Related Experiment Video
Updated: Jun 29, 2026
Electrophysiological Measurements and Analysis of Nociception in Human Infants
Published on: December 20, 2011
Evidences for gestures associated with pruritus in very young infants: a pilot study
Adrien Boyard1,2, Camille Cosnard3, David Simon4
1Department of Dermatology and French Expert Center on Pruritus, Brest University Hospital, Brest, France. adrien.boyard@chu-brest.fr.
Insights
Infants with atopic dermatitis (AD) exhibit unique hand movements and immature scratching behaviors, indicating pruritus even before they can fully scratch. These behaviors correlate with AD severity.
Area of Science:
- Pediatrics
- Dermatology
- Ethology
Background:
- Pruritus (itching) has a congenital basis but is often underestimated in infants.
- Atopic dermatitis (AD) is a common condition in infants that causes significant discomfort.
Purpose of the Study:
- To analyze behaviors associated with pruritus in infants under 6 months with atopic dermatitis (AD).
- To identify early indicators of pruritus in infants before developed motor scratching skills.
Main Methods:
- Infants under 6 months were divided into healthy and moderate-to-severe AD groups.
- Video recordings of infants were analyzed by ethologists using scan-sampling.
- Behaviors, including hand movements and self-contact, were quantified.
Main Results:
- Infants with AD showed significantly more frequent hand movements compared to healthy infants.
- Immature scratching behavior (self-contact with grasping) was more prevalent in the AD group.
- This scratching behavior correlated with SCORAD (Severity of Atopic Dermatitis) scores.
Conclusions:
- Infants with AD display distinct behaviors indicative of pruritus.
- These behaviors, identified through video analysis, can serve as early markers of itching in infants.
- This study provides novel insights into pruritus manifestation in early childhood.
Abstract:
The anatomical and functional basis for pruritus is present from birth. However, pruritus in this population is largely underestimated. The aim of this study was to analyze behaviors potentially associated with pruritus in infants under 6 months suffering from atopic dermatitis (AD). Infants under 6 months of age were enrolled in two arms: a healthy group and a group with moderate or severe AD. Infants were videotaped for at least 5 min and videos were analyzed by ethologists using the scan-sampling method. Thirty-four infants aged 2.5-5.5 months were included, 9 healthy infants and 25 infants with AD. Hand movements were more frequent in the AD group than in the healthy infants (p < 0.01). Video analysis revealed the presence of self-contact with grasping movements, which could be identified as immature scratching behavior. The statistical distribution of this behavior was greater in the AD group (p 0.03). Correlation analyses showed that this scratching behavior was associated with SCORAD (p 0.04), but not with age. This is the first study to highlight behaviors that can be identified in infants with pruritus before they develop the motor capacity to scratch.
