brainstem - internal anatomy of pons Flashcards
shallow midline groove for
the basilar artery
basilar groove
rostral boundary of anterior pons
cerebral peduncles
superior pontine sulcus
lateral boundary of anterior pons
middle cerebellar peduncles
caudal boundary of anterior pons
inferior pontine sulcus
Emerge on anterolateral surface of anterior pons
trigeminal nerve
discuss roots of trigeminal nerve
smaller medial motor root
larger lateral sensory root
emerges between pons and medulla; pontomedullary junction
abducens nerve
emrgers at the cerebellopontine angle or the angle between caudal pons, rostral medulla and cerebellum
Facial nerve and Vestibulocochlear
the posterior surface of pons is limited lat by _____
superior cerebellar
peduncles
what divides the posterior surface of pons
medial sulcus or fissure of
SC and the medulla
elongated elevation at post pons lateral to the median sulcus; bounded laterally by the sulcus limitans
Medial eminence
Produced by root of facial nerve winding around the abducens nucleus; expanded inferior end of the medial eminence
Facial colliculus
found Floor of superior part of sulcus limitans
Substanstia ferruginea
Substanstia ferruginea is respo for what
attention, wakefulness and mood - norepi
Substanstia ferruginea is aka as
locus ceruleus
Produced by underlying vestibular nuclei and is lateral to sulcus limitans
Area vestibuli (vestibular area)
2 levels of internal pons
Transverse section through the caudal part passing through the facial colliculus
Transverse section through trigeminal nuclei
what can be found at Transverse Section Through Caudal Part
medial lemn
facial nuc
the medial lemn is accompanied by _____
spinal and lateral lemnisci
medial lemn will higa then is accompanied by _____
spinal and lateral lemnisci or spinothalamic and auditory respectively
Lies posterior to the lateral part of the medial lemniscus
Facial Nucleus
Fibers of facial nerve wind around the abducens nucleus producing the ______
facial colliculus
found at the Transverse Section Through Caudal Part
MLF
medial vestib nuc
spinal nuc of trigeminal nerve and its tract
trapezoid body
basis
purpose of MLF
Main pathway connecting vestibulocochlear nuclei with nuclei controlling EOMs (oculomotor, trochlear, abducens)
conjugate eye movement
Superior part of lateral and the inferior part of the superior vestibular nucleus
Medial Vestibular Nucleus
Anteromedial aspect of inferior cerebellar peduncle
Spinal Nucleus of Trigeminal Nerve and its tract
Fibers derived from cochlear nuclei and nuclei of trapezoid body
Trapezoid Body
significance of trapezoid body
Crossing auditory fibers
what does basis contain
pontine nuclei
_____ terminate in pontine nuclei
corticopontine fibers of crus cerebri
found at the Transverse Section Through the Cranial Part
Motor Nucleus of Trigeminal Nerve
Principal Sensory Nucleus of Trigeminal Nerve
Superior Cerebellar Peduncle
Trapezoid Body Medial Lemniscus Spinal lemniscus
Lateral Lemniscus
Middle Cerebellar Peduncle (brachium pontis)
Motor fibers of trigeminal nerve travel _____ and exit on _____
anteriorly and anterior surface
On lateral side of motor nucleus of trigeminal
Principal Sensory Nucleus of Trigeminal Nerve
Principal Sensory Nucleus of Trigeminal Nerve continous inferiorly ______
with the nucleus of
spinal tract
Posterolateral to the motor nucleus of the trigeminal nerve
Superior Cerebellar Peduncle
Superior Cerebellar Peduncle joint by ________
anterior spinocerebellar tract
Lateral to medial lemniscus
Lateral Lemniscus
what is lateral lemn
ascending auditory tract from cochlear nuclei to inferior colliculus
largest cerebellar peduncle
middle
what does the brachium pontis carry (MCP)
pontocerebellar tracts
corticopontine
and towards cerebellum
contricopontomedullar
