AP PSYCHOLOGY

Detailed explanation-1: -The activation-synthesis hypothesis, proposed by Harvard University psychiatrists John Allan Hobson and Robert McCarley, is a neurobiological theory of dreams first published in the American Journal of Psychiatry in December 1977.

Detailed explanation-2: -Hobson and McCarley argue that dreams occur when the mind tries to make sense of the activity in the brain which is taking place whilst someone sleeps. They also believe that the brain activity that occurs (especially during REM sleep) serves some other purpose, such as restoration and protein synthesis.

Detailed explanation-3: -The activation-synthesis model suggests that dreams are caused by the physiological processes of the brain. While people used to believe that sleeping and dreaming was a passive process, researchers now know that the brain is anything but quiet during sleep.

Detailed explanation-4: -Allan Hobson and Robert McCarley (1977) devised the activation-synthesis hy pothesis to explain dreaming in REM sleep. (They called it “D” sleep, the “D” referring to both desynchronized brain waves and dreaming.)

Detailed explanation-5: -Hobson’s AIM (Activation-Input-output gating, Modulation) model of waking, sleeping, and dreaming consciousness. It builds upon Hobson and Robert W. McCarley’s “activation-synthesis” neurophysiological model of dream generation and connects with Karl J.