This document summarizes a lecture on attention. It discusses the different types of attention, including alertness, vigilance, and selective attention. It also describes the neurophysiology of attention, including the roles of the reticular activating system, superior colliculus, thalamus, parietal lobe, frontal lobe, and cingulate cortex. Additionally, it covers the topic of neglect, or hemineglect, including its clinical features, sensory-representational, motor-exploratory, and motivational aspects. It concludes with a discussion of the right hemisphere's dominance for spatial attention.