Cerebellum Flashcards
Cerebellum
3 layers Purkinje cells "Little cerebrum" Makes up about 50% of the neurons Volume is 10% of the brain NOT for sensation!!!
Tandem test
Test: walking in a straight line
For alcoholics
The patient has to be awake to test cerebellar function!
If you see the substantia nigra..what part of the brain?
Midbrain
If you see the third ventricle…
Thalamus!
If I see the 4th ventricle…
Pons, medulla
Roof of the cerebellum
Tentorium cerebelli
Uncal herniation
When uncus is going down where it should not be
Most medial portion of the temporal lobe
Structures above the dura: supratentorial
Structures below the dura: infratentorial
Origin of the cerebellum
Metencephalon
If there are lesions in the right cerebellum…
Problems in the right side
SAME SIDE!!!
Compared to cerebral cortex (contralateral)
2 deep fissures
Primary fissure
Posterolateral fissure
3 lobes
Flocculonodular
Anterior
Posterior
Most medial in the temporal lobe
Uncus
Structure pushed down when there is swelling in the cerebellum
Found near the foramen magnum
Patient could die because medulla is compromised (breathing)
Tonsil of cerebellum
Biggest one connected with cerebellum and pons
There are many fiber connections
Thick
Contains AFFERENT fibers!!!
Largest Lateralest Latest phylogenetically
Middle cerebellar peduncle
Higher cortical info
Connect cerbellum with midbrain
Contain mostly EFFERENT fibers
Superior cerebellar peduncle
Processed output travels
Connects cerebellum with the medulla and spinal cord
Contain BOTH afferent and efferent fibers
Inferior cerebellar peduncle
Peripheral information about the body enters the cerebellum through here
Exception!
Know about:
Vestibular system
Are there nuclear structures inside the brain?
Yes!
Subcortical neurons: basal ganglia, thalamus, caudate
Most impt letter in neuroanatomy?
C (Dentate nuclei)
Are there neuronal cells in the cerebellum?
White matter (medullary center)! Called cerebellar nuclei
All fibers going out in the cerebellum pass through the superior cerebellar peduncle but not all come in…
They pass through the ventral spinocerebellar tract
Tract
Fiber, white matter
Why ipsilateral?
Cerebro Cerebello Cerebral Circuit
Corticospinal tract
