"lose equilibrium" is correct and can be used in written English.
It typically means to lose a sense of balance, stability, or sense of control. For example, "When the stock market suddenly shifted, many investors began to lose equilibrium."
He had lost equilibrium and some of his speech abilities.
As law enforcement officials and terrorism experts cast about for clues, news employees are trying to recapture their lost equilibrium -- with mixed success.
Belgian Tintin expert Philippe Goddin summarized: "[Hergé] sought to regain a lost equilibrium, that he imposes on his hero a desire to seek purity ... considering it necessary for Tintin to go through the intimate experience of distress and loneliness ... and discover himself".
We then recorded the time until the salamander larvae lost their equilibrium posture as a measure of low-oxygen tolerance (loss of equilibrium precedes death; individuals that lost equilibrium were removed from the tank and allowed to recover in tap water saturated with oxygen).
Sampling proceeded once the fish had lost equilibrium and ceased ventilation (∼2 min).
As soon as an individual lost equilibrium, it was euthanized in MS-222 and recorded as a temperature-sensitive individual.
People are motivated to obtain and protect their resources, which is why when imbalances are perceived between investments made and benefits obtained in return, people will react by trying to re-establish the lost equilibrium.
"Stoffregen says because you lose your equilibrium, you get motion sick".
"Seize opportunities to reflect on life -- your life and the lives of others," Professor Emery suggests, "and you will be far less likely to lose your equilibrium.
