Savica et al investigate the incidence and distribution of specific types of parkinsonism and related proteinopathies in the general population.

Friedman et al used brain magnetic resonance spectroscopy to examine the neurochemical effects of growth hormone–releasing hormone in adults with mild cognitive impairment and in healthy older adults.

Palacios et al studied functional magnetic resonance imaging abnormalities in signal amplitude and brain connectivity at rest and their relationship to cognitive outcome in patients with chronic and severe traumatic axonal injury.

In an observational study based on Safe Implementation of Treatment in Stroke International Stroke Thrombolysis Register (SITS-ISTR) data during the period from 2002 to 2011, Ahmed and coauthors compare outcomes of patients who were treated within 4.5 to 6 hours or within 3 to 4.5 hours of the onset of an ischemic stroke with outcomes of patients who were treated within 3 hours in the SITSISTR.

Ducharme et al investigate whether a positive Pittsburgh Compound B scan is specific for the diagnosis of Alzheimer disease or can be secondary to cerebral amyloid angiopathy alone.