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EMBRIOLOGI SISTEM SARAF PUSAT

EMBRIOLOGI SISTEM SARAF PUSAT. Berasal dari lapis ektoderm .  Lapis Ektodermal berdiferensiasi :  Ektoderm Luar (Epidermis)  Krista Syaraf (Neural crest cells)  Buluh Syaraf (Neural tube). Perkembangan sistem syaraf diawali dengan proses Neurulasi

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EMBRIOLOGI SISTEM SARAF PUSAT

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  1. EMBRIOLOGI SISTEM SARAF PUSAT

  2. Berasaldari lapis ektoderm.  Lapis Ektodermal berdiferensiasi:  EktodermLuar (Epidermis)  Krista Syaraf (Neural crest cells)  BuluhSyaraf (Neural tube)

  3. Perkembangansistemsyaraf • diawalidenganprosesNeurulasi • Induksinotokordapadaektoderm : • Penebalanlempenglipatan • alur BULUH.

  4. Neurulasi Primer 1. Differensiasi lempengsyaraf 2. Pembentukan Lipatansyaraf 3. PembentukanAlur syaraf 4. Penutupan Lipatan/Alursyaraf -> membentuk Buluhsyaraf

  5. NeurulasiSekunder : 1. Terjadi pada daerah di atasneuropor posterior 2. Padadaerah lumbar danekor 3. Dimulaidengan pembentukansumsum 4. Kavitasidarisumsummembentukronggabuluhsyaraf

  6. PERKEMBANGAN OTAK (telencephalon, diencephalon, mesencephalon, metencephalon, dan myelencephalon) danmedula spinalis

  7. ALIRAN LCS

  8. LCS dihasilkanolehpleksuschoroideus ventriculuslateralis ventriculustertius aquaductussylvii ventriculusquartus SSPATIUM SUBARACHNOIDEA Dari sinicairanmungkinmengalirdiataskonveksitasotakkedalamrongga subarachnoid spinal. Sejumlahkecildireabsorpsi (melaluidifusi) kedalampembuluh-pembuluhkecildipiamaterataudinding ventricular, dansisanyaberjalanmelaluijonjotarachnoidkedalam vena (dari sinus atau vena-vena) diberbagaidaerah – kebanyakandiataskonveksitassuperior.

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