Event Related Potentials in Infants and Adults
|First Received Date ICMJE||July 30, 2004|
|Last Updated Date||December 19, 2012|
|Start Date ICMJE||July 2004|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00088712 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Event Related Potentials in Infants and Adults|
|Official Title ICMJE||Event Related Potentials in Infants and Adults|
This study will explore the development of visual perception and the brain activity that underlies it. It will examine electrical activity in the brain while people are processing characteristics of the visual environment, and how that processing might change with development.
Infants who are within 2 weeks on either side of their 4-month birthday may be eligible for this study. A parent of the child also participates.
Parents who join the study are asked basic questions about their family, such as its size and ethnic make-up, their infant's birth date, complications of pregnancy or delivery, and any health problems of the infant, such as congenital developmental disorders or visual abnormalities.
Each family is seen at the clinic one time for a 45-minute visit. The infant is outfitted with an elastic net containing many small sensors that make contact with the scalp. He or she is then shown pictures on a computer screen. The sensors in the head net are connected to a computer that records the infant's brain activity while the infant watches the pictures on the screen. The head net is moistened with warm water before being applied, and is not uncomfortable to wear. Towels are available throughout the session to dry any excess moisture from the net.
The major objective of this research is to better understand the response of the brain to significant stimulation in early and later development. The proposed work is designed to examine infants' and adults' (especially mothers') responses to salient features of the external environment. To do so, the present research studies the biological bases and behavioral significance of natural preferences and information processing. The primary research strategy to be used consists of analyzing infants' behavioral and brain responses to visual patterns. In a laboratory procedure, infants will explore patterns and their brain electrical activity will be measured simultaneously with an electronic analysis system. In specific, five experiments of visual attention in human infants are proposed. In one experiment, babies are hypothesized to look longer at more saturated colors; in a second experiment, babies are hypothesized to look longer at gratings aligned along the vertical and horizontal orthogonals than along the obliques. Because saturated colors and orthogonal stimulation elicit greater activity in visual system neurons and greater amplitude evoked potentials than desaturated colors or oblique stimulation, respectively, these two experiments explore the hypothesis that the simple visual stimuli to which infants preferably attend are those that are particularly appropriate in stimulating the geniculostriate or primary visual system. In the third experiment, we plan to trace the ontogeny of the mature brain response to whole patterns as opposed to parts of patterns. In a fourth experiment, we intend to compare region-specific activity when the surface features of a familiarized visual target change to that when its location changes. In the fifth experiment, we examine individual differences in the power metrics associated with infants' attention to visual stimuli in relation to individual differences in their corresponding behavior coded by observers. Finally, in experiments with adults we will explore brain responses and their localization in (new) parents and nonparents to pictures of infants (their own versus others) and adults.
|Study Type ICMJE||Observational|
|Study Design ICMJE||Not Provided|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Intervention ICMJE||Not Provided|
|Study Group/Cohort (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Recruiting|
|Estimated Enrollment ICMJE||400|
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
Participants will be selected for inclusion in this study and each to follow on the basis of age, gestational status (i.e., full-term vs. pre-term birth), visual normality, and general health status. Once the recruitment letters have been mailed, a brief screening interview will be conducted with all parents who call to express an interest in participating. These parents will be asked about their infants' birth date, expected due date, and any diagnoses of severe perinatal complications, visual abnormalities, and congenital developmental disorders. The initial group will be recruited to participate within two weeks on either side of their 4-month birthday. Infants with a gestational age of less than 36 weeks, and/or those with histories of severe perinatal complications, visual abnormalities, or congenital developmental disorders, or a family history of color-vision deficiency will not be recruited for participation. Equal numbers of males and females will be recruited to participate.
|Ages||2 Months to 45 Years|
|Accepts Healthy Volunteers||Yes|
|Location Countries ICMJE||United States|
|NCT Number ICMJE||NCT00088712|
|Other Study ID Numbers ICMJE||040250, 04-CH-0250|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Institutes of Health Clinical Center (CC)|
|Verification Date||November 2012|
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