Neuroanatomy — Flashcards

Flashcard 401: Colloid cysts are a pathologically benign tumor usually found in the _____

Answer: 3rd ventricle

Flashcard 402: 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 403: What syndrome is associated with a lesion of the following areas? 1. Corticospinal tract 2. Medial lemniscus 3. Abducens nerve (CN VI)

Answer: Medial pontine syndrome (Middle alternating hemiplegia)

Flashcard 404: The trophozoite form of Naegleria fowleri infects the CNS by passing through the _____

Answer: cribriform plate

Flashcard 405: The _____ of the cerebellum controls the truncal and proximal musculature of limbs

Answer: vermis

Flashcard 406: _____ help maintain the blood-brain-barrier via foot processes

Answer: Astrocytes

Flashcard 407: What dermatome is found at the high turtleneck shirt level? _____

Answer: C3

Flashcard 408: Which brainstem tract coordinates conjugate horizontal eye movements by connecting the nuclei of CN VI and the contralateral CN III?

Answer: Medial longitudinal fasciculus (MLF)

Extra: The MLF coordinates conjugate horizontal eye movements by connecting the abducens nucleus (CN VI) to the contralateral oculomotor nucleus (CN III). Damage to the MLF results in Internuclear Ophthalmoplegia (INO), which is highly characteristic of Multiple Sclerosis.

Flashcard 409: Which thalamic nucleus receives auditory input from the inferior colliculus and superior olive? _____

Answer: Medial geniculate body (MGB)

Flashcard 410: Which cranial nerve is responsible for the efferent limb of the lacrimation reflex? _____

Answer: CN VII