| 摘要 |
A method for extracting at least a sample of the brain stem of an animal for testing is carried out using a metal tool having a tubular handle portion of the metal body and a part tubular operating portion of the metal body defini ng a blade and scoop, inserting the operating portion while holding the handle in to the cranial cavity of the head of the animal through the foramen magnum, rotatin g the tool to sever the cranial nerves and withdrawing the tool with the brain ste m cradled in the operating portion.
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