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cerebellum |
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cerebellumPart of the brain of vertebrate animals which controls muscle tone, movement, balance, and coordination. It is relatively small in lower animals such as newts and lizards, but large in birds since flight demands precise coordination. The human cerebellum is also well developed, because of the need for balance when walking or running, and for finely coordinated hand movements. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Clinically, patients with cerebellar disease and anterior lobe atrophy show antero-posterior sway, often with a spontaneous high-frequency body tremor of around 3 Hz (Diener et al. In contrast, patients with midline cerebellar disorders, such as anterior lobe atrophy, often show hypermetric postural responses in which each EMG burst is too large and too long, resulting in falls in the direction opposite to the direction of perturbation. 2) Anterior lobe (paleocerebellum or spinocerebellum) and midline disease impairs lower-limb coordination, equilibrium responses, and head and trunk synergy, whereas lateral lobe disease chiefly affects limb coordination. |
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