Changes

was positioned on the midline 3.2 mm caudal to lambda and 7.2 mm below the skull surface (stereotaxic coordinates  

was positioned on the midline 3.2 mm caudal to lambda and 7.2 mm below the skull surface (stereotaxic coordinates  

taken from (Baird et al. 2009 PMID 19008313)). Guide cannulas were held in place with dental acrylic bonded to stainless  

taken from (Baird et al. 2009 PMID 19008313)). Guide cannulas were held in place with dental acrylic bonded to stainless  

steel screws anchored to the skull. A 26-gauge obdurator extending 1.0 mm beyond the guide

steel screws anchored to the skull. A 28-gauge obdurator extending 1.0 mm beyond the guide

cannula was inserted into each guide cannula and remained in place except during injections when it was removed and  

cannula was inserted into each guide cannula and remained in place except during injections when it was removed and  

replaced with a 26-gauge injector that extended 1.0 mm beyond the tip of the guide cannula.

replaced with a 28-gauge injector that extended 1.0 mm beyond the tip of the guide cannula.

===Test===

===Test===