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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: Int J Dev Neurosci. 2012 Dec 3;31(6):415–423. doi: 10.1016/j.ijdevneu.2012.11.009

Figure 1.

Figure 1

Laminar organization and circuit diagram for the olfactory bulb. A, a cartoon summary of the key synaptic connections in the main olfactory bulb based on studies in mice. Olfactory receptor neuronal axons terminate in the glomerular layer where they form axo- and dendro-dendritic connections with both the mitral and tufted cells and inhibitory periglomerular layer interneurons. The mitral/tufted cells are the primary output cells and their axons project to other cortical regions. The transmission of odorant sensory information for higher level processing in the cortex is modulated by inhibitory neurons in the granule cell layer. B, a cartoon of the mouse forebrain showing the position of the individual laminae of the main olfactory bulb (OB), rostral migratory stream (RMS) and subventricular zone (SVZ).