Fig. 7.

Several morphological types of interneurons mediate feedforward thalamocortical inhibition. Computer-assisted reconstructions of 14 biocytin-filled neurons, with cell bodies and dendritic trees in blue and axonal arborizations inred. Dendrites and axons are represented with lines of constant width. Laminar boundaries are indicated by thin green lines and labeled with roman numerals on theright. For ease of comparison, tracing sizes were adjusted to the same apparent vertical extent of layer IV, so the scale bar varies slightly between panels but is ∼200 μm. See Results for descriptions of the five morphological types.