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9、 i dpieces of qu an titative infom nation, without a doubt the g r eatest advanc e instermlogyinrecetr t yearshasbeenthedeve l opmentofnewmethodsforcanningcells. Cel l num berisofc nitcalin ter esttomarr ybiologis ts,whethertheybeinterestedin此dev elopmen t oforgpns, disease pr ocesses, cel l bi叭 the
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11、thods Wenowhavemethodsforestimating forexample: 此totalnu mb erofneuors inthebrainandinspec i f icregionsofthebrain - Thesemethods二of great inte r est to those studying the pathogenesis of conditions such a s Alzheimers disease, Parldrisonsdi, 尸 月 甲and motorneuron We can now estimatethe totalnu m ber
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