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Related Experiment Videos

Sex, beauty and the orbitofrontal cortex.

Alumit Ishai1

  • 1Institute of Neuroradiology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland. ishai@hifo.unizh.ch

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology
|June 9, 2006
PubMed
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The medial orbitofrontal cortex (OFC) shows differential activation to sexually preferred faces. This brain region processes the value of attractive faces, influenced by individual sexual orientation and stimulus gender.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Social Neuroscience

Background:

  • Face perception involves a complex neural network in the brain.
  • Factors like attention, memory, and emotion influence neural responses to faces.
  • The impact of gender and sexual orientation on face perception remains largely unexplored.

Purpose of the Study:

  • To investigate whether individuals show heightened neural responses to faces aligning with their sexual preference.
  • To explore the influence of gender and sexual orientation on brain activation during facial attractiveness assessment.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to scan 40 heterosexual and homosexual men and women.
  • Participants assessed the attractiveness of male and female faces.

Related Experiment Videos

  • Behavioral ratings of attractiveness were collected alongside neural activation data.

    • Main Results:

    • Behaviorally, all participants rated face attractiveness similarly, irrespective of their gender and sexual orientation.
    • A significant interaction was observed in the medial orbitofrontal cortex (OFC) involving stimulus gender, attractiveness, and participant sexual preference.
    • Specific patterns of OFC activation were found: heterosexual women and homosexual men responded more strongly to attractive male faces, while heterosexual men and homosexual women responded more strongly to attractive female faces.

    Conclusions:

    • The medial orbitofrontal cortex (OFC) appears to encode the subjective value of sexually relevant faces.
    • This neural representation in the OFC is modulated by an individual's sexual preference and the gender of the face.
    • These findings suggest the OFC's role in processing salient, sexually relevant visual information, independent of reproductive fitness considerations.