unit 7 Flashcards
What is the definition of life expectancy?
Life expectancy is the number of years an individual born in a particular year can expect to live, starting at any age.
What factors contribute to the dramatic gains in average life expectancy?
Improved nutrition, medical treatment, sanitation, and safety are factors that contribute to increased life expectancy.
What is healthy life expectancy?
Healthy life expectancy is the number of years a person born in a particular year can expect to live in full health, without disease or injury.
What are some of the key physical changes that occur in the nervous system during late adulthood?
Neuron loss occurs throughout the cerebral cortex, with greater shrinkage in the frontal lobes and corpus callosum; the cerebellum and hippocampus also lose neurons. However, the brain can compensate by forming new synapses and, to a limited degree, generating new neurons.
What are some common vision problems in late adulthood?
Cataracts and macular degeneration are common vision problems in older adults.
How does hearing change in late adulthood?
Older adults commonly experience a loss of ability to hear high-frequency sounds, difficulty with word discrimination, and problems hearing under noisy conditions.
What sleep changes are common in late adulthood?
Older adults find it harder to fall asleep, stay asleep, and sleep deeply. They also tend to have earlier bedtimes and waking times.
What is the difference between primary and secondary aging?
Primary aging refers to genetically influenced declines that affect all members of our species, while secondary aging refers to declines due to hereditary defects and negative environmental influences.
What is frailty in older adults and what contributes to it?
Frail older adults have extreme infirmity, wasted muscle mass, severe mobility issues, and potentially cognitive impairment. While primary aging contributes, secondary aging through genetic disorders, unhealthy lifestyle and chronic disease plays a larger role.
What are the main characteristics of Alzheimer’s disease?
Alzheimer’s disease is a severe form of dementia characterized by subtle memory difficulties, repetitive conversation, disorientation, and eventually, the failure to recognize family or perform routine tasks. It includes neurofibrillary tangles and plaques in the brain.
What is selective optimization with compensation in the context of cognitive development?
It refers to older adults narrowing their goals, selecting personally valued activities, and finding new ways to compensate for losses.
How does memory change in late adulthood?
Memory failure increases, especially on explicit memory tasks. Recall of context, source, and temporal order of events declines, while automatic forms of memory suffer less.
What are associative memory deficits?
They refer to the difficulty in creating and retrieving links between pieces of information. Older adults perform worse on tests that require association of items.
What is the reminiscence bump?
The reminiscence bump refers to the tendency for older adults to have their best recall for events that occurred between the ages of 10 and 30.
How does prospective memory change in late adulthood?
Older adults do better on event-based prospective memory tasks than on time-based tasks. They also tend to use external memory aids.