129. Cerebellum – Microscopic structure of the cortex.
Covers the topography and external features of the cerebellum, including its position in the posterior cranial fossa, its connections to the brainstem through the peduncles, and its role in muscle tone, posture and coordinated movement. It describes the division into two hemispheres joined by the vermis, the folia, and the anatomical division into three lobes and two surfaces, with diagrams. The microscopic structure of the cortex is not covered in the text.
Topic 128 of 236 in the MU Pleven syllabus for Anatomy Bones and Muscles (Medicine, Year 2). The free AceMed note covers it in 3 sections, about 154 words (1 min of reading), with 10 flashcards.
In this note
CEREBELLUM
Topography:
External features:
Topography:
It is the largest part of the hindbrain.
It is present in the posterior cranial fossa, below the cerebral hemispheres, separated from them by dural fold " tentorium cerebelli "
It lies posterior to pons and medulla oblongata with the 4th ventricle intervening.
It communicates with the brainstem through the cerebellar peduncles.
Function: regulation of muscle tone, maintaining equilibrium & posture, and coordination of voluntary movements.
There are 8 lobules within the vermis, the lobules of the cerebellar hemispheres generally correspond to the ones of the vermis:
Sup.
Inf.
External features:
It is formed of 2 cerebellar hemispheres connected by the vermis.
The surface of the cerebellum is indented by numerous parallel fissures " folia cerebelli "
→ Anatomical division:
3 lobes: Anterior, posterior & folocculonodular — separated by the primary fissure / separated by posterolateral fissure
2 Surfaces: Superior & inferior separated by the horizontal fissure.
Sup. / Inf. - horizontal fissure
→ Functional division
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