Post-concussion syndrome
About 10% of people with PCS develop sensitivity to light or noise, about 5% experience a decreased sense of taste or smell, and about 14% report blurred vision. People may also have double vision or ringing in the ears, also called tinnitus. PCS may cause insomnia, fatigue, or other problems with sleep.
Precordial catch syndrome
The Huchard syndrome was then studied more deeply by Miller and Texidor, medical practitioners at the Cardiovascular Department and the Department of Medicine at the Michael Reese Hospital in Chicago, in 1955. They reported the condition in 10 patients, one being Miller himself. In 1978, PCS was discussed by Sparrow and Bird who reported that 45 healthy patients suffered from it and that it was probably more frequent than generally assumed. PCS in American children has been discussed by Pickering in 1981 and by Reynolds in 1989. These constitute the literature available in English on PCS.