degenerating

“All of this has been degenerating for a long time,” Melgar said.

They quickly discovered a waste-internalizing glial canal system that undergoes structural abnormalities in degenerating spider brains, which leads to uncontrolled depletion and death of brain cells.

The incident was followed by a week of protests in suburbs around Paris, many degenerating into violence.

In many neurodegenerative diseases such as Alzheimer's and Parkinson's, the neurons start degenerating at a very early stage -- sometimes years before other brain regions begin to falter.

They also looked at the fly equivalent of microglia, called ensheathing glia, whose primary function is to remove neural debris, such as degenerating axons.