medium · LSAT Reading Comprehension
In describing recent research on adult neurogenesis, the science passage reports that experiments with rodents and other animal models found that 'environmental enrichment' and 'physical exercise' both increased the generation of new neurons in the hippocampus. The passage cautions, however, that translating these findings into human therapies remains a long and uncertain path, and that human rates of neurogenesis are probably lower than those seen in rodents.
The passage mentions 'environmental enrichment' and 'physical exercise' primarily in order to show that:
- Human patients have already adopted exercise as an established therapy for recovering from strokes.
- Certain external interventions can boost the production of new neurons, at least in animal studies.
- Lifestyle changes are the only available means of treating Alzheimer's disease.
- Rodents and primates generate new neurons at identical rates.
- Physical exercise increases neurogenesis more reliably than environmental enrichment does.
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