCLUSION: The different stimulation site influences on the nerve conduction study of the palmar cutaneous branch of median nerve. Conduction study of palmar cutaneous branch of median nerve with stimulation at 7 cm proximal is a more reliable and convenient method compared to 10cm proximal in respect of larger amplitude and smaller supramaximal intensity.
Electrodes ; Median Nerve* ; Neural Conduction

Although electrodiagnostic sympathetic skin response (SSR) has been widely assessed the detail procedure, such as filter setting and stimulus intensity, has not been standardized yet. This study was performed to establish optimal settings for SSR recording. In 18 healthy subjects, SSRs were recorded in the left hand while stimulating the right median nerve. The data were analyzed for frequency and amplitude domains and statistically evaluated using the methods of analysis of variance (ANOVA) and regression analysis. The peak frequency of SSR signal was 18.59?8.26 Hz, and the frequency of major signals ranged from 0.5 to 2 Hz. The amplitude of SSR was linearly regressed on the intensity of electical stimulus according to the equation: y=2.60x+277.89 (p<0.05). The latency of SSR was linearly decreased with the intensity of electrical stimulus with the relationship: y=1445.46+/-1.60x (p<0.05). On the bases of these results, we conclude that a proper filter setting for SSR measurement would be 1-100 Hz, and at stimulus intensity below 128 mV, the higher the stimulus intensity, the amplitude was bigger and the latency was shorter.
Hand ; Humans* ; Median Nerve ; Skin*

Fibrolipomatous harmatomas are rare, benign, fibrolipomatous process of peripheral nerves. It usually manifests as a soft slowly growing mass consisting of proliferating fibrofatty tissue surrounding and infiltrating major nerves and their branches. The median nerve is affected in the great majority of cases. Intradural spinal cases are extremely rare. The authors present a very rare case of a fibrolipomatous harmatoma involving the intradural space of lumbar spine with review of pertinent literature.
Hamartoma* ; Median Nerve ; Peripheral Nerves ; Spine

The Gantzer's muscle (GM) is an additional muscle in the forearm as the accessory head of the flexor pollicis longus (FPL) and accessory head of the flexor digitorum profundus (FDP). We reported a rare case of double GM formed by four muscle bellies. From the dorsal part of flexor digitorum superficialis, small four bellies formed two muscles merging to FDP and FPL, as GMs. These accessory heads of FDP and FPL crossed the ulnar artery and the median nerve, respectively. These additional muscles in the forearm flexor compartment are rare and its clinical and embryological significances should be considered.
Forearm ; Head ; Median Nerve ; Muscles* ; Ulnar Artery

Somatosensory evoked potentials(SEPs) has been an important part of electrodiagnosis and has been utilized as a clinical diagnostic technique in various neurological disease. The purpose of this study was to evaluate the utility of SEPs in the analysis of sensory deficit as an objective method. The test was performed on the two groups of patients with cerebrovascular disease associated with motor and sensory impairment (grouip A) and pure motor impairment (group B), and then the results are compared with that of normal age-matched group. The results are as follows: 1. There is no significant difference in the abnormalities of N9 and N14 component between group A and B (P>0.05). 2. There is no significant difference in the decreased amplitude of N20 component (P>0.05), but there is a significant difference in the delayed peak latency or absent wave of N20 component(P<0.01) between group A and B. 3. There is a significant difference in the increased central conduction time between group A and B (P<0.01). 4. Although the difference is not significant statistically, there are more abnormalities of N20 or central conduction time in the intact hemispheres in group A than group B after stimulation of the median nerves of the affected sides.
Electrodiagnosis ; Evoked Potentials, Somatosensory* ; Humans ; Median Nerve

No abstract available.
Carpal Tunnel Syndrome* ; Cicatrix* ; Median Nerve*

To determine the normal median nerve somatosensory evoked potentials in cat and to evaluate the effect of temperature change, following experiment was done. Median nerve somatosensory evoked potentials(MNSEP) were recorded in 45 mongrel cats at 38.5 degrees C, the normal temperature range in cats, and in 8 cats of them MNSEP was recorded at 37.5 degrees C, 36.5 degrees C and 35.5 degrees C additionally. The results were as follows ; 1) Seven peak waves were always recorded and they were named as I, II, P1, III, N1, P2, N2, and central conduction time(CCT) was thought as I-N1 interpeak latency and it was 5.81+/-0.53msec. 2) The peak latencies of all waves and CCT were increased gradually as temperature decreased. The latencies of the late waves increased more than those of early waves as temperature decreased except N2.
Animals ; Cats* ; Evoked Potentials, Somatosensory* ; Median Nerve*