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Rebecca Knickmeyer, Ph.D.

Assistant Professor

Knickmeyer

Email:  rebecca_knickmeyer@med.unc.edu

Phone:  (919) 966-2216

Fax:  (919) 966-8994

 

Education:

B.A., Goucher College

Ph.D., University of Cambridge

Postdoctoral Training: The Neurodevelopmental Disorders Research Center and Department of Psychiatry, UNC-Chapel Hill

 

Summary Statement:

Dr. Knickmeyer's research is focused on understanding the mechanisms which modulate the differential vulnerability to and expression of neurodevelopmental disorders in each sex, with a particular focus on hormonal and genetic factors.  She is currently using magnetic resonance imaging (MRI) to explore the sexual differentiation of the brain in human children and in non-human primates.  She is also studying early brain development in children with sex chromosome abnormalities, such as Turner Syndrome, and the effects of prenatal exposure to antidepressant medications on early brain development.

 

Representative Publications:

Peer Reviewed Research Articles

  1. Lutchmaya, S., Baron-Cohen, S., Raggatt, P., Knickmeyer, R., & Manning, J. (2004) 2nd to 4rth digit ratios: Fetal testosterone and estradiol. Early Human Development. 77(1-2):23-28.
  2. Knickmeyer, R.C., Wheelwright, S., Taylor, K., Raggatt, P., Hackett, G., & Baron-Cohen, S. (2005) Gender-typed play and amniotic testosterone. Developmental Psychology 41(3):517-528.
  3. Knickmeyer, R.C., Baron-Cohen, S., Raggatt, P., & Taylor, K. (2005) Foetal testosterone, social relationships and restricted interests in children. Journal of Child Psychology and Psychiatry and Allied Disciplines. 46(2):198-210.
  4. Auyeung, B., Baron-Cohen, S., Chapman, E., Knickmeyer, R., Taylor, K., & Hackett, G. (2006). Foetal testosterone and the Child Systemizing Quotient (SQ-C). The European Journal of Endocrinology. 155:S123-S130.
  5. Baron-Cohen, S., Hoekstra, R., Knickmeyer, R., & Wheelwright, S. (2006). The Autism Spectrum Quotient (AQ) – Children’s version. Journal of Autism and Developmental Disorders. 36(3):343-350.
  6. Chapman, E., Baron-Cohen, S., Auyeung, B., Knickmeyer, R., Taylor, K., & Hackett, G. (2006). Fetal Testosterone and Empathy: Evidence from the Empathy Quotient (EQ) and the ‘Reading the Mind in The Eyes’ Test. Journal of Social Neuroscience. 1, 135-148.
  7. Knickmeyer, R.C., Hoekstra, R., Wheelwright, S., & Baron-Cohen, S. (2006) Age of menarche in females with autism spectrum conditions. Developmental Medicine and Child Neurology. 48:1007-1008.
  8. Knickmeyer, R., Taylor, K., Raggatt, P., Hackett, G., & Baron-Cohen, S. (2006) Fetal testosterone and empathy. Hormones and Behavior. 49 (3):282-292.
  9. Knickmeyer, R.C., Baron-Cohen, S., Fane, B.A., Wheelwright, S., Mathews, G., Conway, G.S. Brook, C.D.G., & Hines, M. (2006). Androgens and autistic traits: A study of individuals with Congenital Adrenal Hyperplasia . Hormones and Behavior. 50(1):148-153.
  10. Gilmore, G.H., Lin, W., Prastawa, M.W., Looney, C.B., Vetsa, Y.S.K., Knickmeyer, R.C., Evans, D., Smith, J.K., Hamer, R.M., Lieberman, J.A., & Gerig, G. (2007). Cerebral Asymmetry, Sexual Dimorphism, and Regional Gray Matter Growth in the Neonatal Brain. Journal of Neuroscience. 27: 1255-1260.
  11. Styner, M., Knickmeyer, R., Joshi, S., Coe, C., Short, S.J., & Gilmore, J. (2007) Automatic brain segmentation in rhesus monkeys. SPIE Medical Imaging Conference Proceedings. 6512, 65122L-1-65122L-8.
  12. Ingudomnukul, E., Wheelwright, S., Baron-Cohen, S. & Knickmeyer, R.C. (2007). Elevated rates of testosterone-related disorders in women with autism spectrum conditions. Hormones and Behavior. 51(5): 597-604.
  13. Knickmeyer, R.C., Wheelwright, S., & Baron-Cohen, S. (2008) Gender-typical play: testing for masculinization/ defeminization in girls with an autism spectrum condition. Journal of Autism and Developmental Disorders. 38(6): 1028-1035.
  14. Knickmeyer, R.C., Gouttard, S., Lin, W., Evans, D., Wilber, K., Smith, K.J., Kang, C., Hamer, R.M., Gerig, G., & Gilmore, J.H. (2008) A Structural MRI Study of Human Brain Development from Birth to 2 Years. Journal of Neuroscience. 28(47):12176-12182.
  15. Auyeung, B., Baron-Cohen, S., Ashwin, E., Knickmeyer, R., Taylor, K., & Hackett, G. (2009). Fetal testosterone and autistic traits. British Journal of Psychology. 100: 1-22.
  16. Auyeung, B., Baron-Cohen, S., Ashwin, E., Knickmeyer, R.C., Taylor, K., Hackett, G., & Hines, M. (in press). Fetal Testosterone Predicts Sexually Differentiated Childhood Behavior in Girls and in Boys. Psychological Science.

Editorials

  1. Baron-Cohen, S., Knickmeyer, R.C., & Belmonte, M. (2006). Genetic research into autism – Response. Science. 311(5763):952.
  2. Knickmeyer, R.C., Baron-Cohen, S., Auyeung, B. & Ashwin, E. (2008) How to test the Extreme Male Brain theory of autism in terms of foetal androgens? Journal of Autism and Developmental Disorders. 38 (5): 995-996.
  3. Baron-Cohen, S., Auyeung, B., Ashwin, E., & Knickmeyer, R. (2009). Fetal testosterone and
    autistic traits: A response to three fascinating commentaries. 100: 39-47.

Reviews

  1. Baron-Cohen, S., Knickmeyer, R.C., & Belmonte, M. (2005) Sex differences in the brain: Implications for explaining autism. Science 310(5749): 819-823.
  2. Knickmeyer, R.C. & Baron-Cohen, S. (2006). Fetal testosterone and sex differences. Early Human Development. 82:755-760.
  3. Knickmeyer, R.C., & Baron-Cohen, S. (2006). Fetal testosterone and sex differences in typical social development and in autism. Journal of Child Neurology. 21:825-845.

Books and Book Chapters

  1. Baron-Cohen, S., Lutchmaya, S., & Knickmeyer, R. (2004) Prenatal Testosterone in Mind: Amniotic Fluid Studies. MIT Press.

 
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