This chapter explores a set of senses embedded in our bodies, collectively called the somatosensory system. Johannes Muller initially proposed that different sensory nerves have their own characteristic type of activity and therefore produce different sensations. Both the spinothalamic and the lemniscal systems eventually pass on their information to the somatosensory cortex. Touch includes the sensations produced by deformation of the skin. The afferent systems then send their information to the somatosensory cortex. Some cells in the somatosensory cortex also exhibit relatively simple receptive fields, but others are more complex. Research in the field of embodied cognition shows how our sense of touch can shape the snap judgments we make without our conscious awareness. The brains of blind people can compensate for the loss of one sense by using the spare processing power of the visual cortex to enhance or expand other sensory functions. The neural processes for hearing perception undergo significant modulation by somatosensation.