Ischemic penumbra

@article{Hakim1998IschemicP,
  title={Ischemic penumbra},
  author={Antoine M. Hakim},
  journal={Neurology},
  year={1998},
  volume={51},
  pages={S44 - S46}
}
The concept of ischemic penumbra has extended our understanding of the focal ischemic process and in many ways has revitalized our research. Simply stated, the penumbra is the part of the brain that is sandwiched between brain regions committed to die and those that receive enough blood to communicate. Therefore, it is ischemic brain tissue that has just enough energy to survive for a short time but not enough to communicate and function. The life expectancy of the penumbra is short. Although… 
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