Thionin-stained coronal section through MGB Thionin-stained coronal section through MGB. dMGB, vMGB, and mMGB divisions are demarcated by dotted black lines. Thionin-stained coronal section through MGB. dMGB, vMGB, and mMGB divisions are demarcated by dotted black lines. The gray dashed line represents the horizontal sectioning plane for making acute brain slices containing MGB. Inset represents a recorded MGB neuron that was labeled with neurobiotin and traced using Neurolucida. The red star mark defines the location of the neuron in MGB. Evgeny A. Sametsky et al. J. Neurosci. 2015;35:9369-9380 ©2015 by Society for Neuroscience