Subspace, Measured: The Neuroscience of Altered States in BDSM

Ask anyone who has spent time on the receiving end of an intense scene to describe subspace and you will hear the vocabulary of mystics. Floating. Time dissolving. A quiet that has weight. A sense that the self has stepped aside and something else is breathing.

For a long time this was dismissed as the language of people trying to justify something strange. Then a small group of researchers at Northern Illinois University, led by Brad Sagarin, did the obvious thing: they measured it.

What the lab found

The key study is Ambler and colleagues (2017), published in Psychology of Consciousness: Theory, Research, and Practice. Fourteen experienced switches, people comfortable in both roles, were randomly assigned to top or bottom in their own scenes. Before and after, they completed a Stroop task, a standard test of executive control, along with measures of flow and altered states.

The bottoms got worse at the Stroop task after the scene, a pattern consistent with what Arne Dietrich called transient hypofrontality: a temporary downregulation of the dorsolateral prefrontal cortex, the region that runs planning, self-monitoring and the inner narrator. Both tops and bottoms reported similar levels of flow (Live Science, reporting the early results).

So the two roles enter altered states by different routes. The bottom's executive self quiets. The top enters absorbed, focused attention, the state athletes and musicians describe. Each needs the other to get there.

Earlier work from the same group (Sagarin et al., 2009, Archives of Sexual Behavior) measured cortisol at a kink event. Bottoms' stress hormones rose during scenes, and couples whose scenes went well reported increased closeness afterwards. A related study of an intense ritual, the "Dance of Souls," found cortisol climbing while participants reported feeling less stressed (Lee et al., 2016, PLoS ONE). Body alarmed, mind at peace. That gap is one of the signatures of an altered state.

Hypofrontality is an old friend

Dietrich proposed transient hypofrontality in 2003 to explain the runner's high, meditation and other states in which the prefrontal cortex gives up some of its control. The phenomenology is familiar from every contemplative tradition: the observing self thins out, time distorts, experience becomes immediate.

This matters for how we talk about kink. Subspace sits in the same family as states people chase through long-distance running, ecstatic dance, breathwork and prayer. The route is unusual. The destination is ancient.

Tantric traditions understood this territory well. Practices designed to overwhelm ordinary cognition, through intensity, ritual or the deliberate use of transgression, were understood as ways to loosen the grip of the conditioned self. A Saturday-night play party and a tantric rite are different things. The neurological doorway may be shared.

Why the frame decides everything

Here is the part I want every practitioner to hold onto. A downregulated prefrontal cortex is also a less protected one. The same state that allows surrender reduces a person's capacity to evaluate, negotiate and say stop. That is exactly why consent has to be built before the scene, and why a top's responsibility rises as the bottom drops deeper.

It is also why aftercare is physiology. Someone who has spent an hour with elevated cortisol and quieted executive function needs time to come back online. The "drop" many people feel a day or two later is real, and it deserves preparation.

The research is still small. Fourteen participants is a preliminary study, and we need larger samples and brain imaging. What we have so far points in one direction: consensual BDSM, practised with skill, is one of the more reliable ways adults have found to enter non-ordinary consciousness together.

For practitioners

If you top, track the descent. Watch breath, eye focus, speech. As the bottom's words get slower and simpler, your questions should get simpler too: yes or no, squeeze my hand. If you bottom, negotiate the depth you want before you enter, because the person negotiating afterward is literally running on less prefrontal cortex.

Hypnosis adds a further layer. It gives us language to guide someone into these states gently, hold them there safely and bring them back with care.

Guiding people safely into and out of these states is the heart of the Hypnotic Kink Retreat in Tulum, November 14 to 19.

Related reading

• BDSM and Mental Health: What the Research Actually Shows
• Consent in Erotic Hypnosis: What It Looks Like in Practice
• Dom/Sub Dynamics and the Hypnotised Mind

Sources

• Ambler, J. K., Lee, E. M., Klement, K. R., et al. (2017). Consensual BDSM facilitates role-specific altered states of consciousness: a preliminary study. Psychology of Consciousness: Theory, Research, and Practice, 4(1).
• Sagarin, B. J., Cutler, B., Cutler, N., Lawler-Sagarin, K. A., & Matuszewich, L. (2009). Hormonal changes and couple bonding in consensual sadomasochistic activity. Archives of Sexual Behavior, 38(2).
• Lee, E. M., Klement, K. R., Ambler, J. K., et al. (2016). Altered states of consciousness during an extreme ritual. PLoS ONE, 11(5).
• Dietrich, A. (2003). Functional neuroanatomy of altered states of consciousness: the transient hypofrontality hypothesis. Consciousness and Cognition, 12(2).
• Live Science: The new yoga? Sadomasochism leads to altered states