动态不稳定性（Dynamic instability）是微管动态特征的表现，是微管迅速伸长和迅速缩短的现象。

Dynamic instability (动态不稳定性)

This rapid interconversion between a growing and shrinking state, at a uniform free subunit concentration, is called dynamic instability. It is a property of the plus end of the microtubule, subunits are added to the plus end during growth and lost from the plus end during shrinkage.

这种生长状态和收缩状态之间的快速转换，在一个统一的自由亚基浓度下，被称为动态不稳定性。它是微管正端的一种特性，在生长过程中，亚基被添加到正端，在变短过程中从正端丢失。

The change to rapid growth is called rescue.

快速增长被称为微管复原。

The change to rapid shrinkage is called catastrophe.

快速缩短被称为微管骤变。