EEG coherence in post-LSD visual hallucinations

@article{Abraham2001EEGCI,
  title={EEG coherence in post-LSD visual hallucinations},
  author={Henry David Abraham and Frank H. Duffy},
  journal={Psychiatry Research: Neuroimaging},
  year={2001},
  volume={107},
  pages={151-163}
}

Figures and Tables from this paper

Pathological Delta Oscillations in Hallucinogen Persisting Perception Disorder: A Case Report
TLDR
Pathological delta activity over occipital brain regions may play an important role in the development and perpetuation of Hallucinogen persisting perception disorder and can be attenuated by non-invasive brain stimulation.
EEG Gamma Coherence and Other Correlates of Subjective Reports During Ayahuasca Experiences
TLDR
Findings include increased modal EEG alpha frequency and global power decreases across the cortex in most frequency bands, which concur with the EEG of psychedelics literature and find increases in global gamma coherence during peak psychedelic experiences.
The hodology of hallucinations
Other Times I Can Barely See: The Effects of Hallucinogens on Vision and Attention
TLDR
Two double-blind placebo-controlled experiments on the effects of the serotonergic drugs 3,4-methylenedioxyamphetamine (MDA) and 3, 4- methylenedioxymethamphetamine (MDMA) on attention to emotional stimuli and preliminary evidence that MDA and MDMA may modify processing of threat-related stimuli is found.
A Review of Hallucinogen Persisting Perception Disorder (HPPD) and an Exploratory Study of Subjects Claiming Symptoms of HPPD.
TLDR
Results of the survey suggest that HPPD is in most cases due to a subtle over-activation of predominantly neural visual pathways that worsens anxiety after ingestion of arousal-altering drugs, including non-hallucinogenic substances.
On Perception and Consciousness in HPPD: A Systematic Review
TLDR
Unlike the acute stages of psychedelic drug intoxication, which may be accompanied by altered states of consciousness, HPPD is rather characterized by changes in the content of consciousness and an attentional shift from exogenous to endogenous phenomena.
Visual Hallucinations in the Psychosis Spectrum and Comparative Information From Neurodegenerative Disorders and Eye Disease
TLDR
Current knowledge regarding VHs in the psychosis phenotype is brought together and contrast this data with the literature drawn from neurodegenerative disorders and eye disease to suggest that comparative studies may have potentially important clinical and theoretical implications.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 47 REFERENCES
Stable quantitative EEG difference in post-LSD visual disorder by split-half analysis: evidence for disinhibition
Effects of age upon interhemispheric EEG coherence in normal adults
Thalamocortical dysrhythmia: A neurological and neuropsychiatric syndrome characterized by magnetoencephalography.
TLDR
Spontaneous magnetoencephalographic activity was recorded in awake, healthy human controls and in patients suffering from neurogenic pain, tinnitus, Parkinson's disease, or depression, indicating the presence of a thalamocortical dysrhythmia which is responsible for all the above mentioned conditions.
Eeg coherence analysis and field dependence
Visual phenomenology of the LSD flashback.
  • H. D. Abraham
  • Psychology, Medicine
    Archives of general psychiatry
  • 1983
TLDR
Sensitivity to LSD as determined by flashbacks appears to divide the study sample into three discrete subgroups, and there may be a genetic basis to LSD sensitivity.
Common reference coherence data are confounded by power and phase effects.
A Chronic Impairment of Colour Vision in Users of LSD
TLDR
It is suggested that some users of LSD may have a sustained or irreversible impairment in colour discrimination, as shown in the comparison of users and controls.
An on-line transformation of EEG scalp potentials into orthogonal source derivations.
  • B. Hjorth
  • Geology
    Electroencephalography and clinical neurophysiology
  • 1975
Interhemispheric EEG Coherence before and after Partial Callosotomy
TLDR
Electroencephalographic coherence may prove useful as a noninvasive method for assessing interhemispheric integration under different physiological and experimental conditions.
...
1
2
3
4
5
...