Note 85 — Chapter V

This indeed seems to have been recognised by Wundt, who regards a 'functional rest of the sensory centres and of the apperception centre,' resulting in heightened latent energy which lends unusual strength to excitations, as a secondary condition of the dream state. Külpe (Outline of Psychology, p. 212) argues that the existence of vivid dreams shows that fatigue with its diminished associability fails to affect the central sensations themselves; this increased excitability resulting from dissociation may itself, however, be regarded as a symptom of fatigue; hyperaesthesia and anaesthesia are alike signs of exhaustion.