Pons Flashcards
The Pons is located between what two brainstem structures?
The midbrain (Superiorly) and Medulla (Inferiorly)
The massive group of fibers in the basilar pons that run transversely and arise from the deep pontine nuclei are called what?
Transverse pontine fibers (pontocerebellar)
The _____ is a continuation of the transverse pontine fibers (pontocerebellar), and is a “bridge” between the pons and cerebellum
Middle cerebellar peduncle
What nuclei of CN V (Trigeminal) are in the rostral pons?
- main sensory of V
- mesencephalic of V
- motor nuclei of V
What nuclei of CN V are in the caudal pons?
-spinal nucleus of V
Motor nuclei of CNs VI (Abducens) and VII (Facial) are in the ____ Pons
Caudal
Which nucleus of the Pons serves as a GSE LMN that innervates the lateral rectus muscle of the eye?
Abducens nucleus (VI)
This nucleus lies in the ventrolateral aspect of the tegmentum of the caudal Pons.
Facial nucleus (VII)
This nucleus lies in the dorsomedial aspect of the caudal Pons close to the floor of the fourth ventricle.
Abducens nucleus (VI)
The axons of the facial nerve (VII) are classified as ____ fibers (3 letter listing)
SVE
The fibers from what nucleus/nerve innervate the muscles controlling ipsilateral facial expression?
Facial (VII)
Which vestibular nuclei are present in the caudal pons? (The other two are present in the medulla)
Superior and lateral
Which auditory relay structures appear at the level of the caudal pons? (3)
- trapezoid body
- superior olivary nucleus
- lateral lemniscus
This GVE nucleus lies just ventrolateral to the Abducens nucleus in the caudal pons. It gives rise to preganglionic parasympathetic axons of CN VII, which innervate submandibular and pterygopalatine ganglia
Superior salivatory nucleus
Axons from the main sensory nucleus of V project to what nucleus of the thalamus?
Ventral posteromedial nucleus (VPM)
