1. laboratory investigations of rodents and the knowledge of rodents it seems that we
2. neurobiology of the central nervous system would all be well-served from studies of
3. (CNS) reflects to a considerable extent a these natural populations by monitoring
4. dependency on these investigations. e.g. CNS alterations caused by exposure to We have historically treated rodents chemicals dispersed in the environment.
5. outside of the laboratory as pests to be con- Such an ecotoxicological approach using