Can one remember after 'talking in sleep'?

A2A Really have no expertise on sleep etc. Talking in your sleep I think is vocalizing what you say in your dream, so is only remembered if wakened during this episode, otherwise would be forgotten, like most dreams are.

A2A We usually don't remember what we say in our sleep. The most common form of sleep-talking happens during deep sleep, and in this sleep we do not have vivid dreams, or at least memories do not continue into waking life. In adults this form of sleep-talking is most common early in the night. There is a second form of sleep-talking, which happens during vivid dream sleep (REM sleep). This is less common and can have medical causes. Dreams from this form of sleep carry over more easily to waking memory. This type of sleep-talking is not so common. To have conversations on the telephone or with a roommate and not remember them is usually not actual sleep-talking. What happens is that you are awake while you talk, but fall asleep before the memories have time to move to long-term memory. This is similar to how people forget what happened just before electroshock therapy or a severe concussion. We need a certain level of consciousness for our memories to become permanent. (For this reason it is normal and natural to lie awake a few minutes after going to bed. If you fall into deep sleep immediately, you forget the last 5 to 30 minutes of the day.) But when you are woken up suddenly from deep sleep, you may return to deep sleep right afterwards and forget what happened. Forgetting an answered phone call is not a problem. But if you call others in the night and don't remember it, and especially if they describe your personality as different from usual, you should visit a health professional.

I think you can remember what you spoke about in you sleep and I also think you can wake yourself up by sleep talking. The key to remembering your dreams is to write them down as soon as you wake. I have woken myself up singing a song I wrote in my sleep. Listening to the music of the old Dee Jays My life was marching past with the brass parade. Very often your dreams are bypassing the mechanics of speech so you imagine having had a conversation and various feelings, but not the speaking itself.

At the face value of the question, response is "Yes". This can be enabled by the app called SpeepBot (free, iOS): it records all movements and sounds, so upon waking up you will be able to hear exactly what you've spoken in your sleep. Otherwise, I need to request a correction: talking in one's sleep is no more common in mid-age than it is in any other age. Why, you ask? That's because humans as young as infants are talking in their sleep - and based on my experience with my own child, often kids mentally re-process their daily experiences, and many times I had funny moments when my own child was trying to explain things to me half-asleep/half-awake which amounted to something inaudible. In the morning, however, the child was pleading the Fifth (amendment) when I tried to re-create the situation. In the end, if the question was about the purposeful recollection of events (without any external aids such as either the app or the parent), I believe it's all but impossible.