easy · LSAT Reading Comprehension
In surveying recent work on adult neurogenesis, the passage turns to the question of what can encourage the brain to produce new neurons. It reports that, in animal models, two non-pharmacological factors—environmental enrichment and physical exercise—have been shown to increase the rate at which new neurons form. These results, the passage notes, parallel the effects of certain pharmacological agents, though it does not rank one approach above the other.
The passage mentions 'environmental enrichment' and 'physical exercise' primarily in order to:
- account for the high rate of neurogenesis observed during early human childhood and adolescence
- offer examples of non-drug methods shown to stimulate the formation of new neurons in animal studies
- contend that lifestyle changes reliably outperform pharmaceutical treatments at promoting neurogenesis
- identify the only two methods so far proven capable of fully curing Alzheimer's disease in patients
- establish that aerobic exercise by itself can completely reverse age-related neuron loss in adult humans
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