Pleasure is also linked to a loss of awareness of the boundaries of our body, and this, too, involves both sides of the brain. Orgasm and meditation dissolve the sense of physical boundary, but the activation patterns are distinct. Meditation does so in a somewhat cerebral way, altering bodily self-awareness by enhancing activity in specific brain regions, such as right angular gyrus—regions that become most lively during attempts to imagine ourselves from a stranger’s perspective, during out of body experiences or déjà vu, and in a neurologically obscure disorder in which patients lack awareness of their own paralysis or bodily infirmity.
But during orgasm, the cerebellar deep nuclei and vermis, also in the cerebellum, glow. The cerebellum used to be thought of as the “motor bit” tacked onto the back of the brain. The deep nuclei are mysterious, but they seem involved in planning and initiating movement, motor learning, rhythm, synchronizing and smoothing of movement. The vermis tracks the movement of the body through space outside of conscious awareness. Unlike meditation, orgasm seems a heightened sense of being within one’s body rather than the sense of being outside of it. The disconnected awareness meditation (“I am not my thoughts, I am not this experience”) is antithetical to the self-forgetting of sex in which wallowing in the experience, and the relationship, is precisely the point.
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