Mod 7 Flashcards
(38 cards)
What are the three functions of the brain stem?
Provides transit for ascending and descending pathways
Regulates/controls basic vital functions of the body
Sub serves cranial nerves [CN] functions; houses CN nuclei
What are the brainstems transit roles
Sensory- spinal cord to the thalamus
Motor - cortex to the spinal cord
What are the vital functions of the brainstem
Respiration, heart beat, equilibrium
centers that determine level of activity of cerebrum and control sleep cycles of the body
True or false
The CN enter and exit from the brainstem at various levels from the midbrain down through the medulla
True
There are two types of CN nuclei that are located in the brainstem, what are they
the sensory nerve nuclei of termination–> the cell bodies of incoming first order sensory neurons
Motor nerve nuclei of origin –> the cell bodies of outgoing peripheral motor nerves (final common path
What are the four regions of the brainstem?
Roof, Basilar portion, tegmentum , ventricular cavities
What is the posterior or dorsal boundary of the brainstem
The roof
In the midbrain, what is the roof
Tectum
In the Pons, what is the roof
Cerebellum
At the level of the lower Pons and the medulla, what is the roof
the choroid plexus (on the floor of the 4th ventricle
What two nuclei are present in the tegmentum that are important to the basal ganglia function? What are their functions
Red nucleus –> functions with BG and cerebellum to coordinate muscle movement of the body
Substantia nigra–> functions with the BG in control of unconscious movements of the body
What serves as a relay station for signals from cerebellum that are going to the thalamus and cerebrum?
Superior tegmentum
What connects the 3rd and 4th ventricles
The aqueduct of Sylvius
Where is the midbrain located
Between the diencephalon and the pons
Where do the oculomotor and trochlear motor nerves exit at the brainstem
Midbrain-pons junction
Where is the corpora quadrigemina located
On the dorsal surface of the midbrain
The superior and inferior brachia connect ___ with ___
Colliculi with the thalamus
The root of CN IV (trochlear) exits at the ____ aspect
Dorsal
What is located between the midbrain and medulla?
Pons
The pons forms the _____ of the metencephalon
Basilar portion
What are the important CN nuclei at the pons level?
CN V - trigeminal
CN VI - abducens
CN VII- facial
CN VIII- vestibulocochlear
The ____ is the CN nuclei that main sensory nucleus is touch
Trigeminal: CN V
CN ____ has motor innervation for eye movement
CN VI: abducens
True or false: CN VIII (vestibulocochlear) has to do with motor movement to the facial muscles
False; vestibulocochlear = hearing and balance.
CN VII: facial = motor movement to facial muscles.
