To move you must apply a brake to some postural

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Unformatted text preview: In such a complicated system, it is apparent that small disturbances can throw the whole system out of whack, often in unpredictable ways. The deficits tend to fall into one of two categories: the presence of extraneous unwanted movements presence or an absence or difficulty with intended movements. Lesions of the Basal Ganglia Lesions Parkinson's disease, results from the slow and steady loss of dopaminergic dopaminergic neurons in Substantia nigra pars compacta (SNpc). neurons Substantia pars compacta ). The three symptoms usually associated with Parkinson's are tremor, rigidity, and bradykinesia. tremor rigidity and bradykinesia The tremor is most apparent at rest. Rigidity is a result of simultaneous contraction of flexors and extensors, which tends to lock up the limbs. Bradykinesia, or "slow movement", is a difficulty Bradykinesia or initiating voluntary movement, as though the brake cannot be released. Amygdaloid nucleus Amygdaloid at the tail end of the caudate nucleus; involved with reactions to reward and pleasure, sexual activities, tonic movements like movements raising your head. raising Amygdala Am Diencephalon Diencephalon Consists of the Thalamus, Hypothalamus and Epithalamus Epithalamus Thalamus Thalamus Makes up 80% of the diencephalon diencephalon Two large gray masses connected by the connected intermediate mass Contains many nuclei Contains Projects fibers to and from the cortex from Sorts and edits info. headed for the cortex intermediate headed intermediate Directs info. to proper mass of cortical region thalamus cortical thalamus thalamus The Diencephalon The Hypothalamus Hypothalamus Initiates physical expression of emotions (linked to the limbic system) the Regulates thirst, food intake, body temp., sexual behavior, pleasant and painful feelings, pleasure, fear, rage fear, Regulates autonomic centers in the brain hypothalamus hypothalamus stem controlling B.P., digestive rate, respiration rate respiration The Diencephalon The Hypothalamus Hypothalamus Infun...
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