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ONTOGENI SUSUNAN SARAF PUSAT
Mulai nampak pd minggu ketiga
Berupa penebalan ectoderm berbentuk lembaran disebut NEURAL PLATE
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SSP
• NEURAL PLATE
• PLICA NEURALIS
• NEURAL GROOVE
• NEURAL TUBE
• NEUROPORUS ANTERIOR
• NEUROPORUS POSTERIOR
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ENCEPHALON
• PROSENCEPHALON
• MESENCEPHALON
• RHOMBENCEPHALON
Flexura cervicalis
Flexura cephalica
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ENCEPHALONPROSENCEPHALON: TELENCEPHALON ---- HEMISPHERIUM DIENCEPHALON
MESENCEPHALONRHOMBENCEPHALON: METENCEPHALON: PONS CEREBELLUM MYELENCEPHALON----- MEDULLA OBLONGATA
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MEDULLA SPINALIS
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MEDULLA SPINALIS
Sel-sel yang terdapat pada dinding neural tube membentuk
jaringan epithel pseudo stratified: disebut neuro epithel
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Pseudo stratified
Inti sel yang megalami syntesis DNA mengambil tempat di permukaan luar. Pada waktu mengalami mitosis mengambil tempat pada bagian dalam
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• Di sekelililing neuro epithel terbentuk lapisan sel-sel saraf yang disebut lapisan mantel yang kelak akan menjadi substansia gricea
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• Sel-sel pada lapisan mantel mengeluarkan serabut-serabut saraf yang membentuk lapisan di sekeliling lapisan mantel, disebut lapisan marginal yang kelak menjadi substansia alba
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ASCENSUS MEDULLA SPINALIS
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Kelainan Bawaan
Spina Bivida Meningocele
Meningo myelocele
Anecephaly
Hydrocephaly
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