Summary
Whereas episodic, stereotype hallucinations represent irritative phenomena, analogous to ictal attacks, the continuous, variable hallucinations are interpreted as release phenomena resulting from loss or suppression of the normal visual input. The latter have only limited topical significance.
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Cogan, D.G. Visual hallucinations as release phenomena. Albrecht v. Graefes Arch. klin. exp. Ophthal. 188, 139–150 (1973). https://doi.org/10.1007/BF00407835
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DOI: https://doi.org/10.1007/BF00407835