Question:
If one awakens unexpectedly in the middle of the night and wants to learn but still hopes to fall back asleep what should be done?
Thank you
Answer:
Since his original intention was to sleep uninterupted the entire night, when he falls asleep the birkas hatorah he made the previous morning terminates and therefore when he wakes up unexpectedly in the middle of the night has to make a new birkas hatorah.
Sources:
O:CH 47:12-13, Mishnah Berurah 47:29