Nerulation & Neural Development | Developmental Biology | CSIR DBT JRF 2026 | Lec-38 | IFAS

Nerulation & Neural Development | Developmental Biology | CSIR DBT JRF 2026 | Lec-38 | IFAS explained with clear concepts and exam-focused approach. Covers primary neurulation, secondary neurulation, BMP signaling, neural crest, PYQs, and tricks. Perfect for CSIR NET, DBT JRF, GATE, and ICAR ARS aspirants. 🔥 Join India's Best Life Science Coaching - IFAS Online! 🔥 Live Online Batch: Super Emotion Batch 7.7 - Starts on 8 June 2026 🔥 Recorded Online Batch: Revolution Batch 7.7 from Live Batch Completed on 16 May 2026 🔥 New Crash Course for CSIR NET July 2026 Starts on Starts on 8 June 2026 📞 Need Guidance? Call/WhatsApp: 9172266888 ━━━━━━━━━━━━━━━━━━━━━━━━━ ⏳ Lecture Timeline: [00:00:00] – Introduction to Nerulation & Neural Development [00:09:36] – Nervous System Origin (Ectoderm) [00:10:39] – Three Ectodermal Fates [00:15:25] – BMP Gradient Determines Fate [00:20:47] – Neurulation in Amphibians [00:23:50] – Neural Plate to Neural Tube [00:29:28] – Sox Transcription Factors (Sox1,2,3) [00:31:13] – Sox Factors Inhibit BMP [00:33:21] – Primary vs Secondary Neurulation [00:34:55] – Secondary Neurulation: Mesenchymal Aggregation [00:35:36] – Anterior (Primary) / Posterior (Secondary) Division [00:39:44] – Primary Neurulation Steps [00:42:10] – Primary Neurulation Mechanism (Detailed) [00:44:13] – 4 Stages: Elongation, Bending, Convergence, Closure [00:46:09] – Stage 1: Elongation & Folding [00:47:46] – Stage 2: Bending & Hinge Points (MHP/DLHP) [00:50:59] – Molecular Signals: BMP, Noggin, Shh [00:52:36] – Neural Tube Closure [00:55:52] – Neural Crest Cell Delamination [00:58:58] – Signaling Summary: Noggin/BMP/Shh [01:04:06] – Neural Tube Closure Defects: Anencephaly [01:08:12] – Cadherins Role (N‑Cadherin vs E‑Cadherin) [01:09:57] – Cadherin Missexpression Blocks Separation [01:11:32] – Secondary Neurulation Process [01:12:05] – Mesenchymal Condensation → Cavitation [01:15:25] – Complete Session (Nerulation & Neural Development) ━━━━━━━━━━━━━━━━━━━━━━━━━ 📖 Topics Covered in This Lecture: • Primary Neurulation – neural plate, folds, tube formation • Secondary Neurulation – mesenchymal condensation, cord • BMP Signaling & Ectoderm Fates (high/mod/low) • Sox Transcription Factors, N‑cadherin vs E‑cadherin • Neural Tube Closure Defects – anencephaly, PYQ problems ━━━━━━━━━━━━━━━━━━━━━━━━━ 📚 Lecture Summary: In this session, IFAS Expert Faculty focuses on neurulation and neural development with key concepts: primary neurulation stages (elongation, bending, convergence, closure), secondary neurulation via mesenchymal condensation, BMP morphogen gradient dictating ectoderm fates, Sox1/2/3 in neural plate specification, and cadherin switching for tube separation. PYQ‑relevant problems, anencephaly cause, and memory tricks make this neural development lecture exam‑ready for CSIR NET and DBT JRF. ━━━━━━━━━━━━━━━━━━━━━━━━━ 🎓 This lecture is highly beneficial for students preparing for: ✅ CSIR NET Life Science ✅ GATE Life Science ✅ GATE Biotechnology ✅ GATE Ecology & Evolutuon ✅ BET (DBT) ✅DHR ICMR (BRET) ✅ TIFR Biology  ✅ BARC Bioscience  ✅ SET / PhD Entrance Exams ━━━━━━━━━━━━━━━━━━━━━━━━━ 🏆 Why IFAS is India’s No. 1 Choice for CSIR NET & GATE Life Science? (Our Results Speak): ✅ CSIR NET Dec 2025: 4000+ Selections (AIR 3, 8, 9, 9...) ✅ CSIR NET June 2025: 4200+ Selections (AIR 1, 2, 6, 10...) ✅ CSIR NET Dec 2024: 4000+ Selections (AIR 5, 6, 7, 8, 9...) ✅ CSIR NET June 2024: 2000+ Selections (AIR 3, 10, 13...) ✅ CSIR NET Dec 2023: 1200+ Selections (AIR 2, 4, 5...) 📄 View IFAS Result Sheet: 👉 https://drive.google.com/file/d/1THh6... ━━━━━━━━━━━━━━━━━━━━━━━━━ 🔗 Important Links: 🌍 Visit our Website: https://ifasonline.com 📞 Contact for Queries: 9172266888 📘 Free Counselling: https://ifasonline.com/csir-net/life-... ━━━━━━━━━━━━━━━━━━━━━━━━━ 🔗 India's Best Online Classes and Books: 🔥CSIR NET Life Science Live & Recorded Course: https://ifasonline.com/csir-net/life-... 🎯 GATE Life Science Recorded Course: https://ifasonline.com/gate/life-scie... 🎯 GATE Biotechnology Recorded Course: https://ifasonline.com/gate/biotechno... 📘CSIR NET Life Science Books: https://ifasonline.com/csir-net/life-... ━━━━━━━━━━━━━━━━━━━━━━━━━ 📲 Download IFAS App: Android: https://play.google.com/store/apps/de... IOS: https://apps.apple.com/us/app/ifas/id... ━━━━━━━━━━━━━━━━━━━━━━━━━ Stay Updated Via Other Social Media: ✔ Telegram: https://t.me/IfasLifeScience ✔ Instagram:   / csir_net_life_science_ifas   #nerulation #neural #developmentalbiology #csirnetlifescience #gatelifescience #gatebt #setlifescience