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Updated: Apr 8, 2026

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Electroporation of the Hindbrain to Trace Axonal Trajectories and Synaptic Targets in the Chick Embryo
Published on: May 29, 2013
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ANIMAL COGNITION. Comment on "Number-space mapping in the newborn chick resembles humans' mental number line"
Madhur Mangalam1, Shraddha Madhav Karve2
1Department of Psychology, University of Georgia, Athens, GA 30602, USA. madhur.mangalam@uga.edu.
Abstract:
Rugani et al. (Reports, 30 January 3015, p. 534) tested 3-day-old domestic chicks using an innovative experimental setup and demonstrate the presence of the mental number line. We raise concerns regarding this conclusion by highlighting the possible loopholes in the experimental design and the data analysis procedures. We further suggest auxiliary experiments that can substantiate the authors' claim.

