Auditory spatial processing in Alzheimer's disease.

P = 0.18]. Auditory and visual control tasks On both auditory control tasks, the healthy control and typical Alzheimer’s disease groups performed comparably [pitch discrimination: OR = 0.65, CI 0.3 to 1.7, P = 0.38; timbre discrimination: OR = 0.78, CI 0.5 to 1.2, P = 0.25]; whereas the PCA group showed a trend towards inferior pitch discrimination performance relative to healthy controls [OR = 0.38, CI 0.1 to 1.1, P = 0.07] and a deficit of timbre discrimination relative both to healthy controls [OR = 0.41, CI 0.2 to 0.7, P = 0.003] and the typical Alzheimer’s disease group [OR = 0.53, CI 0.3 to 0.8, P = 0.004].

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