Neuroanatomy — Flashcards

Flashcard 461: The 3rd-order neuron of the dorsal column-medial lemniscal tract travels to the _____

Answer: primary somatosensory cortex (postcentral gyrus)

Flashcard 462: Which Brodmann area corresponds to the **Frontal eye field**?

Answer: Brodmann area 8

Extra: The frontal eye field (FEF) is located in the posterior part of the middle frontal gyrus. It is responsible for voluntary (saccadic) eye movements to the contralateral side. Destructive lesions to this area result in the eyes deviating toward the side of the lesion ("looking at the lesion").

Flashcard 463: What is the adult derivative of the cavity of the diencephalon? _____

Answer: Third ventricle

Flashcard 464: What brainstem tract carries fine touch, vibration, and conscious proprioception from the contralateral gracile and cuneate nuclei to the thalamus?

Answer: Medial lemniscus

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

Flashcard 465: Meningiomas most often occur near surfaces of the brain, especially _____ regions

Answer: parasagittal

Flashcard 466: Which spinal cord level contains mostly gray matter (relative to white matter)? _____

Answer: Sacral

Flashcard 467: What is the destination of the ventral posterolateral (VPL) nucleus of the thalamus? _____

Answer: Primary somatosensory cortex

Flashcard 468: The medial lemniscus is initially positioned _____ (medially or laterally) in the caudal medulla

Answer: medially

Flashcard 469: _____ herniation is a potentially lethal complication of epidural hematoma

Answer: Transtentorial

Flashcard 470: Upper motoneurons initially descend _____-lateral to the LMNs they innervate

Answer: contra