easy · 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 aerobic exercise as an established clinical therapy for stroke recovery.
- Certain external interventions can boost the production of new neurons, at least in animal studies.
- Lifestyle changes are the single available means of treating Alzheimer's disease in human patients.
- Rodents, primates, and humans all generate brand-new neurons at essentially identical baseline rates.
- Physical exercise reliably increases hippocampal neurogenesis far more than environmental enrichment does.
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