Changes

}}</ref> showing that the nervous system had been permanently sensitized to heightened pain sensation.

<blockquote>

Although postsurgical central sensitisation (allodynia and hyperalgesia) can extend to sites of the body distal from the wound, suggesting a supraspinal effect, the long-term consequences of surgery done without anaesthesia are likely to include post-traumatic stress as well as pain. It is, therefore, possible that the greater vaccination response in the infants circumcised without anaesthesia may represent an <u>infant analogue of a post-traumatic stress disorder</u> triggered by a traumatic and painful event and re-experienced under similar circumstances of pain during vaccination.<ref name="taddio1997" />