Common signs and symptoms of central sleep apnea include: 
Observed episodes of not breathing or abnormal breathing patterns during sleep
Abrupt awakenings accompanied by shortness of breath
Difficulty staying asleep (insomnia)
Excessive daytime sleepiness (hypersomnia)
Difficulty concentrating
Mood changes
Morning headaches
Snoring
 Although snoring indicates some degree of airflow obstruction, snoring can also be heard in the presence of central sleep apnea. However, snoring may not be as prominent with central sleep apnea as it is with obstructive sleep apnea.