KINESIOL 4SS3 Lecture Notes - Lecture 12: Thoracic Vertebrae, Vestibular System, Force Platform
19 Sep 2016
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Document Summary
Ability to maintain the body"s position over its base of support. Static balance: the control of postural sway during quiet standing: amplitude and frequency of postural sway increases with aging, exaggerated if standing on one foot or with eyes closed. Vision: age related changes affecting balance include. Decreased peripheral vision: contribute to postural sway. Vestibular system: vestibular neurons decrease in size and number after age 40 (40% loss in number by age 70) No direct relationship between loss vestibular neurons and perception. Not usually a reason for losing balance with age. Somatosensory system: cutaneous and muscle receptors, cutaneous sensation declines with aging. Numbness like after skating and feet cold. 2 prong test (move prongs closer and closer together: muscle proprioception (perception of mechanical displacement of muscles and joints) stays relatively constant. Lose perception that their arm is swaying beside them with age.
