Fig. 5.
5-HT induced PAD which is TTX and Mn2+ resistant. (A) Illustrates the action of bath applied 5-HT (100 µM) as recorded from the dorsal root of a sucrose gapped hemisected spinal cord pretreated with 1 µM TTX. The superfusate was then switched to a solution containing 1 µM TTX and 2 mM MnCl2. After exposure to this solution for 40 min, the response to 5-HT (100 µM) was again determined and is shown in (B).