This subject reviews the anatomy and physiology of the visual, auditory, gustatory, olfactory and somaesthetic sensory systems from periphery to cortex and explores how neural activity gives rise to our rich perceptual world. This course explores the hypothesis that all perceptions are creations of our brains and looks at how and why we have evolved this strategy. Visual and somato sensory perception are dealt with in particular detail. Students are introduced to the essentials of psychophysics.