| Autor: |
Pomerleau-Malcuit, Andrée, Malcuit, Gérard, Clifton, Rachel Keen |
| Předmět: |
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| Zdroj: |
Psychophysiology; Sep1975, Vol. 12 Issue 5, p527-535, 9p |
| Abstrakt: |
Cardiac and behavioral reactivity of the human newborn to facial stimulation eliciting approach and escape responses were compared in order to test the distinction between cardiac orienting and defensive reactions. Each infant received 8 trials each of cheek stimulation (stroking near the mouth) and ear stimulation (pinch on the ear lobe). HR responses to both tactile stimuli were accelerations of different amplitude when motor responses were also present. When no overt behavioral response was observed, stroking on the cheek elicited cardiac deceleration while ear stimulation again elicited acceleration. Thus, cardiac orienting was demonstrated in newborns when a rooting stimulus was presented that did not elicit overt head turning. The HR response to ear stimulation on trials unaccompanied by observed movements was a larger acceleration than to cheek stimulation when movement was present. This finding suggests that movement itself does not produce the observed HR increase, but rather that central processing of the signal value of the stimulus determines both overt and cardiac responding. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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