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UIUC PSYC 210 - Cerebellum and Movement Notes

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Cerebellum and Movement Cerebellum: receives information from the sensory systems, the spinal cord, and other parts of the brain and then regulates motor movements. It coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activities.**Basic coordination of limbs, balance, eye movement, and muscle tone. **Provides smooth coordinated body movements *Do not look like robots when move but have fluid muscle movements** Receives / integrates sensory and motor informationCan be broken down into three-four categories. Flocculonodular lobe- Deals with vestibular control. Vestibular control deals with our balance and spatial orientation with the purpose of coordinating movement with balance. Vermis & Anterior Lobe- Deals with motor coordination and limb control. Posterior Lobe- Deal with initiation and planning as well as timing. Cerebellum Layers: three layers- molecular, purkinje, granular Molecular layer- top layer contains flattened dendritic trees of the purkinje cells Granular layer- contains granule cells. Granule cells project into the molecular layer and forming parallel fibers. Parallel fibers are long lateral projects that form excitatory synapses of the dendrites of purkinje cells. Purkinje layer- Contains purkinje cells.Purkinje Cells- Form large planar dendritic trees in molecular layer. Guide movement by inhibiting neurons. Acts as the only output of the cerebellumCerebellum Inputs: Climbing Fiber and Mossy Fiber Climbing Fiber- Form many synaptic connections with 1-10 purkinje cellsMossy Fiber- Form synaptic contact with many granule


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UIUC PSYC 210 - Cerebellum and Movement Notes

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