DEMO

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EN_90085757_0075
Stock pictures
PHOTO: EAST NEWS/BSIP Activation et inhibition de la douleur. Repr??sentation du circuit d'activation (?. gauche) de la douleur et de l'inhibition (?. droite). - Activation : sous l'effet de stimulus nociceptif (blessure, br??lure, inflammation), l'influx nerveux est transmis lentement par les fibres nerveuses au neurone convergent de la moelle ??piniA?re, puis au tronc c??r??bral, ?. l'hypothalamus, thalamus et cortex pour les facteurs congnitifs, directement du tronc c??r??bral au cortex pour les facteurs sensoriels. - Inhibition par stimulus sensoriel tactile au niveau de la peau qui transmet l'influx nerveux au neurone convergent de la moelle ??piniA?re plus rapidement. Ainsi l'information courcircuite celle des sensations douloureuses, et atteint le tronc c??r??bral pour se diffuser dans le cerveau. La sensation de douleur est inhib??e. Pain activation and inhibition. Illustration of the circuit of pain activation (left) and inhibition (right). - Activation: through the effects of a nociceptive stimulus (wound, burn, inflammation, etc.), a nerve impulse is slowly transmitted by the nerve fibers to the spinal wide dynamic range neurons, then to the brain stem, through the hypothalamus, thalamus and cortex, for cognitive factors, or directly to the brain stem, for sensory factors. - Inhibition by sensory tactile stimulus by the skin, which transmits the nerve impulse to the spinal wide dynamic range neurons more quickly. In this way, the information shortcircuits the pain sensations and reaches the brain stem, spreading throughout the brain. Pain is inhibited.
Stock pictures
2009-12-13
EAST NEWS
BSIP
JACOPIN
1166905
1,57MB
21cm x 28cm przy 300dpi
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