Graphic: Comparative Brain Anatomy
Caption: This image shows comparative brain anatomy of hearing- and vocalizing-induced ZENK expression in avian vocal learners. Left: partial phylogenetic tree based on Sibley and Ahlquist, with one common species name per order; colors indicate evidence for vocal learning. Red dots, ancestral nodes of possible independent gain of vocal learning; green dots, ancestral nodes of possible loss of vocal learning. Parrots are the oldest vocal learning order, oscine songbirds the most recent. Right: semi three-dimensional brain renditions of vocal learners. Blue, hearing-induced regions; red, similarly positioned vocalizing-induced regions; yellow, differently positioned vocalizing-induced regions.
Source: Jarvis, et al., Nature, vol. 406, 10 August, 2000. p. 631
Web source: http://jarvis.neuro.duke.edu/structure/index.html
NSF Funded: yes
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