Reduced muscle tone in the upper airway during sleep leads to increased resistance to the flow of air, and partial obstruction often results in loud snoring. This symptom may be associated with the obstructive sleep apnea-hypopnea syndrome (OSAHS), which may be associated with a variety of neurological symptoms including excessive daytime somnolence, episodic loss of consciousness, headache (especially morning), cognitive decline, and increased risk of stroke (snoring may be an independent risk factor for stroke).
Huang L, Quinn SJ, Ellis PDM, Ffowcs Williams JE. Biomechanics of snoring. Endeavour 1995; 19: 96-100
Larner AJ. Obstructive sleep apnea syndrome presenting in a neurology outpatient clinic. International Journal of Clinical Practice 2003; 57: 150-152
Spriggs DA, French JM, Murdy JM, Curless RH, Bates D, James OFW. Snoring increases the risk of stroke and adversely affects prognosis. Quarterly Journal of Medicine 1992; 84: 555-562