Animals 2 Basal ganglia 2 Corpus Striatum 2 Critical Period (Psychology) 2 Critical period 2 D1 receptor 2 D2 receptor 2 Dopamine 2 Gene Expression Regulation 2 Male 2 Motor Activity 2 Motor plasticity 2 Motor systems and sensorimotor integration 2 Rat striatum 2 Rats 2 Rats, Sprague-Dawley 2 Receptors, Dopamine D1 2 Receptors, Dopamine D2 2 animal experiment 2 animal tissue 2 article 2 binding site 2 circling behavior 2 controlled study 2 corpus striatum 2 dopamine 1 receptor 2 dopamine 2 receptor 2 isoprotein 2 learning 2 male 2