Imaging is superior to cognitive testing for early diagnosis of Alzheimer's disease.

Alzheimer's disease (AD) starts at a molecular level possibly decades earlier than could be detected by neuropsychological tests (NPTs). Neuropathological and neuroimaging data suggest that amyloid accumulation precedes the clinical onset of AD. Disease-modifying agents would have to be used early to alter the course of AD.

Unilateral spatial neglect: assessment and rehabilitation strategies.

Unilateral spatial neglect is one of the most striking disorders of cognition. Focal brain lesions, more commonly on the right, produce profound deficits in the awareness of contralateral self and space. This article reviews the assessment and current theoretical explanations of neglect, in light of rehabilitation.