Posted: 07.11.2014 | by AMRA
Previous studies have shown that expectant mothers’ anxiety and stress can adversely affect their children’s brain development. If this is so, is it possible that expectant mothers’ levels of mindfulness can have a positive, protective effect on their children’s brain development?
van den Heuvel et al. [Social Cognitive and Affective Neuroscience] tested this possibility by assessing mindfulness (using a short form of the Freiburg Mindfulness Inventory) and anxiety (using a symptom checklist) in 78 expectant mothers during the second trimester of pregnancy. Nine months after their infants were born, the research team assessed the infants’ auditory processing by measuring their brain’s electrical responsiveness to sounds, or “auditory evoked event related potentials” (ERPs) using an electroencephalogram (EEG) to measure this responsiveness.
The infants were presented with series of sounds: a frequently presented tone with a base frequency of 500 vibrations per second interspersed with less frequently presented sounds such as the sound of a door slamming or a dog barking. The researchers analyzed two waveform components of the infants’ brain responses to sounds: a “P150” component (an electrically positive component of an EEG wave occurring at approximately 150 milliseconds after the presentation of a sound) reflecting selective attention to a particular stimulus together with suppression of attention to other stimuli, and an “N250” component (an electrically negative component of an EEG wave occurring at approximately 250 milliseconds after the presentation of a sound) tied to turning one’s attention to a novel stimulus.
Mothers’ mindfulness during pregnancy was associated with significantly larger infant P150 wave amplitudes and significantly smaller infant N250 wave amplitudes. Maternal anxiety during pregnancy was associated with significantly larger infant N250 wave amplitudes. […]