Samenvatting Neuro Anatomie Fysiologie
HC8 – Hersenstam en fysiologie van de blikbewegingen, Kirsten van Baarsen
Langzaam versus snelle oogbewegingen
Langzaam gladde oogbeweging, vergentie, fusie, VOR en OKN
Snel Saccades, VOR, OKN
Gladde oogbewegingen (smooth pursuit)
- Snelheid van ongeveer 0,1-70 graad/seconde
- Latentietijd 100-130 ms
- Drijvende factor smooth pursuit retinale slip
- Stimuli
Doelsnelheid – bepaalde snelheid die je volgt
Doelpositie – positie van het voorwerp
Motor commando – je oogbeweging kunnen aansturen
Propriocepsie – voelt ...
Perceptie (stroboscoop) – je kunt een beweging simuleren
Pathway
Voornamelijk in de grote hersenen (cerebrale cortex)
- Pons
DLPN (dorsaal lateraal pontinus nucleus) –
horizontale gladde volgbewegingen
Rostrale nucleus – verticaal gladde
volgbewegingen
- Cerebellum – zorgt voor de fine tuning van de
oogbewegingen
Flocculus
Paraflocculus
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