Bell palsy (a type of neuritis) paralyzes the muscles of one side of the face. Muscular dystrophy causes paralysis by attacking muscle.

贝尔氏麻痹(神经炎的一种)引起面部一侧的肌肉瘫痪。肌营养不良侵袭肌肉也能导致瘫痪。

youdao

It can also make you somewhat expressionless since it paralyzes or weakens the muscles that cause those expressive facial lines.

因为会有麻痹或减弱面部表情肌的功能，因此可能导致你有一点缺少面部表情。

youdao

The second is something called pancuronium bromide, and what that does is slowly paralyzes his muscles and his lungs.

NPR: Slate's Jurisprudence: Cruel, Unusual Injections?