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Hemodynamic responses to visual stimuli in cortex of adults and 3- to 4-year-old children
- Source :
- Brain Research. 1383:242-251
- Publication Year :
- 2011
- Publisher :
- Elsevier, 2011.
-
Abstract
- In this study we used near-infrared spectroscopy (NIRS) to measure relative changes in cortical hemodynamics from 19 adult and 19 preschool children (aged 3–4 years old), while they watched epochs of static and motion pictures extracted from TV programs. The spatio-temporal characteristics of oxygenated and deoxygenated hemoglobin volumes (oxy- and deoxy-Hb) of both subject groups were described and compared where appropriate for five regions of interest (ROIs). These were striate, left and right middle temporal, and left and right temporo-parietal areas. Over these areas, deoxy-Hb volumes did not differ between both groups. Preschool data showed significant increases in oxy-Hb over striate, middle temporal and temporo-parietal areas in response to visual motion stimuli. Static stimuli caused a significant oxy-Hb increase over striate and left middle temporal areas. Surprisingly, changes in adult oxy-Hb were not profound and did not show a significant oxy-Hb increase in striate and middle temporal areas in response to the motion stimuli, warranting further research. In spite of oxy-Hb volume differences, oxy-Hb recovery to baseline followed a similar pattern in both groups in response to both static and motion stimuli. Together, the results suggest that near-infrared spectroscopy is a viable method to investigate cortical development of preschool children by monitoring their hemodynamic response patterns.
- Subjects :
- Adult
Male
medicine.medical_specialty
Visual perception
Haemodynamic response
Vision
media_common.quotation_subject
Hemodynamics
Audiology
Young Adult
Near-infrared spectroscopy
Cortex (anatomy)
Perception
medicine
Humans
Molecular Biology
media_common
Cerebral Cortex
Brain Mapping
Spectroscopy, Near-Infrared
General Neuroscience
Occipital cortex
Visual motion
medicine.anatomical_structure
Visual cortex
El Niño
Preschool child
Cerebrovascular Circulation
Child, Preschool
Female
Neurology (clinical)
Psychology
Neuroscience
Photic Stimulation
Developmental Biology
Subjects
Details
- Language :
- English
- Volume :
- 1383
- Database :
- OpenAIRE
- Journal :
- Brain Research
- Accession number :
- edsair.doi.dedup.....d357e2dcd00a7679c19b0833f329d829