Question

3. Aging also occurs during adulthood. Key developmental changes occur in and hearing. Hearing sensitivity isn't noticeable until after age and is greater in than . Women experience the ending of the menstrual periods and loss of fertility around age . Males experience a decline in in middle age. In the brain, the amount of brain_ and the brain's gradually decline, especially after age 60 which is due to a decrease in active neurons and neuronal shrinking. Dementia, defined as __marked by multiple cognitive deficits that include memory impairment, occurs in of people over age 75. There are also cognitive changes, including changes in _ which involves our basic reasoning abilities, memory capacity and speed of information processing. 4. Describe the use it or lose it hypothesis:

Answer 1

4. Use it or lose it hypothesis :

The use it or lose it hypothesis explains the occurrence of memory and cognitive deficits associated with aging. Recent studies provide evidences that reinforces the plasticity of the brain; the brain evolves with new experiences even in old age. If the brain is functioning at an optimal level, the chances of developing memory and cognitive deficits can be reduced. When the brain is idle, the memory paths and the cognitive traces are lost often resulting in dementia or Alzheimer's during the old age.