Neuroanatomy — Flashcards

Flashcard 381: Identify the spinal cord level based on these histological features: oval shape, largest amount of white matter, and presence of both fasciculus gracilis and fasciculus cuneatus: _____

Answer: Cervical

Flashcard 382: Most fibers in the optic tract project to the _____ of the thalamus

Answer: lateral geniculate body

Flashcard 383: The _____ comprises the nerve roots of lumbar, sacral, and coccygeal spinal nerves below the conus medullaris

Answer: cauda equina

Flashcard 384: Cauda equina syndrome may be associated with '_____ anesthesia'

Answer: saddle (S3-S5)

Flashcard 385: Where is the nucleus of CN XI (accessory nucleus) located? _____

Answer: Spinal cord

Flashcard 386: Damage to the watershed zone between the middle and posterior cerebral arteries results in defects in higher-order _____ processing

Answer: visual

Flashcard 387: What syndrome is associated with lesion of the following areas? 1. Spinothalamic tract 2. Spinal trigeminal nucleus 3. Hypothalamospinal tract 4. Nucleus ambiguus (CN IX, X) 5. Vestibular nucleus (CN VIII) 6. Inferior cerebellar peduncle

Answer: Lateral medullary (Wallenberg) syndrome

Flashcard 388: The inferior colliculus sends auditory information to the _____ of the thalamus

Answer: medial geniculate body

Flashcard 389: Which brainstem pathway carries fine touch, vibration, and proprioception from the body to the VPL nucleus of the thalamus?

Answer: Medial lemniscus

Extra: The medial lemniscus is formed by the decussation of second-order neurons (internal arcuate fibers) from the nucleus gracilis and cuneatus in the medulla. It carries fine touch, vibration, and proprioception to the VPL nucleus of the thalamus.

Flashcard 390: How many neurons are required for the dorsal column-medial lemniscus pathway? _____

Answer: Three