Research source

VI. Other forms of involuntary indications; "involuntary whispering;" the subconscious 334

Date of account: Published 1900
Source: Fact and Fable in Psychology
Reference: Fact and Fable in Psychology · selected passage 175
Rights: public_domain
Language: English
Record updated: 2026-08-24

Record summary

Heermann's observations also enable us to trace the anatomical conditions underlying the power of dream-vision

Published source text

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Source passage

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[15] Dr. Heermann's observations also enable us to trace the anatomical conditions underlying the power of dream-vision. From ten cases in which post-mortem examinations were held, he concludes that, allowing for much individual difference, after about twenty years the optic nerves degenerate, and often as far back as the chiasma. This shows that the nerve is not necessary for dream-vision, and thus goes to prove that the process is dependent on cerebral organs--a valuable piece of evidence fifty years ago. Esquirol records a case of sight-hallucinations in a blind woman, again indicating the same conclusion.

Historical context

Contextual commentary · mention only

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Modern context

Contextual commentary · mention only

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