1. Behavioral tolerance to the force differentiation effects of diazepam and midazolam in rats

   • S. E. Bowen
   • S. C. Fowler
   • M. J. Kallman

   Original Investigation Pages: 327 - 335

2. Modification of behavioral effects of drugs in mice by neuroactive steroids

   • J. T. Ungard
   • M. Beekman
   • J. M. Witkin

   Original Investigation Pages: 336 - 343

3. Ipsapirone challenge in aggressive men shows an inverse correlation between 5-HT_1A receptor function and aggression

   • A. J. Cleare
   • A. J. Bond

   Original Investigation Pages: 344 - 349

4. Fluphenazine levels during maintenance treatment of recent-onset schizophrenia: relation to side effects, psychosocial function and depression

   • M. J. Gitlin
   • K. H. Nuechterlein
   • M. Aravagiri

   Original Investigation Pages: 350 - 354

5. Differential effects of dopamine receptor subtype blockade on performance of rats in a reaction-time paradigm

   • A. D. Smith
   • D. L. Smith
   • G. F. Koob

   Original Investigation Pages: 355 - 360

6. Double blind study of tiapride versus haloperidol and placebo in agitation and aggressiveness in elderly patients with cognitive impairment

   • H. Allain
   • P. H. J. Dautzenberg
   • D. Gérard

   Original Investigation Pages: 361 - 366

7. Motor stimulation following bilateral injection of the group-I metabotropic glutamate receptor agonist into the dorsal striatum of rats: evidence against dependence on ionotropic glutamate receptors

   • L. Mao
   • J. Q. Wang

   Original Investigation Pages: 367 - 373

8. Effects of buprenorphine versus buprenorphine/naloxone tablets in non-dependent opioid abusers

   • E. C. Strain
   • K. Stoller
   • G. E. Bigelow

   Original Investigation Pages: 374 - 383

9. Associative and non-associative fentanyl tolerance in the rat: evaluation of cross tolerance with mu-and kappa-specific opioids

   • B. L. Carter
   • S. T. Tiffany
   • C. A. Conklin

   Original Investigation Pages: 384 - 392

10. Methoclocinnamox: time course of changes in alfentanil-reinforced responding in rhesus monkeys

    • R. J. Briscoe
    • G. Winger
    • J. H. Woods

    Original Investigation Pages: 393 - 399

11. High 5HT_2A receptor occupancy in M100907-treated schizophrenic patients

    • M. Talvik-Lotfi
    • S. Nyberg
    • L. Farde

    Original Investigation Pages: 400 - 403

12. The loudness dependency of the auditory evoked N1/P2-component as a predictor of the acute SSRI response in depression

    • J. Gallinat
    • R. Bottlender
    • U. Hegerl

    Original Investigation Pages: 404 - 411

13. Reductions in ethanol, phencyclidine, and food-maintained behavior by naltrexone pretreatment in monkeys is enhanced by open economic conditions

    • M. E. Carroll
    • K. P. Cosgrove
    • J. L. Mickelberg

    Original Investigation Pages: 412 - 422

14. Attenuation of specific PCP-evoked behaviors by the potent mGlu2/3 receptor agonist, LY379268 and comparison with the atypical antipsychotic, clozapine

    • J. Cartmell
    • J. A. Monn
    • D. D. Schoepp

    Original Investigation Pages: 423 - 429

15. Pharmacological characterization of the nociceptin receptor mediating hyperphagia: identification of a selective antagonist

    • C. Polidori
    • G. Calo’
    • M. Massi

    Original Investigation Pages: 430 - 437

16. The serotonin-1A receptor antagonist WAY-100635 modifies fluoxetine’s antidepressant-like profile on the differential reinforcement of low rates 72-s schedule in rats

    • M. S. Cousins
    • L. S. Seiden

    Original Investigation Pages: 438 - 442