1. The influence of single and chronic morphine administration on some central effects of amphetamine and apomorphine

   • Yu. P. Vedernikov

   Original Investigations Pages: 283 - 288

2. Effect of hippocampal and neocortical ablation on scopolamine-induced activity in the rat

   • Carol V. H. Clark

   Original Investigations Pages: 289 - 301

3. Electroencephalographic and behavioral effects of harmaline in intact cats and in cats with chronic mesencephalic transection

   • J. Villablanca
   • F. Riobó

   Original Investigations Pages: 302 - 313

4. Reduction of the antinociceptive effect of 5-hydroxytryptophan in morphine tolerant rats

   • E. Contreras
   • L. Tamayo
   • P. Weitzman

   Original Investigations Pages: 314 - 319

5. Role of brain amines in the analgesic action of meperidine hydrochloride

   • Vimala H. Sethy
   • Ratan J. Pradhan
   • U. K. Sheth

   Original Investigations Pages: 320 - 326

6. The effects of morphine-like compounds on the light responses of the brine shrimp Artemia salina

   • Judith A. Richter
   • Avram Goldstein

   Original Investigations Pages: 327 - 337

7. The physician questionnaire: A useful tool in psychiatric drug research

   • Karl Rickels
   • Kay Howard

   Original Investigations Pages: 338 - 344

8. The effect of intrahypothalamic microinjection of hemicholinium (HC-3) on the hippocampal theta rhythm of cats

   • Matthew J. Friedman
   • Abraham Wikler

   Original Investigations Pages: 345 - 353

9. Δ¹-Tetrahydrocannabinol, synhexyl and marijuana extract administered orally in man: Catecholamine excretion, plasma cortisol levels and platelet serotonin content

   • Leo E. Hollister
   • Frances Moore
   • Ernest Noble

   Original Investigations Pages: 354 - 360