This study focuses on how the body schema develops during the first months of life, by investigating infants’ motor responses to localized vibrotactile stimulation on their limbs. Vibrotactile stimulation was provided by small buzzers that were attached to the infants’ four limbs one at a time. Four age groups were compared cross-sectionally (3-, 4-, 5-, and 6-month-olds). We show that before they actually reach for the buzzer, which, according to previous studies, occurs around 7–8 months of age, infants demonstrate emerging knowledge about their body’s configuration by producing specific movement patterns associated with the stimulated body area. At 3 months, infants responded with an increase in general activity when the buzzer was placed on the body, independently of the vibrator’s location. Differentiated topographical awareness of the body seemed to appear around 5 months, with specific responses resulting from stimulation of the hands emerging first, followed by the differentiation of movement patterns associated with the stimulation of the feet. Qualitative analyses revealed specific movement types reliably associated with each stimulated location by 6 months of age, possibly preparing infants’ ability to actually reach for the vibrating target. We discuss this result in relation to newborns’ ability to learn specific movement patterns through intersensory contingency.
- Talk on Consciousness and Sensorimotor Approach, February 4th 2019
- July 2018 New publication: Francesco Mannella, Vieri G. Santucci, Eszter Somogyi, Lisa Jacquey, Kevin J. O’Regan and Gianluca Baldassarre, “Know Your Body Through Intrinsic Goals”
- June 2018 New publication: Alban Laflaquière, J.Kevin O’Regan, Bruno Gas & Alexander Terekhov, “Discovering space — Grounding spatial topology and metric regularity in a naive agent’s sensorimotor experience”
- May 2018 New publication: Rizza A, Terekhov AV, Montone G, Olivetti-Belardinelli M and O’Regan JK, “Why early tactile speech aids may have failed: no perceptual integration of tactile and auditory signals”
- May 2018 New publication: Jaqueline Fagard, Rana Esseily, Lisa Jacquey, Kevin O’Regan & Eszter Somogyi “Fetal Origin of Sensorimotor Behavior”