1. Behavioral screening for cognition enhancers: from indiscriminate to valid testing: Part II

   • Martin Sarter
   • Jim Hagan
   • Paul Dudchenko

   Review Pages: 461 - 473

2. Flesinoxan shows antidepressant activity in a DRL 72-s screen

   • A. van Hest
   • M. van Drimmelen
   • B. Olivier

   Original Investigations Pages: 474 - 479

3. Rebound insomnia and hypnotic self administration

   • Timothy Roehrs
   • Lori Merlotti
   • Thomas Roth

   Original Investigations Pages: 480 - 484

4. Effects of oral BMY 21502 on Morris water task performance in 16–18 month old F-344 rats

   • Mark D. Lindner
   • Valentin K. Gribkoff

   Original Investigations Pages: 485 - 488

5. Chronic treatment with 1-aminocyclopropanecarboxylic acid desensitizes behavioral responses to compounds acting at the N-methyl-d-aspartate receptor complex

   • Phil Skolnick
   • Rachel Miller
   • Ramon Trullas

   Original Investigations Pages: 489 - 496

6. A comparison of various antidepressant drugs demonstrates rapid desensitisation of α₂-adrenoceptors exclusively by sibutramine hydrochloride

   • David J. Heal
   • Michael R. Prow
   • W. Roger Buckett

   Original Investigations Pages: 497 - 502

7. Early dyskinesia — vulnerability

   • Jonathan O. Cole
   • George Gardos
   • Patricia Moore

   Original Investigations Pages: 503 - 510

8. Acute and chronic ethanol tolerance: operant behaviour in naive and ethanol tolerant rats

   • Arto J. Hiltunen
   • Torbjörn U. C. Järbe

   Original Investigations Pages: 511 - 516

9. Conditioned morphine withdrawal in the hamster

   • Paul Schnur

   Original Investigations Pages: 517 - 522

10. Conditioned responses to cocaine-related stimuli in cocaine abuse patients

    • Ronald N. Ehrman
    • Steven J. Robbins
    • Charles P. O'Brien

    Original Investigations Pages: 523 - 529

11. Effects of systemic and intracerebroventricular administration of mecamylamine, a nicotinic cholinergic antagonist, on spatial memory in rats

    • Michael W. Decker
    • Mark J. Majchrzak

    Original Investigations Pages: 530 - 534

12. Effects of alprazolam and imipramine on parasympathetic cardiac control in patients with generalized anxiety disorder

    • Daniel R. McLeod
    • Rudolf Hoehn-Saric
    • Wesley D. Zimmerli

    Original Investigations Pages: 535 - 540

13. Disruptive effects of muscimol infused into the basal forebrain on conditional discrimination and visual attention: differential interactions with cholinergic mechanisms

    • Janice L. Muir
    • Trevor W. Robbins
    • Barry J. Everitt

    Original Investigations Pages: 541 - 550

14. Alcohol and “bursts” of aggressive behavior: ethological analysis of individual differences in rats

    • Klaus A. Miczek
    • Elise M. Weerts
    • Thomas M. Vatne

    Original Investigations Pages: 551 - 563

15. Differences in response to the aversive properties and activity effects of low dose ethanol in LAS and HAS selectively bred rats

    • Martin D. Schechter
    • Edward C. Krimmer

    Original Investigations Pages: 564 - 568

16. Effects of trazodone on EEG sleep and clinical state in major depression

    • A. L. van Bemmel
    • R. G. Havermans
    • R. van Diest

    Original Investigations Pages: 569 - 574

17. Clonidine and yohimbine modulate the effects of naloxone on novelty-induced hypoalgesia

    • Joseph Rochford
    • Patricia Dawes

    Original Investigations Pages: 575 - 580

18. Morphine,d-Pen²,d-Pen⁵ enkephalin and U50,488H differentially affect the locomotor activity and behaviours induced by quinpirole in guinea-pigs

    • Paul J. Brent
    • George Bot

    Original Investigations Pages: 581 - 590

19. Effect of chronic treatment with dizocilpine (MK-801) on the behavioral response to dopamine receptor agonists in the rat

    • Rossella Dall'Olio
    • Ottavio Gandolfi
    • Nicola Montanaro

    Original Investigations Pages: 591 - 594

20. Role of sodium cromoglycate on analgesia, locomotor activity and opiate withdrawal in mice

    • Juan-Carlos Leza
    • Ignacio Lizasoain
    • Pedro Lorenzo

    Original Investigations Pages: 595 - 600