DEP 2004 Lecture Notes - Lecture 14: Descriptive Knowledge, Prefrontal Cortex, Cardiovascular Disease
Document Summary
Ch 14 perceptual & motor changes in late adulthood. Changes in ability due to illness which arise with advanced age. Gradual decline (physical, motor, health, cognitive, sensory) Collagen (elasticity of skin) decreases in skin by 1% per year beginning at 20. Gray hair: decrease in pigment cells by age 30. Ex: liver stores glycogen declines (relates to metabolism) Vision - 10% in late adulthood can see without correction. Presbyopia - change in lens shape; difficult to focus close up. Cataracts - clouding of lens; difficult to see; low vision . Can be primary or secondary aging effect. Lens becomes thicker overtime and somewhat cloudy (light cannot pass through lens and leads to low vision ) Glaucoma - optic nerve degeneration which can lead to blindness if untreated. Ex: diabetes (chronic high blood sugar levels) causes damage to sensory nerves of body. Macular degeneration - loss of photoreceptors in fovea (center of eye) Hearing - fairly common loss over age 65.
