Neuroanatomy — Flashcards

Flashcard 451: Identify the motor speech area located in the inferior frontal gyrus (Brodmann areas 44 and 45).

Answer: Broca's area

Flashcard 452: Do dorsal rami of spinal nerves contain sensory or motor neurons? _____

Answer: Both

Flashcard 453: Light reflex: Light in either retina sends a signal via CN II to the _____ nuclei

Answer: pretectal

Flashcard 454: The auditory information from the medial geniculate body projects to the _____ of the superior temporal gyrus

Answer: primary auditory cortex

Flashcard 455: What is the adult derivative of the cavity of the diencephalon? _____

Answer: Third ventricle

Flashcard 456: Which descending motor tract is responsible for voluntary movement of the limbs and decussates at the medullary pyramids?

Answer: Lateral corticospinal tract

Flashcard 457: Identify the spinal cord level characterized by a small overall diameter, a high ratio of gray matter to white matter, and large ventral and dorsal horns:

Answer: Sacral

Flashcard 458: The 3rd-order neuron of the dorsal column-medial lemniscal tract travels to the _____

Answer: primary somatosensory cortex (postcentral gyrus)

Flashcard 459: 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 460: Meningiomas most often occur near surfaces of the brain, especially _____ regions

Answer: parasagittal