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Faculty Experts

Fay Guarraci

Professor of Psychology


Areas of expertise
Drugs of Abuse, Sexual Motivation and Fertility


Post-Doctoral Fellowship,Dartmouth College 2003
PhD,University of Vermont 2000
BA,McGill University 1994


Visting Research Professor
The University of Texas at Ausitn
October 01, 2010 - present

Postdoctoral Fellow
Dartmouth College
June 01, 2000 - July 01, 2003


During the past ten years, I have systematically investigated how drugs of abuse affect sexual motivation in the female rat. Consistent with the literature in humans, my laboratory has found that although most drugs of abuse increase dopamine release in the brain, some drugs of abuse disrupt female sexual behavior (e.g., d-amphetamine) whereas other drugs of abuse enhance sexual behavior (e.g., caffeine, methamphetamine).
    Sexual behavior in the female rat is characterized by both receptive and solicitation behaviors. Receptive behavior is defined by the lordosis posture, which involves the dorsal flexion of the female rat's back in response to a mount by a male rat. Female rats also engage in solicitation behaviors, which include hopping, darting, ear wiggling, and pacing of sexual stimulation 6. These behaviors function to "solicit" the attention of potential mates. If given the opportunity, a sexually receptive female will approach and withdraw from a sexually vigorous male, thereby controlling the timing of the receipt of sexual stimulation (i.e., mounts, intromissions, and ejaculations). This pattern is known as paced mating behavior (PMB). The pacing of sexual stimulation by the female can be observed under natural conditions or studied in the laboratory using a paced mating arena. In a paced mating arena, a sexually receptive female can approach and withdraw from a sexually vigorous male through small holes that only she fits through to mimic how rats mate in their natural habitat.
    Although not commonly used to study animals that are promiscuous, we have recently been able to use a mate choice paradigm to further our understanding of the reinforcing properties of mating behavior in female rats. We have also been able to investigate the potential benefits of sexual motivation on reproductive success (Lovell et al., 2007; Zewail-Foote et al., 2009). For example, female rats spend significantly more time with one male when they are given an opportunity to mate with multiple males simultaneously. In general, a female rat will spend more than twice as much time with a preferred mate than with a non-preferred mate, as well as return quicker to a preferred mate than a non-preferred mate following sexual stimulation. In addition, female rats make more visits to, and receive more sexual stimulations from  a preferred mate than a non-preferred mate.


PUBLISHED MANUSCRIPTS since 2005 (* Denotes Student Co-Author)

Memos, N.K.*, Vela, R.*, Tabone, C.*, & Guarraci, F.A., (2014) Endocannabinoid influence on partner preference in female rats. Pharmacology, Biochemistry and Behavior xx: xxx-xxx.


Guarraci, F.A., Bolton, J.L. (2014) "Sexy Stimulants": The Interaction Between Psychomotor Stimulants and Sexual Behavior in the Female Brain Pharmacology, Biochemistry and Behavior xx: xxx-xxx.


Thibodeau, R.B.*, Ornelas, L.C.*, Romero, J.*, Memos, N.*, Scheible, M.*; Avila, A.*, Schumacher, A.*, Navarro, A.*, Zimmermann, K.*, Cuenod, B.A.*, Frohardt, R.J. & Guarraci, F.A. (2013) Acute withdrawal but not long-term withdrawal from methamphetamine affects sexual behavior in female rats. Pharmacology, Biochemistry and Behavior 103: 701-709.


Bolton, J.L.*, Winland, C.*, Ford, B.*, Burbey, A., Zewail-Foote, M., Guarraci, F.A. (2012) Kin discrimination in prepubescent and adult Long-Evans rats. Behavioral Process .


Winland, C.*, Bolton, J.L.*, Ford, B.*, Jampana, J.*, Tinker, J.*, Frohardt, R.J., Guarraci, F.A., Zewail-Foote, M. (2012) "Nice guys finish last": Influence of mate choice on reproductive success in Long-Evans rats. Physiology & Behavior 105: 868-876.


Meerts, S.H., Guarraci, F.A. , Clark, A.S., (2011) An intact medial preoptic area is necessary for zaprinast to modulate paced mating behavior in female rats. Physiology & Behavior 105: 289-293.


Winland, C.*, Haycox, C.*, Bolton, J.L.*, Jampana, S.*, Oakley, B.J.*, Ford, B.*, Ornelas, L.*, Burbey, A.*, Marquette, A.*, Frohardt, R.J.,F.A. Guarraci (2011) Methamphetamine enhances sexual behavior in female rats. Pharmacology, Biochemistry and Behavior 98: 575-582.


Guarraci, F.A. (2010) "Sex, Drugs and the Brain": The interaction between drugs of abuse and female sexual motivation in the female rat. Hormones and Behavior 58: 138-148.


Clark, A.S., Meerts, S.H., Lang, K.E., Guarraci, F.A. (2009) Zaprinast, a phosphodiesterase type-5 inhibitor, alters paced mating behavior in female rats. Physiology & Behavior 96: 289-293.


Zewail-Foote, M., Diehl, A.*, Benson, A.*Lee, K. and Guarraci, F.A. (2009) Reproductive success and mate choice in Long-Evans rats. Physiology & Behavior 96: 98-103.


Guarraci, F.A., Frohardt, R.J., Hines, D.*, Navaira, E.*, Smith, J.* and Wampler, L.* (2008) Intracranial infusions of amphetamine into the medial preoptic area but not the nucleus accumbens affect paced mating behavior in female rats. Pharmacology, Biochemistry and Behavior 89: 253-262.


Stanzer, M.*, Guarraci, F., Giuliano, T. and Sims, A. (2007) Paramedic or EMT-basic partner: Study evaluates preferred partner types & the effect of partners on work-related stress levels. Journal of Emergency Medical Services 32: 72-74.


Guarraci, F.A. and Clark, A.S. (2006) Ibotenic acid lesions of the medial preoptic area disrupt the expression of partner preference in sexually receptive female rats Brain Research 1076:163-170.


Guarraci, F.A. and Benson, A.* (2005) "Coffee, Tea and Me": Moderate doses of caffeine affect sexual behavior in female rats Pharmacology, Biochemistry and Behavior 82: 522-530.


Seminars & Presentations

Invited Presentations:

Texas Woman's University Biology Colloquium Series 2011

University of Texas, Austin Behavioral Neuroscience Series "The Neurobiology of Female Reproductive Behavior" 2005

University of Texas, Health Science Center San Antonio Pharmacology Seminar Series "Should I Stay or Should I Go: The Neurobiology of Paced Mating Behavior" 2004

Southwestern University, Biology Department "Everything you always wanted to know about sex, rat sex that is". 2009

Invited Panelist:

 BRAINS: Broadening the Representation of Academic Investigators in NeuroScience, a national program to accelerate and improve the career advancement of neuroscience postdoctoral researchers and assistant professors from underrepresented groups University of Washington and NIH 2014

The University of Texas, Austin Graduate Student Assembly Careers in Academia Professional Dev. Week 2013

The University of Texas, Austin Women in Science Journey to Academia Panel Series 2007


Honors & Awards

Sam Taylor Award 2012

Mellon Interdisciplinary Research Award 2009

ACS Faculty Renewal Award 2009

Robert S. Daniel Award, Society for the Teaching of Psychology, Nomination 2008, 2009

Southwestern University Teaching Award 2007

Brown Junior Fellow, Southwestern University 2006-2007

Frank A. Beach Award, Society for Behavioral Neuroendocrinology, Nomination 2006

Young Investigator Award, Southwestern University 2005-2006

Journal of Emergency Medical Services Research Award 2005 co-PI with student Melanie Stanzer $1,500

Society for Neuroscience Lay Research Summary (press release) 2005

Southwestern University Teaching Award Finalist 2005, 2006

Southwestern University Advising Award Finalist 2005

National Science Foundation Major Research Instrumentation 2004-2006 $ 173,000

National Institute of Mental Health Pre-Doctoral Individual National Research Service Award 1996-1999

Ronald Suiter Travel Award 1998

New York Academy of Sciences Junior Investigator Travel Award 1998

University of Vermont Graduate Research Award 1996

Teaching Fellow of the Year 1996-1997, University of Vermont

First Class Honors, McGill University 1994


Specific subjects or issues you can knowledgeably discuss:
hormones, sex, brain, drugs of abuse

I am willing to talk to the media: yes

I am willing to talk to community groups about my area of expertise: no

Can you do interviews in Spanish? no

Other languages you are fluent in:

Experience with the news media (especially electronic media):

Contact Details:
(512) 863-1747(office)
Office: Olin 121