Development of CNS Flashcards
Ectoderm - 2 types
Surface and neuroectoderm
Neural groove is formed by
Neuroectoderm
NCC derived from
Ectoderm.
Cranial neuropore closes by
25th D
Caudal neuropore closes by
28th D
Failure of closure of Cranial neuropore
Anencephaly
Failure of closure of Caudal neuropore
Rachischisis
Rachischisis
Failure of closure of Caudal neuropore
Remnant of Cranial neuropore
Lamina terminalis
Lamina terminalis is remnant of
Cranial neuropore
Remnant of Caudal neuropore
Terminal ventricle
Terminal ventricle is a Remnant of
Caudal neuropore
Primary vesicles of brain
Prosencephalon
Mesencephalon
Rhombencephalon
Cranial part of NT forms
Brain
Caudal part of NT forms
Spinalcord
Secondary vesicles of brain are
Telen, Dien, Mesen, Meten and Mylencephalon.
Telencephalon gives rise to
Cerebral cortex and Corpus striatum
Cerebral cortex and Corpus striatum - derived from
Telencephalon
Thalamus, hypothalamus, Metathalamus, Epithalamus, Pars Nervosa and Optic stalk are derived from which vesicle
Diencephalon
Diencephalon gives rise to
Thalamus, hypothalamus, Metathalamus, Epithalamus, Pars Nervosa and Optic stalk
Optic stalk gives rise to
Retina and optic nerve
Pons and cerebellum are derived from which vesicle
Metencephalon
Metencephalon gives rise to
Pons and cerebellum
Myelencephalon gives rise to
medulla
Medulla derived from
Myelencephalon
Cavity in Telencephalon
Lateral ventricles
Cavity in Diencephalon
3rd ventricle
Cavity in Mesencephalon
Aqueduct of Sylvius
Cavity in Meten and myelencephalon
4th ventricle
Medial geniculate body is present in
Metathalamus of Diencephalon
Substantia nigra
Mesencephalon
Entire NT open - condition is called as
Craniorachischisis
Craniorachischisis
Entire NT open
Most severe form of NTD
Craniorachischisis