Vallortigara, Giorgio (2020) Lessons from miniature brains: Cognition cheap, memory expensive (sentience linked to active movement?). Animal Sentience 29(17)
Irina Mikhalevich and Russell Powell, Minds without spines: Evolutionarily inclusive animal ethics
Studies on invertebrate minds suggest that the neural machinery for basic cognition is cheap, and that bigger brains are probably associated with greater memory storage rather than more advanced cognition. Sentience may be linked to feedforward mechanisms (Reafferenzprinzip) that allow organisms with active movement to distinguish active and passive sensing. Invertebrates may offer special opportunities for testing these hypotheses.
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