Fisiologi Mata II
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Transcript of Fisiologi Mata II
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Reseptor dan Fungsi Neural Retina
Farchan Azzumar G0011090
Asisten Laboratorium Fisiologi
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At a glance anatomy of eye...
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Mata kanantitik fokus dan bintik buta
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Mata kiri-Mata kanan
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Mana bintik butanya?
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• Cahaya dari benda ke Retina • Bagaimana Retina mengubah sinyal • Neurofisiologi Penglihatan Sentral
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Reseptor dan Fungsi Neural Retina
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Sel Batang (rod cell) dan Sel Kerucut (cones)
• Sel batang• Sel kerucut
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Figure 3.12 The distribution of rods and cones in the retina. The eye on the left indicates locations in degrees relative to the fovea. These locations are repeated along the bottom of the chart on the right. The vertical brown bar near 20 degrees indicates the place on the retina where there are no receptors because this is where the ganglion cells leave the eye to form the optic nerve.
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MINAZHULUMATI...
ILA NUR...
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Rhodopsin with cis retinal
Rhodopsin with trans retinal
Light- fast (ms)
Dark - slow (mins)
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Apa perbedaan sinaps inhibitorik dengan sinap eksitatorik??
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In the light
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In the dark
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Sel Kerucut
• Memiliki fotokimia warna yang sangat sensitif terhadap cahaya monokromatik dasar
• 1. Merah • 2. Hijau • 3. Biru
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NEUROFISIOLOGI PENGLIHATAN SENTRAL
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Neurofisiologi Penglihatan Sentral
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Pre Kiasma
Kiasma
Post Kiasma
GANGGUAN SARAF OPTIK DIBAGI ATAS 3 TOPIK
www.lrn.org
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GANGGUAN PREKIASMA
a) AAION
b) NEURITIS OPTIKA : PAPILITIS, NEUTITIS RETROBULBAR
c) EDEMA PAPIL
d) ATROFI SARAF OPTIK
GANGGUAN KIASMA a) TUMOR KELENJAR HIPOFISE
b) ANEURISMA PEMBULUH DARAH
c) PERADANGAN, MISAL: MENINGITIS, ARAKHNOIDITIS
d) HIDROSEFALUS
GANGGUAN POST KIASMA
LESI MULAI DARI TRAKTUS OPTIKUS KORTEKS KALKARINA SERTA GANGGUAN FUNGSI DARI KORTEKS OTAK YANG TERLIBAT DALAM SISTEM SARAF VISUAL.
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Kerusakan Nervus Optikus Retrobulbair
www.jeffmann.net
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GANGGUAN KIASMA
Kiasma Nervus Opticus
lynnwei.com
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Gangguan Medan Penglihatan Akibat Gangguan di Kiasma Nervus Opticus
www.jeffmann.net
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GANGGUAN TRAKTUS OPTIC
www.jeffmann.net
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RADIATIO OPTIKA
commons.wikimedia.org
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GANGGUAN RADIATIO OPTIKA
www.jeffmann.net
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KORTEKS VISUAL
homepage.psy.utexas.edu
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GANGGUAN KORTEKS VISUAL
www.jeffmann.net
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merci...