Lecture+15+Sensory+Motor - Sensory and Motor Systems...

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1 Sensory and Motor Systems Sensory/motor systems function together Sensory/motor information is integrated at various places in the CNS This information is key for perception and movement and also cognition Peripheral nerves: sensory and motor function in arms/legs Sensory function changes considerably with age Common Causes : Diabetes Peripheral vascular disease Alcoholism Thyroid disease Vitamin Deficiency Age (without diseases!)
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2 Stimulate Record Distance nerve Stimulating and recording electrodes on a peripheral nerve are a known distance apart. Distance/Time = Velocity Nerve conduction velocity declines with age This decline is accelerated by a variety of factors, especially diabetes, toxins, vascular disease This affects both motor and sensory nerves Sensory Loss with Age - Special Senses Vision Loss of contrast sensitivity Special problem for night vision Hearing Loss of high frequency perception Olfaction Diminished sense of smell May affect appetite
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Age Related Macular Degeneration (AMD) 90% of severe vision loss from AMD Loss of independence Reading Ambulation Recognizing faces Clinical depression in up to 1/3 of patients AMD – A Major Public Health Issue Most common cause of blindness in the developed world 200,000 new cases/year in U.S. 1.6M total U.S. cases with late AMD
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Lecture+15+Sensory+Motor - Sensory and Motor Systems...

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