FMR1 CGG Repeats and Stress Influence Self-Reported Cognitive Functioning in Mothers.
Nell Maltman, Leann Smith DaWalt, Jinkuk Hong and 4 others
PMID 36548377WHAT IT FOUND
Mothers of children with disabilities and those facing recent life events reported more executive function and memory difficulties.
These stress effects were independent of FMR1 CGG repeat length. Clinicians should address maternal cognitive load regardless of genetic status.
Key findings
01Parenting a child with a developmental disability significantly predicted greater self-reported executive function difficulties and memory problems.
02The number of life events experienced in the past year significantly predicted higher executive function problems and self-reported memory issues.
03FMR1 CGG repeat length had a curvilinear effect on cognition but did not interact with stress; genetic and environmental factors influenced cognitive functioning independently.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
Cognitive functioning was measured solely by self-report, with no direct assessment or neurological exam to verify difficulties. The sample was racially and ethnically homogeneous, with 99.0% of mothers identifying as White. The study included only mothers, so findings cannot be generalized to fathers or individuals without children. Researchers did not have FMR1 activation ratio data, which limits the understanding of how gene expression relates to the observed cognitive effects.
The easy way to misread this
Do not attribute the cognitive difficulties in this group solely to the stress of parenting a child with a disability. The study found that FMR1 CGG repeat length independently predicted executive function and memory problems, meaning genetic variation plays a distinct role alongside environmental stressors.