Basic bedside data-gathering—both historical and localizing—and their pragmatic clinical coordination appropriately remain the primary focus in the new edition. Biochemical, immunological, genetic, imaging, and other research developments receive their fair share of coverage, and the text touches on the theoretical impact of late-breaking technological aids like SPECT, fMRI, BEAM, and MEG, but the book's overall thrust remains clinical. For example, Lishman's discussion of Alzheimer's disease includes recent provocative research findings concerning the distribution of beta-amyloid in affected brains, amyloid precursor protein mutations and apolipoprotein E gene coding phenomena on chromosomes 21 and 19, and comparisons with the normal aging processes; however, sections on the disease's clinical features, workup, differentiation from other dementias and pseudodementias, and management remain most relevant, lucid, and reliably helpful to clinicians.