Fig. 6.

Gradual loss of syntax with imprinted transitions. (a) Left panel: average synaptic weights for the feed-forward connections from the final pool of each synfire chain (SFC_A-SFC_D) to the initial pools of all chains (SFC_A, blue; SFC_B, red; SFC_C, cyan; SFC_D, yellow). The auditory feedback is suppressed at t _df = 4,000 s and restored at 8,000 s (vertical black lines). Right panel: connections that are potentiated before auditory feedback is suppressed are highlighted by broader arrows and bold letters. (b) Sequencing stereotype (S _⋆, red dots) and average transition entropy (\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\hat{H}$\end{document}, black dots) evaluated in bins of 100 s. The red curve shows a power law fit to the data during auditory feedback suppression