CSF production and circulation — Flashcards

Flashcard 1: Identify the brainstem level characterized by the presence of colliculi, the cerebral aqueduct, and the exit of CN IV.

Answer: Caudal midbrain (at the level of the inferior colliculus)

Flashcard 2: The _____ of the reticular formation is a collection of nuclei surrounding the cerebral aqueduct in the midbrain

Answer: periaqueductal (central) gray

Flashcard 3: Identify the brainstem level characterized by the following features: - Colliculi - Cerebral aqueduct - Cerebral peduncles - Oculomotor nerve (CN III)

Answer: Rostral midbrain

Extra: The presence of CN III (oculomotor nerve) nuclei and exiting fibers specifically identifies the **rostral** level of the midbrain (at the level of the superior colliculus). The caudal midbrain is characterized by the inferior colliculus and the trochlear nerve (CN IV).

Flashcard 4: Medulloblastomas grow rapidly and spread via _____

Answer: CSF

Flashcard 5: The major outflow from the cerebellum travels in the _____ peduncle

Answer: superior cerebellar

Flashcard 6: What is an Argyll-Robertson pupil?

Answer: pupil that is unreactive to light but constricts with accomodation

Flashcard 7: Embryological origin of the neurohypophysis

Answer: Neuroectoderm (Diencephalon)

Extra: The neurohypophysis (posterior pituitary) develops from a downward extension of the neuroectoderm from the floor of the diencephalon (the infundibulum). In contrast, the adenohypophysis (anterior pituitary) develops from Rathke's pouch (oral ectoderm).

Flashcard 8: pineal gland

Answer: neuroectoderm

Flashcard 9: retina

Answer: neuroectoderm

Flashcard 10: optic nerve

Answer: neuroectoderm