Cerebellum 2
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| What are the functions of the spinocerebellum? | Execution of limb movement, fine tuned motor control, muscle tone influence, corrects for deviations in intended movements. | |
| What are the afferents/inputs to the spinocerebellum? | Somatosensory, motor, visual, auditory, vestibular, and spinocerebellar tracts. | |
| What are the efferents/outputs from the spinocerebellum? | The interposed nucleus (limbs) and the fastigial nucleus (muscle tone). | |
| What is the path of the efferent interposed nucleus? | To red nucleus, down rubrospinal tract to spinal cord or to the cortex via the ventral lateral thalamus to the primary motor cortex and premotor cortex to influence the corticospinal tract. | |
| What is the path of the efferent fastigial nucleus? | To the vestibular nuclei to influence the vestibulospinal tract or to the reticular nuclei to influence the reticulospinal tracts (especially the medullary tract). | |
| What are the functions of the cerebrocerebellum? | Precise rapid limb movement through regulation of agonist-antagonist timing, augmentation of tasks requiring dexterity, movement initiation, and motor learning (red nucleus). | |
| What are the afferents/inputs to the cerebrocerebellum? | Primary motor cortex, primary sensory cortex, premotor cortex, and posterior parietal cortex. | |
| What are the efferents/outputs from the cerebrocerebellum through the superior peduncles? | The dentate nucleus and the red nucleus. | |
| What is the path of the efferent dentate nucleus? | Dentate nucleus to ventral lateral thalamus to motor cortex to premotor cortex. | |
| What are the two main roles of the premotor cortex? | Help motor cortex time fast, rapid, alternating movements and help in initiation of movement, cue to start a movement. | |
| What is the path of the efferent red nucleus? | Red nucleus to inferior olivary nucleus, climbing fibers arise from the olive and excite purkinje cells which inhibit deep cerebellar nuclei. |
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