Home About us Contact
|
Home About us Contact | ||
|
|
||
Sensory Nerve Conduction (sensory + nerve_conduction)
Terms modified by Sensory Nerve Conduction Selected AbstractsA Neurologic Syndrome in Golden Retrievers Presenting as a Sensory Ataxic NeuropathyJOURNAL OF VETERINARY INTERNAL MEDICINE, Issue 6 2007K. Hultin Jäderlund Background: A sensory ataxic neuropathy has been observed in Swedish Golden Retrievers recently. Animals: Twenty-one affected Golden Retrievers. Methods: Clinical and neurologic status, electrophysiologic, and pathologic status as well as pedigree analyses were evaluated. Results: Clinical signs had an insidious onset between 2 and 8 months of age and a slowly progressive course. Affected dogs were ataxic and dysmetric. They had abnormal postural reactions and decreased spinal reflexes but no apparent muscle atrophy. Clinical pathology, radiography, and electrophysiology of motor systems were all within reference values. Sensory nerve conduction results of affected dogs were significantly different from those of a group of control dogs. Necropsy revealed a chronic progressive central and peripheral sensorimotor axonopathy; the proprioceptive pathways were most severely affected. Conclusions and Clinical Importance: This disease in these Golden Retrievers is distinct from other canine breed-related neurodegenerative diseases or hereditary neurodegenerative diseases described in humans. Pedigree analyses indicated a hereditary background, but the mode of inheritance could not be established. [source] ELECTROPHYSIOLOGICAL ABNORMALITIES IN DIABETIC PATIENTSJOURNAL OF THE PERIPHERAL NERVOUS SYSTEM, Issue 1 2000B. Lanzillo We studied 476 patients affected by diabetes: 166 male (mean age 61.6 ± 10 years, range 27,91) and 310 female (mean age 61.5 ± 8.4 years, range 25,82). Mean disease duration was 11.3 ± 7.6 years, range 0.3,37). All patients underwent surface motor and sensory nerve conduction along median, popliteal, and sural nerve. Results. Median nerve: in 3.1% of subjects sensory action potentials (SAP) was absent; sensory nerve conduction velocity (SNCV) was reduced in 41.8% in distal segment and in 27.5% in the proximal segment. Motor nerve conduction (MNCV) was reduced in 29.9% of the subjects. Sural nerve: SAP was absent in 24.4% and SNCV was reduced in 32.7%. Popliteal nerve: MNCV was abnormal in 30.4% of the subjects. Combining electrophysiological data we observed that: 1. 28.6% of the subjects resulted normal 2. 12.8% were affected by a lower limbs sensory neuropathy 3. 0.2% had a lower limbs motor neuropathy 4. 5.9% had a lower limbs sensory-motor neuropathy 5. 6.1% had a diffused sensory neuropathy 6. 30.2% had a diffused sensory-motor neuropathy 7. 16.2% had a carpal tunnel syndrome. Patients were divided in 2 groups: patients with and patients without neuropahy: the latter showed a significantly shorter disease duration (12.7 ± 8.1 vs 9.0 ± 6.3; p < 0.0001). In addition, we observed a significant correlation between disease duration and distal latency, median and popliteal MNCV, and SNCV in median and sural nerve (Regression test; p < 0.0001). Patients on insulin showed a longer disease duration and more severe electrophysiological abnormalities. [source] Medial dorsal superficial peroneal nerve studies in patients with polyneuropathy and normal sural responsesMUSCLE AND NERVE, Issue 3 2005Mark Kushnir MD Abstract We studied medial dorsal superficial peroneal (MDSP) nerves in 52 patients with clinical evidence of mild chronic sensorimotor polyneuropathy and normal sural nerve responses, in order to assess the diagnostic sensitivity and usefulness of MDSP nerve testing in electrodiagnostic practice. To determine the effect of age on MDSP nerve parameters, 98 normal subjects were also examined. Electrodiagnostic evaluation involved studies of motor nerve conduction in tibial, peroneal, and median nerves; sensory nerve conduction in sural, MDSP, median, and radial nerves; tibial and peroneal nerve F waves; H reflexes from the soleus muscles; and needle electromyography of gastrocnemius and abductor hallucis muscles. Among the patients, 49% had low-amplitude sensory responses in MDSP nerves and 57% had either slowing of sensory conduction velocity or no sensory responses on proximal stimulation. MDSP nerve amplitude, tibial nerve motor velocity, and H reflexes were the most sensitive for detection of mild chronic symmetrical axonal sensorimotor polyneuropathy. MDSP nerve testing should be included in the routine electrodiagnostic evaluation of patients with suspected polyneuropathy and normal sural nerve responses. Muscle Nerve, 2005 [source] Clinical utility of dorsal sural nerve conduction studiesMUSCLE AND NERVE, Issue 6 2001James M. Killian MD Abstract A technique of testing sensory nerve conduction of the dorsal sural nerve in the foot was used in 38 normal subjects and 70 patients with peripheral neuropathies. The normal dorsal sural sensory nerve action potential (SNAP) had a mean amplitude of 8.9 ,V (range 5,15 ,V), mean latency to negative peak of 4.0 ms (range 3.2,4.7 ms), and mean conduction velocity of 34.8 m/s (range 30,44 m/s). Optimal placement of the recording electrodes to obtain a maximal nerve action potential was proximal to digits 4 and 5. Cooling to below 25°C prolonged the latency but did not decrease the SNAP amplitude. Among the patients with peripheral neuropathy, dorsal sural SNAP was absent in 68 (97%), whereas only 54 (77%) showed abnormalities of sural sensory conduction. The diagnostic sensitivity of sensory nerve conduction studies in peripheral neuropathies may be significantly improved by the use of this technique for evaluating the action potential of the dorsal sural nerve. © 2001 John Wiley & Sons, Inc. Muscle Nerve 24: 817,820, 2001 [source] Distal sensory nerve conduction of the superficial peroneal nerve: New method and its clinical applicationMUSCLE AND NERVE, Issue 5 2001Shin J. Oh MD Abstract The superficial peroneal nerve subserves sensation on the entire surface of the dorsum of the foot, except in small areas. All previously reported techniques for evaluating nerve conduction along this nerve tested a proximal portion of the nerve. We report a new method for evaluating sensory nerve conduction of the four branches of the distal superficial peroneal nerve. Two branches to the second and third toes of the medial dorsal cutaneous nerve and two branches to the fourth and fifth toes of the intermediate dorsal cutaneous nerve were studied orthodromically and antidromically in 37 feet of 21 normal volunteers using surface stimulating and recording electrodes and with a distance of 10 cm between the stimulating and recording electrodes. Maximum nerve conduction velocities (NCV) ranged from 41.8 to 46.9 m/s, and mean response amplitude ranged from 6.5 to 7.6 ,V with the orthodromic technique. Values for NCV were almost identical when elicited by antidromic and orthodromic techniques, but response amplitudes were higher with the antidromic technique. Mean amplitudes of the distal superficial peroneal nerve were about 50% of the proximal superficial peroneal, and the conduction velocity in the distal superficial peroneal was slower than that in the proximal superficial peroneal nerve, by 8,14 m/s. In seven cases, distal superficial peroneal neuropathy was confirmed with this technique: two with proper digital neuropathy, two with medial dorsal cutaneous neuropathy, and three with intermediate dorsal cutaneous neuropathy. © 2001 John Wiley & Sons, Inc. Muscle Nerve 24: 689,694, 2001 [source] High insulin levels are positively associated with peripheral nervous system functionACTA NEUROLOGICA SCANDINAVICA, Issue 2 2009H. Isojärvi Objective,,, The aim of this study was to analyze peripheral nervous system (PNS) function in overweight and obese individuals. Materials and Methods,,, Forty-four adult non-diabetic overweight individuals were recruited. Peroneal motor nerve conduction and radial, sural, and medial plantar sensory nerve conduction were studied. Insulin and glucose levels were determined twice (over a 2- to 3-year period) with an oral glucose tolerance test (OGTT). Multiple stepwise linear regression models adjusted for age, height, weight, and skin temperature were used to analyze the data. Results,,, Analysis revealed that baseline insulin levels measured 120 min after an OGTT explained 18% of the variation in peroneal F -wave minimum latency, 8% of peroneal F -wave maximum latency variation, 15% of sural sensory latency variation, 13% of sural sensory nerve conduction velocity (NCV) variation, and 10% of the variation in medial plantar sensory NCV. Discussion and Conclusion,,, Our study shows that serum insulin levels measured 120 min after an OGGT are positively associated with PNS function. High insulin levels without notably high glucose levels appear to be beneficial for the function of the PNS. [source] | ||||||||||