Contents

14 August 2013
Vol 5, Issue 198

About The Cover

Cover image expansion

ONLINE COVER Conscious Effort. This week's cover art captures a psychedelic experience, an altered state of consciousness typically induced by drugs. Psychedelic artists use visual stimuli to convey their mind-stretching experience to viewers. But in the clinic, we lack robust measures for conscious activity in people with severe brain injuries. Now, Casali et al. describe a strategy for quantifying consciousness in human brains. This approach–which combines transcranial magnetic stimulation, electroencephalographic recordings, and computational biology–can have broad applications in the clinic and in labs studying the science of consciousness. See also the accompanying Focus by Schiff. [CREDIT: PATTY_C/ISTOCKPHOTO]