Far left, cartoon of a pyramidal cell showing the approximate location of the basal and apical dendrites, and the cell body. The laminar distribution of dendritic and axonal arbors of different types of interneurons containing calcium-binding proteins and neuropeptides in the hippocampus.
Circles mark the general soma location of each interneuron type.
The lines emanating from them indicate the predominant orientation and laminar distribution of the dendritic tree. Purple boxes represent the laminae where the axon of each interneuron type typically extends its arbor. Turquoise boxes indicate that other interneurons, rather than principal cells, are the primary targets. The transverse extent of the dendrites or axon is not indicated. In such cases, please see the associated PDF file.