NEET PG Medical – 2013 – Question – 3
Spinal cord develops from ?
a) Neural tube
b) Mesencephalon
c) Rhombencephalon
d) Prosencephalon
Correct Answer – A
Ans. is ‘a’ i.e., Neural tube
Nervous system develops from ectoderm (neuroectoderm). Nervous system develops from neural tube which in turn develops by process of neurulation, i.e. formation of neural plate and its in folding into neural tube. Structures formed from neural tube are :?
1. From cranial part (enlarged cephalic part)
Gives rise to brain. Developmental parts are : Forebrain (prosencephalon)
Telencephalon : Cerebral hemisphere and lateral ventricle.
Diencephalon : Optic cup and stalk (gives rise to retina), pituitary, thalamus, hypothalamus, epithalamus, pineal gland, and third ventricle.
Midbrain (mesencephalon)
Cerebral aqueduct.
Hindbrain (rhombencephalon)
Metencephalon : Cerebellum, pons
Myelencephalon : Medulla oblongata
2. From caudal part Gives rise to spinal cord
