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John Usher (30)

Planning and Moving Frontal Lobe.docx

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PSYC 3325
John Usher

Planning and Moving: Frontal Lobe ● principle function is movement but also related to planning, changing strategies, being aware of oneself, evaluating emotionally related stimuli, and performing variety of spontaneous behaviours, and contains region involved in control of speech  damage to primary motor cortex produces paralysis of opposite side of body  damage to prefrontal cortex produces complex behavioural defecits:  slowing of thought and behaviour and loss of spontaneity ■ person will react to events in environment but will show defecits in initiating behaviour – cannot write as many words as possible, only a few, even though has no problem understanding words or identifying objects by name  preservation ■ damage to frontal lobes causes difficulty changing strategies – fail to abandon strategy when solving task, even if that one isnt working  loss of self-awareness and changes in emotional reactions ■ bland personality – seem indifferent to events that would normally be expected to affect them emotionally; little insight into their problems and are uncritical of their performance on various tasks; not bothered by pain althoguh can feel it  deficiencies in foresight and planning ■ may perform well on test of intelligence but unable to keep job ■ planning is related to motor functions of frontal lobes – cannot imagine something they might do so do or say things with unfavourable consequences because they have lost ability to plan actions ● Paul Broca – found that damage to region in left frontal lobe disrupts speech; region lies just in front of “face” region of primary motor cortex  Broca's - controls muscles used for talking  circuits of neurons in that area contain memories of sequences of muscle m
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