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Cognition-Emotions

A neural correlate of sensory consciousness in a corvid bird

By September 25, 2020October 19th, 2020No Comments

Document type : scientific article published in Science

Authors : Andreas Nieder, Lysann Wagener, Paul Rinnert

Preview : Subjective experiences that can be consciously accessed and reported are associated with the cerebral cortex. Whether sensory consciousness can also arise from differently organized brains that lack a layered cerebral cortex, such as the bird brain, remains unknown. We show that single-neuron responses in the pallial endbrain of crows performing a visual detection task correlate with the birds' perception about stimulus presence or absence and argue that this is an empirical marker of avian consciousness. Neuronal activity follows a temporal two-stage process in which the first activity component mainly reflects physical stimulus intensity, whereas the later component predicts the crows' perceptual reports. These results suggest that the neural foundations that allow sensory consciousness arose either before the emergence of mammals or independently in at least the avian lineage and do not necessarily require a cerebral cortex.

Article discussed in Science : Birds do have a brain cortex — and think

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