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Motor syste4 - Motor system basal ganglia and cerebellum...

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Motor system: basal ganglia and cerebellum Signs and symptoms When presented with case studies detailing symptoms caused by damage to nervous system, start by taking a look at the symptoms & from the Neuro point of view ask the following questions: Are there motor deficits? o Yes = Damage to DESCENDING tracts o Identify tract(s) responsible for damaged motor function o Are tracts Pyramidal/Extrapyramidal? Do the symptoms fit? o Are there UMN/LMN signs? Are there sensory deficits? o Yes = Damage to ASCENDING tracts o Identify tract(s) responsible for damaged sensation o Knowledge of where tracts START, TRAVEL & END will help locate lesion site Are there cognitive deficits? o Yes = Damage occurring within/affecting the BRAIN (probably) o Identify regions involved in coordinating behaviour that has been damaged/affected o Look for other signs that may narrow down region of interest Where do the deficits start/end? o If symptoms in TORSO/LIMBS, map onto DERMATOME/MYOTOME diagrams o EXTENT & whether MOTOR/SENSORY/BOTH damaged gives idea about whether site is CENTRAL/PERIPHERAL & indicate where lesion might be Which side of the body are they on? o Indicates which side of the nervous system affected ---- IPSI-/CONTRALATERAL If both motor & sensory deficits are present, are they on the same side?
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