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. Author manuscript; available in PMC: 2016 Aug 1.
Published in final edited form as: Curr Opin Neurobiol. 2015 Jul 17;33:188–196. doi: 10.1016/j.conb.2015.06.011

Figure 1.

Figure 1

Learning-related decrease of behavior variability and crystallization of action sequences depends on striatal NMDA receptors. (A–B) Behavioral microstructure during the first day (A) and last day (B) of self-paced fixed-ratio eight (FR8) sequence training. (C–D) Behavioral microstructure of a striatal NMDA-KO mouse during the first day (C) and last day (D) of self-paced FR8 sequence training. (E–H) Variability of sequence length (E), sequence duration (F), inter-sequence interval (G) and within-sequence press rate (H), measured as coefficient of variation (CV), in control (black) and striatal NMDA-KO mice (red) during training. Adapted from Jin and Costa (2010).