Brain and Neuroanatomy — Flashcards

Flashcard 261: Ependymomas are usually _____-tentorial tumors

Answer: infra

Flashcard 262: What part of the internal capsule carry the occipitopontine fibres?_____

Answer: Retrolentiform

Flashcard 263: What is the classic triad of **Dandy-Walker malformation**?

Answer: 1. Hypoplasia or agenesis of the **cerebellar vermis** 2. **Cystic dilation of the 4th ventricle** 3. **Enlargement of the posterior fossa** (with upward displacement of the tentorium)

Extra: Dandy-Walker malformation is often associated with **agenesis of the corpus callosum** (in ~25% of cases) and hydrocephalus. **Differential Diagnosis:** * **Mega cisterna magna:** Normal vermis, normal 4th ventricle, enlarged cisterna magna. * **Blake pouch cyst:** Normal vermis, cystic structure in posterior fossa communicating with 4th ventricle.

Flashcard 264: The foveola forms the bottom of the fovea and is devoid of _____ cells

Answer: ganglion

Flashcard 265: Stem cells of the brain are located in the subventricular zone and the _____ gyrus

Answer: dentate

Flashcard 266: Which condition is characterised by atresia of the median aperture (foramen of Magendie) and lateral aperture (foramen of Luschka) of the 4th ventricle?_____

Answer: Dandy-Walker syndrome

Flashcard 267: Both retrolentiform and sublentiform parts of the internal capsule carry the _____ fibres

Answer: parietopontine

Flashcard 268: Great cerebral vein opens into the _____ sinus

Answer: straight

Flashcard 269: Nomenclature of basal ganglia:Corpus striatum: _____

Answer: Caudate nucleus + putamen+ globus pallidus (3)

Flashcard 270: In pupillary light reflex pathway, fourth neurons (postganglionic motor) leaves the ciliary ganglion and passes in the _____ nerves to innervate the sphincter pupillae.

Answer: short ciliary