Magnetoencephalography in neonatology.
L Lauronen1, P Nevalainen, E Pihko
1Department of Clinical Neurophysiology, Hospital for Children and Adolescents, HUS, Helsinki, Finland. Leena.Lauronen@hus.fi
Neurophysiologie Clinique = Clinical Neurophysiology
|December 28, 2011
Summary
Magnetoencephalography (MEG) reveals insights into neonatal brain function, showing distinct somatosensory responses and potential immaturities in very premature infants. This noninvasive technique aids understanding of developing brain processing and its disruptions.
Area of Science:
- Neuroscience
- Developmental Neuroscience
- Medical Imaging
Background:
- Magnetoencephalography (MEG) offers high temporal and spatial resolution for studying brain activity.
- MEG has increasingly provided novel information on neonatal brain functioning over the past decade.
Purpose of the Study:
- To review findings on spontaneous and evoked brain activity in neonates using MEG.
- To highlight the utility of MEG in understanding neonatal brain development and disturbances.
Main Methods:
- Analysis of spontaneous magnetoencephalogram recordings.
- Evoked response studies using somatosensory, auditory, and visual stimulation.
- Source modeling to assess cortical activation patterns.
Main Results:
- Neonatal upper limb stimulation evokes responses in primary (S(I)) and secondary (S(II)) somatosensory cortices.
- Early cortical responses in neonates suggest immature functioning compared to adults.
- S(II) responses remain prominent in neonatal sleep, unlike in adults.
- Alterations in somatosensory responses were observed in very prematurely-born infants.
Conclusions:
- MEG is a valuable noninvasive tool for investigating neonatal brain activity and development.
- Findings suggest unique patterns of cortical processing and maturation in the neonatal period.
- MEG can detect alterations in brain processing in vulnerable infant populations, such as those born prematurely.
