The Cerebellum - * info to thalamus and brain stem * info...

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brain stem The Cerebellum ("little brain") * The cerebellum is involved in the coordination of movement * it compares what you thought you were going to do (according to motor cortex) with what is actually happening down in the limbs (according to proprioceptive feedback), and corrects the movement if there is a problem. * is also partly responsible for motor learning, such as riding a bicycle. * Unlike the cerebrum, which works entirely on a contralateral basis, the cerebellum works ipsilaterally . * The cerebellum operates in 3's: * there are 3 highways leading in and out of the cerebellum, * there are 3 main inputs, and * there are 3 main outputs from 3 deep nuclei. They are: CEREBELLAR PEDUNCLES * bundles of fibers connecting the cerebellum with the underlying brain stem * There are 3 pairs: * inferior- transmit info about ongoing movement from spinal cord * middle- sensory info from pons * superior-main output path
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Unformatted text preview: * info to thalamus and brain stem * info to red nucleus of midbrain (red nucleus relays info from cerebellum to spinal cord) The 3 deep nuclei are the * fastigial- is primarily concerned with balance , and sends information mainly to vestibular and reticular nuclei. * interposed , and dentate nuclei-are concerned more with voluntary movement , and send axons mainly to thalamus and the red nucleus. * Cranial nerve nuclei VIII-XII * The core of the medulla contains much of the reticular formation some of which influence the autonomic (visceral motor) functions * cardiac center- adjust the force and rate of heartbeat * vasomotor center- regulates blood pressure by controlling blood vessel dilation and constriction * medullary respiratory center- controls the basic rhythm and rate of breathing * additional centers regulate hiccuping, swallowing, coughing, and sneezing....
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