10 Voies de conduction visuelle Flashcards

1
Q

voie à combien de neuronnes, chacun ou?

A
  • 3 neuronnes

1 bipol 2 multipol 3 corps genouillé lat dans le diencephale

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2
Q

2 composants de l’origine

A
  • cells pigmentaire – recoivent la lumiere comme un ecran .. reflexion influs lumineux
    cell sensorielle de la retine en cones et battonets
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3
Q

c à cones ou?

A
  • tache jaune = r. maculaire centrée par la fovéa
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4
Q

lésion de la bandelette o->

A
  • hemianopsie laterale homonyme
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5
Q

lésion temporale

A
  • hemianopsie altitudinale?
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6
Q

2 types de fibres dans les bandelttes optiques?

A

-1/ fibres visuelles sensorielles proprement dites

2/ fibres associatives du reflexe

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7
Q

le 80% des fibres de la BO-> en 2 fx lesquelles? appelation OTT..

A
  • sup parietal -> levre sup de la scisure calCARine

- inf temporalle contourne la corne temporale du ventricule lat (MEYER’s loop) -> levre inf de la scisure CALCARINE

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8
Q

20% BO -> 3fx lesq

A
  • associatives -> synapse dans le CGL -> thalamus (pulvinar)
  • reflexes -> TRAVERSENT LE cgl -> tQuad ant -> nerf 3 occulomoteur
  • neurovegetatifs -> synapse CGL -> hypothalamus
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9
Q

axones du 3eme neuronne se projettent ou et forment quoi?

A

aires visuelle primaire, forment les RADIATIONS OPTIQUES

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