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Notes de cours CM Psychophysiologie L1
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Notes de cours CM Psychophysiologie L1 concernant les principaux sens étudiés par notre encéphale.
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Psychopsy (3)L’audition
Le son
● Onde = Succession de compressions et de décompressions
Oreille externe :
Pavillon, ,conduit,
Oreille Moyenne :
Tympan
Osselets : (vibrent en même temps que tympan)
-Marteau
- Enclume
- Étrier (fait vibrer liquide à l’intérieur de la cochlée)
- Les sons les + graves se propagent le plus
loin (récepteurs graves au bout de la cochlée)
- Toutes ces cellules ciliées sont reliées au
cerveau par le nerf auditif
- Son transmis jusqu’au Thalamus, puis Cortex
auditif
1
, Psychopsy (3)
● Aire auditive primaire = entendre son
● Aire auditive secondaire = comprendre son (Aire associative)
● On capte stéréo car le son met plus de temps pour arriver à la seconde oreille, donc le cerveau capte
cette différence et on peut en déduire la localisat° du son.
La Somesthésie
Sensibilité extéroceptive
● Sensibilité au milieu extérieur par des
récepteurs sensoriels de la surface du corps
Proprioception
(ligaments, os,...)
● Sensibilité à moi-même
● Extrêmement importante pour savoir
position dans l’espace :
○ 10% aux yeux,
○ 20% oreilles,
○ 70% Proprioception
Les réseaux neuronaux de la somesthésie : remontent jusqu’au THALAMUS
2
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