Documented Condition.
Established medical and neurological conditions — real, recorded, and reproducible. 27 case files in the archive.
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Foreign Accent Syndrome
The rare neurological disorder in which brain injury alters speech so it sounds foreign. The real mechanism, the famous 1941 Norwegian case, and why waking up speaking a new language is a myth.
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Phantom Limb
The documented sensation, movement, and pain amputees feel in a limb that is no longer there. Silas Weir Mitchell 1871 description, the cortical-remapping explanation, and Ramachandran mirror-box therapy.
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The Placebo & Nocebo Effects
The documented, measurable physiological responses to expectation alone. The endogenous-opioid and dopamine mechanisms, open-label placebo studies, and why these are real biology, not imagination.
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Savant Syndrome
Extraordinary islands of skill (memory, calendar calculation, music, art, math) alongside disability, and the rare acquired savant who gains such abilities after brain injury. Kim Peek, Treffert research, and hidden brain capacity.
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Synesthesia
The documented neurological condition in which one sense automatically triggers another: seeing colors in letters, tasting words, hearing shapes. The grapheme-color type, the cross-activation explanation, and how it is tested.
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The Capgras & Cotard Delusions
The Capgras delusion (my family have been replaced by impostors) and the Cotard delusion (I am dead). Two documented neuropsychiatric conditions, the disconnection between recognition and emotion, and what they reveal about the self.
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Blindsight
The documented condition in which people blinded by damage to the visual cortex can still respond to visual stimuli they cannot consciously see. Weiskrantz patient DB, the second visual pathway, and what it reveals about consciousness.
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Prosopagnosia (Face Blindness)
The documented inability to recognize faces despite intact vision and intelligence. The fusiform face area, the acquired and developmental forms, and how people who cannot recognize their own families cope.
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Aphantasia
The documented absence of a minds eye, the inability to voluntarily form mental images. Galton 1880 foreshadowing, Adam Zeman 2015 naming, the spectrum to hyperphantasia, and what it reveals about imagination and memory.
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Fatal Familial Insomnia
The rare inherited prion disease that destroys the thalamus and the ability to sleep, leading to dementia and death. The PRNP mutation, the Italian family that revealed it, and the sporadic form.
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Sleep Paralysis
The documented state of being awake but unable to move, often with a sense of a presence in the room. The REM-atonia mechanism, the cross-cultural folklore (the Old Hag, kanashibari), and its link to alien abduction and night-demon experiences.
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Alien Hand Syndrome
The documented condition in which a person hand acts purposefully but involuntarily, feeling as if it has a will of its own. The split-brain and frontal/callosal lesion causes, and what it reveals about will and agency.
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The McGurk Effect
The documented audiovisual illusion in which watching a mouth shape one sound while hearing another makes you perceive a third. The 1976 discovery, the multisensory-integration mechanism, and why it persists even when you know.
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Alice in Wonderland Syndrome
The documented condition of distorted perception of size, shape, body image, and time. The migraine and Epstein-Barr links, the 1955 naming, and why it is usually benign and transient.
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Exploding Head Syndrome
The documented, harmless sleep phenomenon in which a person perceives a sudden loud noise, like a bang or explosion, while falling asleep or waking. The sleep-transition mechanism, the lack of pain, and why it is benign.
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Hyperthymesia
Highly Superior Autobiographical Memory, the documented ability to recall an extraordinary amount of ones personal past in vivid detail. The first case AJ, the McGaugh research, the specific nature of the gift, and what it reveals about memory.
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Out-of-Body Experiences
The documented sensation of perceiving the world from outside ones physical body. Olaf Blanke temporoparietal-junction induction, the multisensory-integration mechanism, the VR body illusions, and the survivalist debate.
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Déjà Vu
The documented, near-universal feeling of having already experienced the present moment. The temporal-lobe basis, the familiarity-recollection mismatch, Anne Cleary VR experiments, the epilepsy link, and why it is not premonition or a past life.
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Hyperphantasia
Imagery as vivid as real seeing, the extreme opposite of aphantasia. Adam Zeman naming, the enhanced brain connectivity, the links to creativity and vivid memory, and what it reveals about the range of the mind eye.
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Mirror-Touch Synesthesia
Feeling on your own body the touch you see happen to someone else. The mirror-system and somatosensory basis, the empathy link, the Banissy and Ward research, and how it is objectively tested.
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Charles Bonnet Syndrome
Vivid visual hallucinations in people losing their sight, with full insight the visions are not real. The 1760 origin, the release-hallucination (deafferentation) mechanism, the phantom-limb analogy, and why it is under-diagnosed.
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Akinetopsia (Motion Blindness)
Motion blindness, the rare inability to perceive movement, seeing the world as a series of frozen snapshots. The patient L.M., the V5/MT motion area, the TMS demonstrations, and what it reveals about how the brain builds motion.
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Anton Syndrome (Blindness Denial)
Cortical blindness in which the patient denies being blind and confabulates a visual world. The occipital-lobe damage, the anosognosia, the Anton-Babinski history, and what it reveals about self-awareness.
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Reduplicative Paramnesia
The delusional belief that a place has been duplicated or relocated. Arnold Pick 1903 naming, the right-hemisphere and frontal basis, the link to the Capgras delusion, and what it reveals about place and memory.
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Prosopometamorphopsia (Distorted Faces)
The rare condition in which faces appear distorted, drooping, or demonic. The 2024 Dartmouth demon-face study, the face-network basis, how it differs from prosopagnosia, and why it is misread as hallucination.
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Lucid Dreaming
Proved in a sleep lab in 1975 by signalling with the eyes, since REM paralysis spares them. What the brain is doing, how common it is, and the 2021 study that held a conversation with a sleeping person.
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Misophonia
Rage at the sound of chewing. Named in 2001, given a brain basis in the anterior insular cortex in 2017, formally defined in 2022 - and still absent from every diagnostic manual.