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  • Title: Maturational changes in the thermoalgesic system in humans from childhood to adulthood revealed by CO(2) laser evoked brain potentials following cutaneous heat stimuli.
    Author: Opsommer E, Plaghki L.
    Journal: Neurosci Lett; 2001 Dec 28; 316(3):137-40. PubMed ID: 11744221.
    Abstract:
    Possible maturational changes in the thermoalgesic system were studied by reaction times (RT) and late (Adelta-fibre) laser evoked potentials (LEPs) following CO(2) laser heat stimulation of the hand in healthy children (n=12) and young adults (n=12). In children (10+/-2 years) LEPs presented a negative-positive complex with maximum amplitude (peak-to-peak 71+/-35 microV) at the vertex and latencies of 248+/-82 and 433+/-104 ms, respectively. As compared to adults (24+/-3 years), children had a significant increased peak-to-peak amplitude (+25.7 microV; P=0.03) although no difference in latencies and topography. Median RT (710 ms) was also significantly increased (+312 ms; P<0.005) in children. A decrease in RT and late LEP amplitude from childhood to adulthood may reflect aspects of maturation in sensory processing of the thermoalgesic system.
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