mise à jour du
11 novembre 2002
Aminoff Michael J
Neurology and general medecine
Churchill Livingston New York


Yawning is coordinated from brainstem sites near the paraventricular nucleus via extrapyramidal pathways.
This reflex may occur in patients "locked in" from pontine transection who have nonvolitional mouth opening
with spontaneous yawns.
Yawning in the setting of a pyramidal lesion (capsular infarction) may be associated with arm stretchling in the paretic limb, supporting the involvement of extra pyramidal circuitry.
Cortical input also occurs, as reflected by the yawning related to boredom and somnolence. Yawning has been seen to initiate a temporal lobe seizure.