Week 2: The Midbrain Structures Location and Functions Flashcards
The superior colliculi is located in the:
rostral tectum
The inferior colliculi is located in the:
caudal tectum
what structure is located specifically in the rostral tectum?
superior colliculi
what structure is located specifically in the caudal tectum?
inferior colliculi
what is the function of the superior colliculi?
it is a visual relay system
helps relay connections that correlate head and neck movements
what is the function of the inferior colliculi?
auditory relay station
helps relay connections from peripheral auditory structures to cortical auditory regions
What structures are located in the rostral tegmentum?
oculomotor (CN 3) nuclei
ventral tegmental area
red nuclei
what structures are located in the caudal tegmentum?
trochlear (CN 4) nuclei
superior cerebellar peduncle
raphe nuclei
What two structures located in the caudal tegmentum can also be located in the Rostral Pons?
superior cerebellar peduncle
raphe nuclei
where can i locate the raphe nuclei?
Caudal tegmentum and rostral pons
where can i locate the superior cerebellar peduncle?
the caudal tegmentum and the rostral pons
where can i locate the trochlear nuclei?
caudal tegmentum
where can i locate the oculomotor nuclei?
rostral tegmentum
where can i locate the red nuclei?
rostral tegmentum
where can i locate the ventral tegmental area?
rostral tegmentum
What is the function of the ventral tegmental area?
plays a role in reward system (reinforcing behavior) with projections to the limbic system and cortex
major dopamine producing area
Which structure plays a role in reward system and has projections to the limbic system and cortex?
ventral tegmental area
what are the 7 structures (that we have to identify) located in the tegmentum?
substantia nigra ventral tegmental area red nuclei oculomotor nuclei trochlear nuclei superior cerebellar peduncle raphe nuclei
what is the function of the substantia nigra?
major dopamine producing and storage area
The substantia nigra is a part of the _________ _________ and is involved in ___________.
basal ganglia; movement
The function of the red nuclei is:
motor coordination
motor control for flexor muscle groups
what is the function of the superior cerebellar peduncle?
it is relay station to the cerebellum
what is the function of the raphe nuclei?
Major serotonin producing neurons in the brain.
What structures are located in the basis pedunculi?
Crus Cerebri and the cerebral peduncle
The Cerebral peduncle is made up of the:
basis pedunculi and the substantia nigra
The function of the Crus Cerebri is:
large bundles of somatotopically organized axons containing fibers from motor pathways
The cerebral peduncle is located in the
basis pedunculi and the ventral tegmentum
what is the function of the cerebral peduncle?
contains large descending motor nerve tracts
The cerebral peduncles are ___ stalks that attach the cerebrum to the _________ at the ________surface of the membrane that arise from the ventral _____
2; brainstem; ventral; pons
Periaqueductal Gray is found in which two sections of the midbrain?
tectum and tegmentum
________ matter surrounds the cerebral aqueduct.
gray
The periaqueductal gray plays a major role in:
pain modulation (inhibition), autonomic regulation and emotion
