Pathologic yawning: neurologic aspects
Excessive yawning is increasingly being recognized as a manifestation of neurologic disorders. According to the thermoregulatory theory of yawning, its function is to cool the brain, and excessive yawning may be a symptom of conditions that increase brain temperature. However, several drugs are reported to induce yawning, and this should be taken into consideration in the differential diagnosis.
Sep. 29, 2020