“…However, treatments with PCPA,-Sy--6,-and -5, , 7-dihydrpxyfryptamine applied to the raphe nuclei and electrolytic lesions of the raphe, all of which should theoretically elicit comparable behavioral outcomes, frequently produce inconsistent results. (See the review in Peters, Anisman, & Pappas, 1978. ) Accordingly, conclusions about the role of 5-HT in subserving locomotor activity must await further research.…”