Fig. 2.

In the rostrocaudal direction of control goats, there are changes in the anatomy of the LPBN, MPBN, and KFN. A: immunohistochemically stained hemisections for the M2 receptors of a control goat and a schematic illustrating the location of the LPBN, MPBN, and KFN at 7 different rostrocaudal distances from the peak (pKFN) number of neurons in the KFN. B: plots of the number of neurons in the LPBN, MPBN, and KFN of control goats at different rostrocaudal distances relative to the pKFN. Among the 3 subnuclei, note the differences in number of neurons rostrocaudally. Filled symbols indicate unilateral neuron counts from individual goats; open symbols indicate the mean of all control goats.