Neuroanatomy — Flashcards

Flashcard 91: globus pallidus externus (GPe)

Answer:

Extra: putamensubthalamic nucleus (STN)

Flashcard 92: What are the main pathways of the basal ganglia?

Answer: direct, indirect

Flashcard 93: What structures comprise the lentiform nucleus (of the basal ganglia)?

Answer: putamen, globus pallidus

Flashcard 94: What structures comprise the striatum (of the basal ganglia)?

Answer: caudate, putamen

Flashcard 95: Arnold-Chiari malformation type I

Answer:

Extra: congenital herniation of cerebellar tonsils, unsteady gait, headache, neck paincongenital herniation of cerebellar tonsils (+/- syringomyelia)

Flashcard 96: spina bifida with meningocele

Answer:

Extra: newborn with fluid-filled sac protruding from lower spinesurgerymaternal folate deficiencyfailure of bony spinal canal closure with herniation of meninges

Flashcard 97: spina bifida occulta

Answer:

Extra: newborn with tuft of hair or dimple in lower spinesurgery, but not usually necessarymaternal folate deficiencyfailure of bony spinal canal closure

Flashcard 98: Where is the suprachiasmatic nucleus (SCN) located?

Answer: hypothalamus

Flashcard 99: How many axons can be myelinated by a single Schwann cell?

Answer: one

Flashcard 100: How many axons can be myelinated by a single oligodendroglia?

Answer: multiple (up to 50) mnemonic: "oligodendro" means "few branches" for a few axons