impair

As dopamine-producing brain cells die, movement becomes affected, resulting in tremors, muscle stiffness, slowed movement and impaired balance.

Flies with the defective gene exhibited behaviors consistent with inner ear dysfunction, such as impaired hearing and balance issues.

"For hard of hearing people, phone banking is challenging, and for visually impaired people, online banking can be really difficult," Miss Kinsella added.

The cafeteria diet alone did not greatly impair spatial learning or recognition memory, but exercise slightly improved navigation skills.

And they argue this “modest, modern” limit make sense because well-armed drug addicts “present unique dangers to society — especially because they pose a grave risk of armed, hostile encounters with police officers while impaired.”