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aging - Lecture 2

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University of Toronto St. George
Alison Smith

Lecture 2 – HLTB01 | November 3, 2008 (Aging of the Internal Organs, Chapter 7) Current Events - Regulatory system tries to show problems as you age - Sedentary youth is a problem, shouldn’t be blaming youth for inactivity instead - Should have good dietary habits from early on- cholesterol, health and heart - Very important to be conscious of stress levels, exercise, but to understand interplay between internal environment and external environment - Homeostasis= balance, body has own internal way to adapt to change and regaining sense of balance - Sensory system- touch, taste, vision, hearing,smell (important in aging) Presbyopia- occurs in midlife, that causes nearsightedness ; can see from far but not from close up ; is NOT a disease of the eyes, it just is an alternation of the elasticity of the lens - As we age collagen stiffens, which reduces the ability for the pupil to enlarge, this process begins when you are 20 - Fluid in the eye shows change as well, problems with the tear gland , we have less protective fluid which is a lubricant, when too little fluid you can have dry eye symptom, corneal aberration, infection - A ventrious humour is like a peal of potatoes in eye, if a piece of it breaks out it causes a floater; looks like bug or skeleton of an amphibian and much more pronounced in light , you can get flashing lights when you get this - Optometrist = not studied medicince, optometry is a 4 years school, like chiropractors call themselves doctors, they call themselves that too, they cannot perform surgery and diagnose certain procedures, but they can prescribe glasses, and detect problems to refer to doctors, they are not covered by OHIP - Opthamologist= medical doctor/ eye surgeons, diagnose disease of eye, are covered by OHIP - Rods and cones relate to retina, because there are alterations that do happen - Common disease for eyes- cataracts (your lens get covered, we replace it today, causes clouded vision) - Central vision loss : macreal degeneration is the loss of your central vision - Glycoma, more watery eyes, diabetes causes diabetic retinalopathy - Legislation itself – highway traffic act section 203 and 204 make it a requirement for an optometrist or a medical practioner to report a medical problem or any other problem that affect the ability for individuals to drive - Frontal lobe – filter of brain, gives ability to prevent yourself from saying things you think, behaviour comes altered when that is damaged - Cerebral Vascular Accident(CVA)- can result from a skemic? Problem, same way that we have heart attacks (myocardiac bla) sudden alterations to blood flow to the brain thats way its called an attack to the brain when you talk about stroke - Hypertension, alterioscelorosis, are dangerous to damage to the heart , which impairs not only the heart but also the other organs of the body and also impair the brain - Left hemisphere is for language, right side is spatial - Stoke – is lamens term for CVA - Left hemi- talking about the left side of the body is paralysed that means the right side of the brain is affected - Hemorragh we have surgery Video 1 - Each region is connected by white matter, where networks pass from one place to another - Break down of white matter is what contributes to aging - 93 people aged 18 – 93, older people were given more tests to measure mental abilities, younger people their brain thought were in sync with each other, front and back part of brain were not in part in brain - Older people had syncrohnized brain but all have different things happening to different regions of the brain - - Empowered health news-you tube Video 2 - As we age senses of smelling diminishes, as much as 60% as we reach our golden years - Early 30’s smelled peaked to full potential but than on their was a gradual decline from the 40s and 50s , the nerve in the nose become narrower more difficult to detect smell - Smelling mechanism are more vulnerable to more viruses, - Anosmia- complete loss of ability to smell, conditi
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