Hypogalesia, Hypoestheis, Allodynia 의 정의

Allodynia
Pain due to a stimulus that does not normally provoke pain.

Pain in response to nonnociceptive stimulus

Brushing to skin is the only established example

Hyperalgesia
Increased pain from a stimulus that normally provokes pain.

Whether test stimulus may or may not activate nociceptors is unclear, hyperalgesia is preferred term.

Hypoalgesia
Diminished pain in response to a normally painful stimulus.

Hyperesthesia
Increased sensitivity to stimulation, excluding the special senses.

Hypoesthesia
Decreased sensitivity to stimulation, excluding the special senses.

The implications of some of the above definitions may be summarized for convenience as follows:
Allodynia	lowered threshold	stimulus and response mode differ
Hyperalgesia	increased response	stimulus and response mode are the same
Hyperpathia	raised threshold: increased response	stimulus and response mode may be the same or different
Hypoalgesia	raised threshold: lowered response	stimulus and response mode are the same

이렇게 IASP에서 정의하고 있는데...

Hypoalgesia, Hyperalgesia to pinprick

Hypoesthesia, Hyperalgesia to tactile stimuli

Allodynia to brush and cold, and temporal summation

이렇게 기억하는 것이 좋겠다.