1. Action of intravenously administered talipexole on the rat striatal neurons receiving excitatory input from nigral dopamine neurons

   • H. Matsubayashi
   • T. Amano
   • M. Sasa

   Original Investigation Pages: 369 - 375

2. Post-synaptic 5-HT_1A receptor involvement in yawning and penile erections induced by apomorphine, physostigmine and mCPP in rats

   • P. Protais
   • M. Windsor
   • E. Comoy

   Original Investigation Pages: 376 - 383

3. Complex stimulus properties of LSD: a drug discrimination study with α₂-adrenoceptor agonists and antagonists

   • D. Marona-Lewicka
   • D. E. Nichols

   Original Investigation Pages: 384 - 391

4. The effects of the kappa agonist U-50,488 on cocaine-induced conditioned and unconditioned behaviors and Fos immunoreactivity

   • C. A. Crawford
   • S. A. McDougall
   • S. P. Berger

   Original Investigation Pages: 392 - 399

5. Opposite role of CCK_A and CCK_B receptors in the modulation of endogenous enkephalin antidepressant-like effects

   • C. Smadja
   • R. Maldonado
   • B. P. Roques

   Original Investigation Pages: 400 - 408

6. Ondansetron improves cognitive performance in the Morris water maze spatial navigation task

   • D. J. Fontana
   • S. E. Daniels
   • E. H. F. Wong

   Original Investigation Pages: 409 - 417

7. Naltrexone, smoking behaviour and cigarette withdrawal

   • G. Sutherland
   • J. A. Stapleton
   • C. Feyerabend

   Original Investigation Pages: 418 - 425

8. Cognitive and EEG recovery following bolus intravenous administration of anesthetic agents

   • S. La Marca
   • R. J. Lozito
   • R. W. Dunn

   Original Investigation Pages: 426 - 432

9. Presynaptic dopamine-glutamate interactions in the nucleus accumbens regulate sensorimotor gating

   • F. J. Wan
   • M. A. Geyer
   • N. R. Swerdlow

   Original Investigation Pages: 433 - 441

10. Lack of involvement ofδ-opioid receptors in mediating the rewarding effects of cocaine

    • T. J. de Vries
    • D. Babovic-Vuksanovic
    • T. S. Shippenberg

    Original Investigation Pages: 442 - 448

11. Effects of flumazenil on recovery sleep and hormonal secretion after sleep deprivation in male controls

    • E. Seifritz
    • U. Hemmeter
    • E. Holsboer-Trachsler

    Original Investigation Pages: 449 - 456

12. Overnight caffeine abstinence and negative reinforcement of preference for caffeine-containing drinks

    • P. J. Rogers
    • N. J. Richardson
    • N. A. Elliman

    Original Investigation Pages: 457 - 462

13. Kynurenic acid and 5,7-dichlorokynurenic acids improve social and object recognition in male rats

    • Z. Hliňák
    • I. Krejči

    Original Investigation Pages: 463 - 469

14. Effects of microinjections of μ and κ receptor agonists into the dorsal periaqueductal gray of rats submitted to the plus maze test

    • V. Motta
    • K. Penha
    • M. L. Brandão

    Original Investigation Pages: 470 - 474

15. Haloperidol prevents ethanol-stimulated locomotor activity but fails to block sensitization

    • J. Broadbent
    • N. J. Grahame
    • C. L. Cunningham

    Original Investigation Pages: 475 - 482

16. Comparative pharmacology of nicotine and ABT-418, a new nicotinic agonist

    • M. I. Damaj
    • K. R. Creasy
    • B. R. Martin

    Original Investigation Pages: 483 - 490

17. Mianserin as a discriminative stimulus in rats: asymmetrical cross-generalization with scopolamine

    • B. M. Kelley
    • J. H. Porter
    • S. A. Varvel

    Rapid Communication Pages: 491 - 493