Download Advances in Stereotactic and Functional Neurosurgery 11: by C. H. A. Meyer, A. Detta, C. Kudoh (auth.), Assoc. Professor PDF

By C. H. A. Meyer, A. Detta, C. Kudoh (auth.), Assoc. Professor Dr. Björn A. Meyerson, Professor Dr. Christoph Ostertag (eds.)

This quantity includes chosen contributions from the XIth assembly of the eu Society for Stereotactic and practical Neurosurgery held in September 1994 in Antalyaffurkey. lots of the papers care for the various healing and technical developments made during this box of neurosurgery. The emergence of recent stereotactic methodologies equivalent to frameless stereotaxy and other kinds of neuronavigation became an vital software for all sorts of neurosurgical operations. increasingly more younger neurosurgeons takes an curiosity within the neurosurgical techniques to the remedy of move problems, persistent soreness and epilepsy. it is a transparent signal ofthe transforming into knowledge of the lengthy missed undeniable fact that those neurosurgical remedies will be provided to giant sufferer populations. Neurotransplantation as a singular therapy of Parkinson's disorder has lead the way for the applying of this know-how for different symptoms. The pioneering paintings played through the overdue Edward Hitchcock is reviewed right here. there's a renewed curiosity in pallidotomy for facing yes varieties of Parkinson's sickness and likely features of this operation are mentioned in one other paper. development within the neurosurgical remedy of ache is handled by way of contributions on subtle options of percutaneous cordotomy, DREZ operations and significant reviews of spinal wire stimulation. a singular process is a record at the studies of treating melanoma soreness via intraspinal implantation of chromaffin cells. numerous contributions disguise the $64000 problems with novel options for the learn of neural disorder, peroperative tracking with puppy, microrecording, magneto-encephalography and different techniques.

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Additional info for Advances in Stereotactic and Functional Neurosurgery 11: Proceedings of the 11th Meeting of the European Society for Stereotactic and Functional Neurosurgery, Antalya 1994

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3. Case 2: Records of movements and muscular activation during passive and active movements Case 1. Male, familial spastic paraparesis, 50 years old, 25 years of disease history, grade 5 of the Ashworth scale. By analizing the biomechanical and electromyographic data the spastic paraparesis this case can be characterized as the first type where the main feature was the low stretch reflex thresholds. of stretch reflex activation particularly in the extensor muscles. There was an improved pattern of recruitment of knee extensor units during voluntary contractions at low velocity (60°/sec) but at high velocity (180°/sec) the interference of the enhanced stretch reflexes of the extensor muscles was unchanged.

A reduction in CMAP amplitude probably indicates a partial nerve conduction block and suggests the presence of neurapraxia or structural damage (axonotmesis or neuronotmesis). During MVD surgery, only a few of our patients (with mild and transitory facial deficits) have shown changes in CMAP, none of which was significant; however, a reduction in amplitude or the complete suppression of CMAP has frequently been observed in patients undergoing acoustic neurinoma surgery, and this has invariably been associated with facial paresis or paralysis.

The electrode is extruded into the brain for up to 20 mm beyond the end of the guide tube in small increments using a hydraulic microdrive. Single unit activity detected by the microelectrode is amplified (DAM 80, World Precision Instruments) and filtered (200-5000 K) to remove unwanted frequencies. Tracings are displayed on an oscilloscope and fed to an audio monitor. Data are stored on videotape using an 8 channel digital recording device (Instrutech). M icroelectrode Stimulation The delivery of small electric currents through the microelectrode tip is carried out with a constant current stimulus isolation unit and pulse generator (World Precision Instruments).

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