Figure 4.

Per section estimates of serotonin (5-HT) neurons identified by immunolabeling for TPH showed BTBR mice have an increased number of neurons in the MR (P = 0.01) and caudal third of the DR, both ventrally and dorsally in the areas also known as B6 (P = 0.0003 for caudal ventral and p = 0.01 for caudal dorsal). N = 6 per group.