Dilator naris function: a useful test of facial nerve integrity.
The dilator naris muscle is an active participant of respiration in man. Its level of function appears to vary directly with ventilatory resistance. Three cases are reported to illustrate the use of the respiratory function of this muscle as a clinical test of seventh nerve integrity when its volitional function cannot be elicited.
D000293:Adolescent; D000328:Adult; D004576:Electromyography; D005152:Facial Muscles / Q000294:innervation / Q000502:physiology*; D005154:Facial Nerve / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009666:Nose; D012119:Respiration