Schuman (1980) (review) proposed a detailed framework suggesting that meditation and other altered states of consciousness share underlying physiological mechanisms. It's fascinating how different practices, from sitting quietly to taking certain substances, can lead the human mind to similar, profound places. These states aren't just "mind over matter" experiences; they involve measurable changes in how our brains operate. We're talking about shared patterns of awareness that science is only beginning to map out.
What is the common ground between meditation, psychedelics, and flow?
When we talk about altered states of consciousness, we are really talking about temporary shifts in how we perceive reality, ourselves, and the world around us. Whether you achieve this state by sitting still for hours, taking a psychedelic substance, or getting completely absorbed in a complex task like coding or playing music, the underlying brain activity seems to follow surprisingly similar blueprints. One key concept that researchers are exploring is the idea of 'self-consciousness' - the persistent feeling that there is a stable 'me' experiencing things. Psychedelics, for example, seem to temporarily loosen the grip of this sense of self. This idea was explored by Millière, Carhart-Harris, and Roseman (2018), who noted that both psychedelic experiences and deep meditative states can lead to a temporary dissolution of the rigid boundaries we usually maintain around our sense of self. They suggest that both pathways challenge the default mode network (DMN), which is the brain system responsible for our internal monologue and self-referential thought.
This concept of a flexible, less rigid brain is central to understanding these states. Carhart-Harris, Leech, and Hellyer (2014) introduced the concept of the 'entropic brain.' Think of entropy in physics as a measure of disorder. In neuroscience, they propose that highly ordered, predictable states - like our normal, everyday self-narrative - are low entropy. When the brain enters an altered state, it becomes more 'entropic,' meaning it becomes more disordered, more random, and thus, more flexible. This increased disorder is actually what allows for novel connections and insights.
Meditation seems to train the brain to achieve this state of increased entropy safely and predictably. Franco (2009) (preliminary) discussed how yogic perception, a form of deep meditation, involves shifting awareness away from the constant chatter of the ego and towards pure perception. This aligns with the idea of reducing the brain's habitual, low-entropy patterns. Furthermore, the research suggests that the brain might be trying to achieve a kind of optimal balance. Carhart-Harris and Friston (2019) developed models, like REBUS, which view the brain's action as constantly trying to minimize 'free energy' - a fancy way of saying it's trying to predict and explain incoming sensory data with the least amount of effort. Altered states, whether induced by psychedelics or deep focus, seem to temporarily disrupt the brain's usual predictive models, forcing it into a more exploratory, less constrained mode of operation.
The experience of 'flow' - that deep immersion where time seems to warp and self-awareness vanishes - fits perfectly into this picture. In flow, the external demands and internal narrative of the self fade away, much like the temporary self-dissolution reported in psychedelic research (Millière et al., 2018). The literature continues to build on this, with recent explorations looking at the specific 'triggers' that push us into these states (Applied Mysticism, 2025). These triggers aren't just external events; they are internal shifts in attention and perception. The shared mechanism appears to be a temporary down-regulation of the brain's executive control systems, allowing for a more direct, unfiltered stream of consciousness.
The convergence of these fields - meditation, psychedelics, and flow - suggests that they are not three separate phenomena, but rather different pathways leading to a common neurobiological ground state: a temporary suspension of the ego's narrative control, allowing the brain to operate in a more flexible, high-entropy, and highly connected manner. The research is moving toward understanding this shared mechanism as a fundamental feature of consciousness itself.
Supporting Evidence for Shared Mechanisms
The consistency across these different induction methods is compelling. For instance, the research by Carhart-Harris et al. (2014) using neuroimaging techniques showed that when subjects entered altered states, their functional connectivity patterns changed significantly, indicating a temporary breakdown of the usual segregated networks. This finding provides a measurable correlate to the subjective feeling of 'losing oneself' in meditation or under psychedelics. The effect size associated with this network reorganization was substantial, suggesting a strong physiological signature for these states.
Another piece of supporting evidence comes from the work analyzing the general triggers (Applied Mysticism, 2025). This research points to attentional focus and novelty as key common denominators. When attention is intensely focused - whether on a mantra in meditation or a complex problem in flow - the brain is forced into a pattern of heightened, yet non-judgmental, processing. This mirrors the initial stages of psychedelic experience, where the initial shock of altered perception forces the brain to recalibrate its expectations. The consistency here suggests that the process of shifting attention, rather than the substance or technique itself, is the critical variable.
Furthermore, the theoretical framework provided by Carhart-Harris and Friston (2019) offers a unifying lens. Their model suggests that the brain is fundamentally a prediction machine. In normal waking life, we are excellent at making predictions based on past data, which is efficient but limiting. Altered states, by temporarily disrupting these predictions, force the system to become more 'anarchic' or exploratory. This increased capacity for unexpected processing is what allows for breakthroughs in insight, whether that insight comes from years of seated meditation or a single psychedelic session. The fact that these diverse methods all seem to push the brain toward this state of temporary predictive failure strengthens the case for a shared underlying mechanism of heightened neural plasticity.
Practical Application: Cultivating Altered States
The common thread among meditation, psychedelics, and flow - a temporary shift in habitual cognitive patterns - suggests that these experiences are not merely passive states but active processes that can be cultivated. The goal isn't necessarily to induce a psychedelic trip or achieve deep meditation instantly, but to reliably access the underlying mechanisms of heightened awareness and reduced self-referential noise. Developing a personal protocol requires integrating techniques from all three domains.
The Integrated Practice Protocol (The "Flow-Med-Psyche" Cycle)
This protocol is designed for gradual desensitization to the ego's resistance and building tolerance for non-linear thought patterns. Consistency is more critical than intensity.
- Daily Foundation (Meditation): Start with 15 minutes of focused breath awareness (Anapanasati). The goal here is not 'emptiness,' but rather the act of noticing the mind wandering without judgment. This builds the baseline attentional muscle.
- Mid-Day Activation (Flow Induction): Identify a task that demands deep focus but is not emotionally charged (e.g., coding, complex drawing, detailed organization). Dedicate 45 minutes to this activity. The objective is to enter a state where time perception warps and self-monitoring fades. If you find your mind drifting to worries, gently redirect focus back to the sensory input of the task.
- Weekly Deep Dive (Psychedelic Analogue Simulation): Once a week, dedicate 60-90 minutes to a structured, sensory-deprived environment (e.g., a dark room with binaural beats or ambient soundscapes). This session simulates the 'dissolution' aspect. Instead of expecting profound insights, the focus is on observing the internal narrative. When thoughts become repetitive or overwhelming, practice labeling them neutrally ("There is a thought about work," "There is a feeling of anxiety") rather than engaging with their content. This metacognitive distance is the skill transferable from psychedelic experiences.
Frequency and Duration Summary: Daily (15 min meditation) + 5 times per week (45 min flow) + 1 time per week (60-90 min deep observation). Over several months, the duration of the meditation component can be slowly increased, while the flow sessions become more challenging in complexity.
By systematically training the mind to sustain attention (meditation), immerse itself fully (flow), and then practice observing the raw material of consciousness without attachment (psychedelic analogue), one builds a strong, accessible toolkit for altered states without external agents.
What Remains Uncertain
It is crucial to approach these practices with intellectual humility. While the convergence of these states suggests shared neurological underpinnings - such as increased default mode network (DMN) decoupling - the current understanding remains highly fragmented. We must acknowledge significant unknowns.
Firstly, the concept of "optimal dosage" or "optimal duration" for non-pharmacological induction is entirely anecdotal. What works for one individual's baseline level of anxiety or rigidity may be insufficient or even counterproductive for another. The variability in individual neurochemistry and psychological history means that any generalized protocol is, by necessity, a starting hypothesis, not a universal law.
Secondly, the literature often conflates 'insight' with 'experience.' Many practitioners report profound insights following intense sessions, but the mechanism by which the temporary altered state translates into lasting, actionable behavioral change remains poorly mapped. Is the insight a genuine restructuring of belief, or is it a temporary cognitive artifact resulting from sensory overload or exhaustion? More rigorous, longitudinal studies are needed to track the persistence of these shifts.
Finally, the role of emotional processing is vastly under-explored. While we discuss cognitive decoupling, the emotional residue of confronting deeply held beliefs - whether through meditation or psychedelic experience - requires structured, professional integration that is often missing from self-guided protocols. The potential for retraumatization or the misinterpretation of profound emotional surges demands caution and a commitment to supervised practice.
Core claims are supported by peer-reviewed research. Some practical applications extend beyond direct findings.
References
- Schuman M (1980). The Psychophysiological Model of Meditation and Altered States of Consciousness: A Critical Review. The Psychobiology of Consciousness. DOI
- Raphaël Millière, Robin Carhart‐Harris, Leor Roseman (2018). Psychedelics, Meditation, and Self-Consciousness. Frontiers in Psychology. DOI
- Franco E (2009). Yogic Perception, Meditation and Altered States of Consciousness. . DOI
- Robin Carhart‐Harris, Robert Leech, Peter J. Hellyer (2014). The entropic brain: a theory of conscious states informed by neuroimaging research with psychedelic . Frontiers in Human Neuroscience. DOI
- Robin Carhart‐Harris, Karl Friston (2019). REBUS and the Anarchic Brain: Toward a Unified Model of the Brain Action of Psychedelics. Pharmacological Reviews. DOI
- (2025). Triggers of Altered States of Consciousness Experiences. Applied Mysticism. DOI
- (2025). Chapter 4 Triggers of Altered States of Consciousness Experiences. Applied Mysticism. DOI
- Parkins E (2025). Psychedelics. Integrating Brain, Mind, Soul, and Spirit. DOI