Brainstem nuclei — Flashcards

Flashcard 31: Which brainstem nucleus receives discriminative touch and pressure sensations from the face via the trigeminal nerve (CN V)?

Answer: Main (Principal) sensory nucleus of CN V

Extra: The main sensory nucleus of CN V is located in the mid-pons. It mediates fine touch and pressure from the face, functioning similarly to the dorsal column-medial lemniscus system of the body.

Flashcard 32: Which brainstem nucleus is located in the vestibular area of the floor of the 4th ventricle and receives sensory input for balance?

Answer: Vestibular nucleus

Flashcard 33: The dorsal and ventral respiratory groups are located in the _____ of the brain stem

Answer: medulla

Flashcard 34: The _____ nucleus is coexistent with the paramedian pontine reticular formation (PPRF), the center for ipsilateral horizontal gaze

Answer: abducens

Flashcard 35: Which brainstem nucleus receives pain and temperature sensation from the face via the trigeminal nerve (CN V)?

Answer: Spinal trigeminal nucleus

Flashcard 36: Which trigeminal nerve nucleus receives pain and temperature sensations from CN V distributions? _____

Answer: Spinal trigeminal nucleus Bb

Flashcard 37: Which trigeminal nerve nuclei forms the sensory limb of the jaw jerk reflex? _____

Answer: Mesencephalic nucleus

Flashcard 38: Lesions to the abducens nucleus may result in complete, ipsilateral _____ paralysis, in addition to symptoms of abducens/PPRF lesion

Answer: facial

Flashcard 39: The nucleus cuneatus and nucleus gracilis are located in the _____

Answer: caudal medulla

Flashcard 40: Which level of the brainstem is characterized by the absence of the 4th ventricle and the decussation of the medullary pyramids?

Answer: Closed medulla