1. The Cerebellum

2. Position
Cerebellum
Lies above and behind the medullar and pons and occupies posterior cranial fossa

3. Three functional divisions
Vestibulocerebellum
Flocculonodular lobe
Spinocerebellum
Vermis and intermediate zone
Cerebrocerebellum
Lateral zone
Vermis
Intermediate zone
Lateral zone
Flocculonodular lobe

4. function of cerebellum
Vestibulocerebellum
involved in eye movements and maintain balance
Spinocerebellum
play an important role in control of muscle tone and coordination of muscle movement on the same side of the body
Cerebrocerebellum
participates in planning movements

5. Functions of the Cerebellum
Motor learning/adaptation
Non-motor functions:
Active tactile exploration
Higher brain functions (cerebellar cognitive-affective syndrome)

6. Conclusions Cerebellar lesions produce Motor learning
Incoordination & errors not weakness
Lose ability to anticipate errors
Lose ability to correct
Motor learning
Requires sensory awareness
Implemented via the descending cortical and brain stem pathways
Cognitive and emotional disturbances
Anatomical connections to prefrontal and cingulate cortex (via thalamus)
No single function
Clearly mostly motor; learning, optimizes
Functions may apply to cognitive and emotional behaviors

7. Cerebellar Signs Hypometria & Response delays Ataxia
Incoordination/ rapid alternating movements (disdiadocho- kinesia)