The causes of variability of performance by individual subjects have rarely been investigated,
although excessive variability or inconsistency may be a functionally significant factor for …

This study examined the performance of 38 normal subjects and 43 patients with focal lesions
of the frontal lobes on a simple go–nogo task where the probability of the nogo stimulus …

There is an urgent need to identify lifestyle activities that reduce functional decline and
dementia associated with population aging. The goals of this article are to review critically the …

Evidence from anatomical and neurophysiological studies in nonhuman primates suggests
a dual-pathway model of auditory processing wherein sound identity and sound location …

This study evaluated a model of attention that postulates several distinct component processes,
each mediated by specific neural systems in the human frontal lobes. A series of reaction …

Executive functions are highly sensitive to the effects of aging and other conditions affecting
frontal lobe function. Yet there are few validated interventions specifically designed to …

The frontal lobes, comprising 25% to 33% of the human cortex (Stuss & Benson, 1986; Ra-demacher
et al., 1992), most readily differentiate a primate brain from the brains of other …

The present study addresses the question of how such an abstract concept as time is
represented by our cognitive system. Specifically, the aim was to assess whether temporal …

There is evidence that standard-dose chemotherapy may impact cognitive function in cancer
patients. The present study evaluated the effects of a combination of two anti-cancer drugs, …

Object. The goal of this study was to characterize more fully the cognitive changes that occur
during the period of acute recovery after traumatic brain injury (TBI). Methods. The pattern of …