Brain and Neuroanatomy — Flashcards

Flashcard 251: _____ sulcus is superficially situated and does not indent the lateral ventricle.

Answer: Incomplete

Flashcard 252: Unilateral trigeminal nerve compression can be due to _____ artery

Answer: superior cerebellar

Flashcard 253: _____ is a flat fibrous sheet on either side of the spinal cord present between the ventral and dorsal spinal roots

Answer: Ligamentum denticulatum (Modification of Pia mater)

Flashcard 254: The _____ input constitutes the largest input to the thalamus

Answer: cerebral cortex

Flashcard 255: The largest division of the thalamus is the _____ thalamic nuclei.

Answer: lateral

Flashcard 256: Foramen of the skull:What part of the brain passes through the posterior part of foramen magnum?_____

Answer: medulla oblongata and cerebellar tonsils (2)

Flashcard 257: In the first 2 decades of life, ependymomas typically occur near the floor of the _____

Answer: fourth ventricle

Flashcard 258: Relations of the Thalamus:Anterior pole of thalamus forms the posterior boundary of the _____

Answer: interventricular foramen

Flashcard 259: Which cranial fossa is supplied by all three branches of the trigeminal nerve?

Answer: Middle cranial fossa

Extra: The **middle cranial fossa** is supplied by meningeal branches from all three divisions of the trigeminal nerve: - **V1 (Ophthalmic):** Recurrent meningeal branch (Nervus tentorii) - **V2 (Maxillary):** Meningeal branch - **V3 (Mandibular):** Nervus spinosus (Meningeal branch) In contrast: - **Anterior cranial fossa:** Supplied by V1 (ethmoidal nerves) and V2 (meningeal branches). - **Posterior cranial fossa:** Supplied by CN X (vagus) and CN XII (meningeal branches carrying fibers from C1-C2).

Flashcard 260: _____ artery forms the main supply of the ventral optic chiasma

Answer: Anterior communicating and internal carotid