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2) The cerebellum

The motor regulator. 2) The cerebellum. Impact factor 4.8. Cerebellum - controls neural ‘programs’ for the executionl of skilled movements. Motor control systems outside the cortex. The Location of the Cerebellum: Midsagittal View. Atlas Fig. 2-30. Atlas Fig.2-37.

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2) The cerebellum

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  1. The motor regulator 2) The cerebellum

  2. Impact factor 4.8

  3. Cerebellum-controls neural ‘programs’ for the executionl of skilled movements Motor control systems outside the cortex

  4. The Location of the Cerebellum: Midsagittal View Atlas Fig. 2-30 Atlas Fig.2-37

  5. The Pons and Medulla Atlas Fig.2-20

  6. Cerebellar Peduncles Atlas Fig. 2-36, also see Text Fig. 27-1 Atlas Fig. 2-31

  7. Cerebellar Peduncles Text Fig. 27-1A Text Fig. 27-1B

  8. The Cerebellum – Mid-sagittal view Atlas Fig. 2-37 Atlas Fig. 2-37

  9. The Cerebellum – Superior View Atlas Fig. 2-36 Atlas Fig. 2-36

  10. The Cerebellum – Inferior View Atlas Fig. 2-36 Atlas Fig. 2-36

  11. Feed-back and feed-forward control circuits

  12. Feed-back and feed-forward control circuits By acting as a comparator By acting as a timing device By storing information

  13. Cerebellar connections • Input: • Sensory cortex (somato, visual) • Association cortex • Vestibular system • Spinocerebellar tracts • Output: • Motor cortex • Thalamus motor nuclei • Extra-pyramidal tracts • Association cortex

  14. The Cerebellar Cortex and Nuclei: Blood Supply, Zones, and the Concept of Compartments Text Fig. 27-5

  15. Cells/Fibers of the Cerebellar Cortex Basket cell, Stellate cell Climbing fiber Purkinje cell, Golgi cell Granule cell-parallel fiber Mossy fiber Multilayered fiber Text Fig. 27-9

  16. Synaptic Interactions Within the Cerebellar Cortex Text Fig.27-13

  17. Excitation-Inhibition in the Cerebellar Cortex Sustained activity Decreased activity Text Fig. 27-15

  18. The motor cerebellum functions

  19. The main functions of cerebellum: • body equilibrium • regulation of muscle tone • coordination of movements

  20. A t a x i a • means disturbances of equilibrium of the body and coordination of movements. • Cerebellum lesion produces cerebellar ataxia

  21. Cerebellar ataxia • Attactic gait – patient can’t to walk • Disorders of equlibrium – patient can’t to stand • Intention tremor – is dynamic tremor (it is more expressed while moving and disappears while rest) • Dysarthria • Nystagmus • Dysmetria (disturbed ability to gauge distances) • Dysdiadochokinesia (Awkward performance of rapid alternating movements)

  22. The Non-motor cerebellum functions

  23. VISCEROMOTOR FUNCTIONS dilated pupils flushed face decreases in heart rate and blood pressure.

  24. executive, visual-spatial, linguistic and affective deficits Mutism and impaired verbal fluency affective symptoms and personality changes Attentional and emotional problems

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