CNR1 Gene Variation and Gaze Duration at Happy Faces
Author Information
Author(s): Bhismadev Chakrabarti, Simon Baron-Cohen
Primary Institution: University of Cambridge
Hypothesis
Does variation in the cannabinoid receptor 1 (CNR1) gene influence gaze duration towards happy faces?
Conclusion
CNR1 variations modulate the striatal function that underlies the perception of happy faces.
Supporting Evidence
- Two SNPs in the CNR1 gene were associated with longer gaze duration at happy faces.
- The allelic groups associated with a greater striatal response to happy faces were linked to longer gaze duration.
- Participants were genotyped for SNPs previously linked to striatal response in an fMRI study.
Takeaway
This study found that certain genes can change how long we look at happy faces, which might help us understand social behavior in people with autism.
Methodology
Participants observed emotional expressions while their eye movements were recorded and were genotyped for specific SNPs in the CNR1 gene.
Potential Biases
Potential bias due to the specific demographic of participants (Caucasian ancestry).
Limitations
The small sample size may limit the robustness of the findings.
Participant Demographics
30 volunteers (13 males, 17 females; mean age 24.1 years; all of Caucasian ancestry).
Statistical Information
P-Value
0.011 for rs806377, 0.014 for rs806380
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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