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11e anatomical division of cerebellum - Coggle Diagram
11e
anatomical division of cerebellum
Physiological Anatomy
The cerebellum lies dorsal to the brain stem in the posterior (occipital) fossa.
On each side it is connected to the brain stem by 3 peduncles.
by inferior cerebellar peduncle (restiform body) to the medulla,
by middle cerebellar peduncle (brachium pontis) to the pons, and
by superior cerebellar peduncle (brachium conjunctivum) to the midbrain.
The cerebellum weighs only 10% as much as the cerebral cortex,
but its surface area is approx. 75% of that of the cerebral cortex.
Anatomical Divisions
Anatomically the cerebellum
is divided into:
two large laterally placed
cerebella hemispheres.
a small medial portion,
the vermis.
It is further divided into two parts by
posterolateral fissure into:
Flocculonodular lobe
– floccule and nodule
Corpus cerebellum
divided by
primary fissure into
Anterior lobe
lingula,
lbulus centralis and
culmen;
Posterior lobe
subdivides to:
a) Lateral part
ansiform
paramedian lobules;
b) Median and paramedian part
lobulus simplex,
declive,
tuber,
pyramis,
uvula and
parafloccule.
Phylogenetical Divisions
This is based on development of divisions/lobes of the cerebellum at different times during evolution.
Archicerebellum – flocculonodular lobe.
Paleocerebellum – entire anterior lobe and parts of posterior lobe (pyramis, uvula, parafloccule).
Neocerebellum – remaining parts of posterior lobe (declive, tuber, lateral ansiform, paramedian lobules)
Functional Divisions
Functionally the divisions/lobes are named according to the connections
they make with other components of the motor control system.
Vestibulocerebellum – vestibular apparatus.
Spinocerebellum – spinal cord.
Neocerebellum – cerebral cortex and pons.