Awakenings from sleep refer to the process of transitioning from a state of unconsciousness to a state of consciousness. This process is known as arousal and is typically associated with the transition from sleep to wakefulness. Arousal can also refer to the physiological and psychological changes that occur in the body during this transition. These changes can include increased heart rate, increased respiration, and increased alertness. Awakenings from sleep are an important part of the sleep cycle and can be affected by various factors such as stress, environment, and medications.