What is Altered States?
Altered states of consciousness (ASCs) are temporary deviations from ordinary waking awareness characterized by measurable changes in subjective experience, perception, cognition, emotion, sense of self, or sense of time. First formally defined by psychiatrist Arnold Ludwig in 1966, altered states encompass a spectrum ranging from light trance and meditative absorption to profound mystical experiences and ego dissolution. These states may be induced voluntarily through contemplative practices, breathwork, rhythmic movement, fasting, sensory deprivation, or psychoactive substances, or may arise spontaneously during dreaming, near-death experiences, psychotic episodes, or extreme physical exertion. While the phenomenology varies widely, common features include intensified or diminished sensory perception, altered body awareness, disruption of linear time sense, emotional amplification, access to unconscious material, and—in deeper states—loss of subject-object duality.
Origins & Lineage
Deliberate cultivation of altered states constitutes one of humanity’s oldest technologies of consciousness. Archaeological evidence suggests shamanic trance practices emerged at least 30,000 years ago, with cave paintings in Lascaux and Chauvet depicting therianthropic figures consistent with shamanic journey states. The Rigveda (circa 1500 BCE) describes soma-induced visions; the Eleusinian Mysteries of ancient Greece (circa 1500 BCE–392 CE) employed entheogenic kykeon to induce mystical revelation. Buddhist texts from the 5th century BCE systematically catalog jhānas (meditative absorptions), while Patanjali’s Yoga Sutras (circa 400 CE) outline samādhi states achieved through concentration.
The scientific study of altered states began in the late 19th century with William James’s The Varieties of Religious Experience (1902), which examined mystical consciousness across traditions. In 1966, Arnold Ludwig published the landmark paper “Altered States of Consciousness” in the Archives of General Psychiatry, establishing formal diagnostic criteria. Subsequent decades saw significant research contributions from Stanislav Grof (holotropic states through breathwork and psychedelics), Charles Tart (state-specific sciences), and the psychiatric classification of dissociative states. Neuroscientific investigation accelerated in the 1990s with functional brain imaging revealing distinct neural signatures—decreased default mode network activity, altered thalamic gating, shifts in neurotransmitter balance—underlying various altered states.
How It’s Practiced
Altered states manifest through diverse methodologies across traditions. In seated meditation, practitioners report progression from relaxed concentration through absorption states marked by diminished body awareness and thought cessation, sometimes culminating in non-dual awareness where the sense of observer dissolves. Holotropic breathwork sessions—typically 2-3 hours of accelerated breathing accompanied by evocative music—produce states ranging from emotional catharsis to visionary experiences and somatic release.
Entheogenic ceremonies follow culture-specific protocols: ayahuasca ceremonies in the Shipibo tradition involve icaros (healing songs) and strict dieta preparation; psilocybin ceremonies may incorporate intention-setting, guided meditation, and integration practices. Whirling dervishes achieve trance through sustained rotation; Sufi dhikr practitioners enter altered states through rhythmic recitation of divine names. Sensory deprivation tanks eliminate external stimuli, inducing theta brainwave states associated with hypnagogia and creative insight. Ecstatic dance, drumming circles, and conscious raving employ rhythmic entrainment to shift awareness.
Physiologically, altered states typically involve measurable changes: shifts in brainwave patterns (increased theta or gamma activity), altered autonomic nervous system balance, changes in neurotransmitter levels (serotonin, dopamine, endorphins), and modified activity in specific brain regions including the prefrontal cortex, posterior cingulate cortex, and amygdala.
Altered States Today
Contemporary seekers encounter altered states through multiple channels. Mindfulness meditation centers and apps like Insight Timer provide structured entry points through guided body scans and concentration practices. Breathwork facilitators offer holotropic, transformational, or Wim Hof method sessions in group and individual formats. Ketamine-assisted therapy has gained FDA approval for treatment-resistant depression, while psilocybin therapy is advancing through Phase 3 clinical trials.
Retreat centers globally offer intensive altered-state immersions: 10-day Vipassana courses in the Goenka tradition, ayahuasca ceremonies at centers like Temple of the Way of Light in Peru, or holotropic breathwork workshops through Grof-certified facilitators. Sound healing experiences using gongs, crystal bowls, and binaural beats have proliferated in urban wellness spaces. Float therapy centers provide sensory deprivation tanks commercially. Academic institutions including Johns Hopkins Center for Psychedelic and Consciousness Research and Imperial College London’s Centre for Psychedelic Research conduct controlled studies, contributing to mainstream legitimization.
The psychedelic renaissance since 2010 has catalyzed renewed scientific and public interest, with MDMA-assisted therapy for PTSD and psilocybin for depression showing promising clinical outcomes. Integration coaching has emerged as a profession supporting individuals in processing altered-state experiences.
Common Misconceptions
Altered states are not inherently therapeutic, spiritual, or beneficial. Context, preparation, and integration determine whether an experience proves generative or destabilizing. Not all altered states involve mystical content; some are primarily somatic or emotional. “Higher” consciousness is a value-laden term; altered states represent different modes of processing, not necessarily superior ones.
Altered states do not grant access to objective truth or supernatural realms, though they may produce profound subjective conviction. Correlation between mystical experience and lasting psychological benefit is inconsistent; some individuals experience adverse events including psychotic breaks, retraumatization, or spiritual bypass. Psychedelic experiences, while often catalytic, require significant psychological work; the substance itself does not “do the healing.”
Altered states are not rare or exotic. Everyday experiences like highway hypnosis, flow states during exercise, absorption in music or film, and hypnagogic states before sleep constitute mild altered states. The binary between “ordinary” and “altered” consciousness is heuristic rather than absolute.
How to Begin
For direct experience, establish a basic meditation practice first. The Insight Meditation Society offers free online instructions in concentration and mindfulness techniques that provide safe, gradual exposure to subtle shifts in awareness. The Mind Illuminated by Culadasa (John Yates) provides a systematic, stage-based approach to meditative states.
For breathwork, seek Grof-certified holotropic breathwork practitioners or trauma-informed facilitators trained in modalities like Transformational Breath or Clarity Breathwork. Ensure medical screening; breathwork is contraindicated for certain cardiovascular and psychiatric conditions.
For intellectual foundation, read William James’s The Varieties of Religious Experience, Stanislav Grof’s Psychology of the Future, and Michael Pollan’s How to Change Your Mind for contemporary psychedelic context. Charles Tart’s anthology Altered States of Consciousness provides scientific overview.
If considering entheogens, prioritize legal contexts (psilocybin retreats in jurisdictions where decriminalized, ketamine therapy with licensed providers) and extensively vet facilitators for training, ethics, and safety protocols. Personal or family history of psychotic disorders constitutes significant risk. Integration support—through therapists trained in psychedelic integration or peer groups—is essential.
Begin with less intense modalities: attend a sound bath, try a float tank session, or practice simple breathwork exercises like box breathing before committing to multi-hour immersions or powerful substances.