Brainstem anatomy Flashcards
Anterior choroidal artery branches off what?
Middle cerebral artery
Anterior choroidal artery supplies
- optic tract
- choroid plexus in temporal horn of lateral ventricle
- thalamus/ hippocampus
Anterior Medulla components
- pyramidal decussation
- olive
- pyramid
- Anterior median fissure
Where does the Trochlear IV nerve emerge
groove beneath inferior colliculus
What interrupts the anterior median fissure?
pyramidal decussation in the caudal medulla
What nerve erupts from the anterolateral fissure on the anterior medulla?
Hypoglossal XII
What nerves erupt for the post olivary nucleus?
IX, X
The posterior columns on the medulla end where?
Gracile + Cuneate tubercles (nucleus)
The sulcus limitans separates…
Sensory (lateral) and motor (medial) components
Where does CN V errupt
Lateral of middle cerebellar peduncle (pons)
CN VII + VIII emerge
Cerebellar-pontine angle
Involved in visual fixation and eye movement
superior colliculus (direct input from retina)
Involved in auditory system
inferior colliculus
Where does oculomotor III emerge
interpeduncular fossa
What does the inferior brachium do?
Carry fibers from inferior colliculus to median geniculate as part as ascending auditory system
All cranial nerve nuclei are located in the
tegmentum
Another name for tissue posterior to ventricle
tectum
What tract carries pain and temperature
spinothalamic tract
in what direction does the corticospinal tract go
descending
At what level does the spinothalamic tract meet up with the medial lemniscus
pons—> travel together into the thalamus
Where is the spinal trigeminal nucleus located
-lishowers tract and substantia gelantinosa also sit here
caudal medulla posteriolaterlly
mediates pain and temperature in the face
Spinal trigeminal nerve
What structures do internal arcuate fibers connect
medial lemniscus to nucleus gracilis and cuneatus ( 2nd order neurons)
where is the medial longitudinal fasiculus located while in the caudal medulla
on top of (posterior) to the medial lemniscus
medial longitudinal fasiculus function
coordinate eye movement
At caudal medulla level where is the lateral cuneate nucleus located and what is its function
located in the fasiculus cuneatus and its function is arm propioception
Hypoglossal nerve nucleus location
Rostral medulla posterior to medial longitudinal fasiculus
After termination the fasiculus cuneatus and gracilis continue as
medial lemniscus
Pyramids
rostral medulla
pyramidal decussation
caudal medulla
central canal
caudal medulla
4th ventricle
rostral medulla
inferior olivary nuclei
rostral medulla
internal arcuate fibers from inferior olive to inferior cerebellar peduncle
rostral medulla
location of oculomotor nerve nucleus
rostral modbrain
termination of longitudinal median fasiculus
rostral midbrain at oculomotor nerve nucleus
peri-aquaductal gray
rostral midbrain
surrounds fourth ventricle
pain modulation
substantia nigra
located posterior to cerebral peduncle
-parkinsons develops upon degradation
