Cerebellum Flashcards
(38 cards)
Through lesion studies, the cerebellum has been ascribed the basic function of (3)
- Smoothing and sequencing of complex movements.
- Supporting postural adjustments and eye movements.
- Playing role in establishing and modifying motor programs.
The function of the cerebellum can be attributed to interactions with the (4)
- Ascending sensory pathways
- Vision
- Vestibular Function
- Cortical plans of movement
The functions of the cerebellum can further be described as
- Providing a comparison of internal and external feedback
- Modifying central motor programs
- Providing a center for motor learning or memory.
The cerebellum can be divided into what three lobes:
- Anterior
- Posterior
- Flocculonodular
T/F: The cerebellar lobes are somewhat consistent with functional division.
True
T/F: Cerebellar lobe description is purely anatomical and the general intrinsic pattern of connections is different in all lobes.
False:
Cerebellar lobe description is purely anatomical and the general intrinsic pattern of connections is the SAME in all lobes.
It is important to under stand the the cerebellum runs under powerful (INHIBITORY/EXCITATORY) control.
inhibitory
Release of inhibition of the cerebellum allows for
normal patterned movement to occur
Where are the cerebellar tonsils located?
externally on the posterior edge of the cerebellum (rounded “shelf”)
What is the structural significance of the cerebellar tonsils?
connections of the cerebellum
What is the clinical significance of the cerebellar tonsils?
An increase in intracranial pressure in the posterior fossa can force the cerebellar tonsils though foramen magnum pinching the the medulla.
What would pressure on the medulla due to cardiovascular and respiratory centers?
Respiratory arrest is the cessation of normal breathing due to failure of the lungs to function effectively.
Cardiac arrest is a sudden stop in effective blood circulation due to the failure of the heart to contract effectively or at all.
Where are the neurons responsible for output of the cerebellum located?
deep cerebellar nuclei.
Where are the deep cerebellar nuclei located?
lie in white matter of the cerebellum, deep to the cortical circuitry
What are the three deep cerebellar nuclei?
- Fastigial Nucleus
- Interposted Nucleus (interpossitus n.)
- Dentate Nucleus
Select the proper layer of the Cerebellar Cortex:
Sparsely populated layer of very large neurons.
a. Molecular Layer
b. Mid Layer
c. Granular Cell Layer
b. Mid Layer
Select the proper layer of the Cerebellar Cortex:
Outermost layer.
a. Molecular Layer
b. Mid Layer
c. Granular Cell Layer
a. Molecular Layer
Select the proper layer of the Cerebellar Cortex:
Basically acellular
a. Molecular Layer
b. Mid Layer
c. Granular Cell Layer
a. Molecular Layer
Select the proper layer of the Cerebellar Cortex:
Innermost layer
a. Molecular Layer
b. Mid Layer
c. Granular Cell Layer
c. Granular Cell Layer
Select the proper layer of the Cerebellar Cortex:
Contains purkinje cells
a. Molecular Layer
b. Mid Layer
c. Granular Cell Layer
b. Mid Layer
Select the proper layer of the Cerebellar Cortex:
Made up of many granular cells
a. Molecular Layer
b. Mid Layer
c. Granular Cell Layer
c. Granular Cell Layer
Select the proper layer of the Cerebellar Cortex:
Made up of axons and dendrites
a. Molecular Layer
b. Mid Layer
c. Granular Cell Layer
a. Molecular Layer
Select the proper layer of the Cerebellar Cortex:
Received the majority of input from the afferent systems, mossy fibers.
a. Molecular Layer
b. Mid Layer
c. Granular Cell Layer
c. Granular Cell Layer
Select the proper layer of the Cerebellar Cortex:
The axons of this layer form the majority of the axons in the molecular layer and synapse on the dendrites of the purkinje cells.
a. Molecular Layer
b. Mid Layer
c. Granular Cell Layer
c. Granular Cell Layer