Neuroanatomy — Flashcards

Flashcard 471: Which spinal tract transmits pain and temperature sensation?

Answer: Spinothalamic tract

Flashcard 472: Upper motoneurons initially descend _____-lateral to the LMNs they innervate

Answer: contra

Flashcard 473: What visual deficit results from lesion of the optic chiasm (e.g. pituitary adenoma, craniopharyngioma)? _____

Answer: Bitemporal hemianopia

Flashcard 474: The cell bodies of upper motoneurons are primarily found in the _____

Answer: primary motor cortex (precentral gyrus)

Flashcard 475: The major outflow from the cerebellum travels in the _____ peduncle

Answer: superior cerebellar

Flashcard 476: What structure is formed by the decussation of internal arcuate fibers in the medulla and carries fine touch, vibration, and proprioception to the VPL nucleus of the thalamus?

Answer: Medial lemniscus

Extra: The medial lemniscus represents the second-order neurons of the dorsal column-medial lemniscus (DCML) system. These neurons originate in the nucleus gracilis and nucleus cuneatus, cross the midline as internal arcuate fibers in the medulla, and ascend to the ventral posterolateral (VPL) nucleus of the thalamus.

Flashcard 477: Identify the brainstem level characterized by:\n- Presence of 4th ventricle\n- Ventral enlargement\n- Presence of CN V

Answer: Rostral pons

Flashcard 478: What cells synthesize the myelin for cranial nerve I?_____

Answer: None

Flashcard 479: There is/are _____ coccygeal pair of spinal nerves

Answer: one

Flashcard 480: _____ are mural cells that wrap around endothelial cells and contribute to the blood-brain barrier

Answer: Pericytes