By Manfred Oehmichen Roland N. Auer Hans G. Konig
Incorporating the latest literature and state of the art equipment, this useful paintings and atlas covers the full area of neuropathology for forensic pathologists in addition to for experts in linked fields. Its concise, direct kind presents the reader with succinct and easy-to-find solutions to forensic, pathological, pathophysiological, biomechanical, and molecular biology difficulties. also, the authors hide a number of easy and functional difficulties which may stimulate additional examine. every one bankruptcy contains an summary of the literature in addition to exact references, and lines a wealth of figures, graphs, and tables. the current quantity bargains with particular elements of neuropathology, and is especially applicable for all these and considering the sector of forensic pathology, forensic sciences, medical pathology, neurology, neurosurgery, legislation, and criminology. distinctive emphasis is put on services in regards to the field's relevance for daily perform and in addition on updated info in uncomplicated examine.
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The medical expert‘s main task is to provide guidance and assistance to the court in rendering a scientifically tenable decision (Weinstein 1999). Among the surveys of the tasks of the expert witness in court are those of Myers (2001) and Shevell (2001). In most cases, the candidate expert is put in the witness stand to answer questions about his educational accomplishments, specialized training, and relevant experience. The judge must be convinced that the candidate possesses sufficient expertise to qualify as an expert.
The latter induces a flow of Na+ into the cell driven by the concentration gradient and membrane potential. The inflow of Na+ ions ceases once the membrane depolarizes to +55 mV. The action potential is the result of an invariable all-or-nothing phenomenon. Messages can only be varied by a variation in the rate of action potentials, which in turn depends on the degree of depolarization. Some neurons are capable of a maximum frequency of action potentials exceeding 100 per second (100 Hz). The velocity at which an impulse is conducted depends on the axon‘s diameter and myelin thickness and in meters per second is roughly 6 times the axonal diameter in microns.
62f). In addition to these degenerative changes of the cells themselves, pathological processes can be initiated by non-specific damage to axons and dendrites, as well as by regenerative processes. Since these negative and positive types of reactions affect all nervous tissue, not just neurons, they will be discussed in Chap. 4, “Cell and Tissue Reactions” (pp. 42ff). Ischemic cell necrosis is a specific pathological reaction of the neuron and is described in detail in Chap. 13. For details on the morphology and pathogenesis of the other specific pathological changes of neurons, the reader is referred to the relevant neuropathology textbooks (especially Haymaker and Adams 1982; Graham and Lantos 2002; Peiffer et al.
Forensic Neuropathology and Neurology by Manfred Oehmichen Roland N. Auer Hans G. Konig