I can loose my vocabulary completely. It happens during emdr and/or when trying to process a memory. Sometimes I just have to sit there and wait for the words to come back. I can stutter and stammer around. Early on I would dissociate, but now I am acutely aware I can't formulate a sentence. It totally sucks... I am able to come out of it more quickly, but it is still mind boggling how I can go from a functioning adult to a non verbal adult in 3 seconds.