Neuroanatomy — Flashcards

Flashcard 451: The corticobulbar innervation of cranial nerve lower motoneurons is predominantly _____-lateral

Answer: bi

Flashcard 452: Strokes involving the lenticulostriate artery typically involve the _____ and internal capsule

Answer: striatum

Flashcard 453: What does Brodmann area 3, 1, 2 refer to? _____

Answer: Primary somatosensory cortex

Flashcard 454: Which cranial nerve provides somatosensation to the posterior 1/3rd of the tongue? Where else does this nerve provide innervation?

Answer: Glossopharyngeal nerve (CN IX) Also provides: - Taste (posterior 1/3rd) - Motor (Stylopharyngeus muscle) - Parasympathetic (Parotid gland) - Sensory (Oropharynx, carotid sinus/body, middle ear)

Flashcard 455: 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 456: The 3rd-order neuron of the dorsal column-medial lemniscal tract travels to the _____

Answer: primary somatosensory cortex (postcentral gyrus)

Flashcard 457: 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 458: The middle layer of the cerebellar cortex is the _____ layer

Answer: Purkinje

Flashcard 459: Thyrotropin-releasing hormone (TRH) is secreted by the _____ nuclei of the hypothalamus

Answer: paraventricular

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

Answer: parasagittal