Although the right hemisphere is often referred to as the nondominant or minor hemisphere, this chapter delineates its dominant and lateralized contributions to various cognitive and behavioral functions, including language, emotions, facial recognition, nonverbal memory, visuospatial processing, behavioral and delusional syndromes, that are often complementary to the dominant and lateralized functions of the left hemisphere. The presence of persistent hemispatial neglect is associated with poor functional outcome as measured by the ability to live independently. Amnesias with temporally short retrograde deficits have been conceptualized as pure or core amnesias because they are usually not contaminated by other cognitive-behavioral disturbances, such as confabulation or frontal executive dysfunction. Agnosias are considered relatively rare disorders because, traditionally, they were described in patients following discrete bilateral lesions. Most studies have found that motor impersistence is observed more commonly after right- compared to left-sided hemispheric lesions, with many patients having a left hemiparesis.