Neuroanatomy — Flashcards

Flashcard 441: Lesion to which artery affects the nucleus ambiguus? _____

Answer: Posterior inferior cerebellar artery (PICA)

Flashcard 442: _____ aphasia is caused by damage to Broca's area, Wernicke's area, and the arcuate fasciculus

Answer: Global

Flashcard 443: The _____ of the reticular formation is a collection of nuclei surrounding the cerebral aqueduct in the midbrain

Answer: periaqueductal (central) gray

Flashcard 444: The corticobulbar innervation of cranial nerve lower motoneurons is predominantly _____-lateral

Answer: bi

Flashcard 445: Which brainstem pathway carries conscious proprioception, fine touch, and vibration from the contralateral side of the body to the thalamus?

Answer: Medial lemniscus

Extra: The medial lemniscus is formed by the decussation of second-order neurons (internal arcuate fibers) originating from the nucleus gracilis and nucleus cuneatus in the medulla. It ascends through the brainstem to synapse in the Ventral Posterolateral (VPL) nucleus of the thalamus.

Flashcard 446: 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 447: At the end of each semicircular canal (ampulla) are _____ cells, which act as receptors

Answer: hair

Flashcard 448: Strokes involving the lenticulostriate artery typically involve the _____ and internal capsule

Answer: striatum

Flashcard 449: The closer a destructive axon lesion is to the neuronal _____, the more likely the neuron is to die

Answer: cell body

Flashcard 450: What does Brodmann area 3, 1, 2 refer to? _____

Answer: Primary somatosensory cortex