PAIN

One pdf summarized pain in different aspects: 

* Pain physiology 

* Type of pain

* Table to compare between: somatic pain, bone pain, visceral pain, and neuropathic pain

* Common response to pain

* Origin of pain

* Source of pain

* Pain duration

* Receptors

* Pain pathway 

‎‏Target audience:

- 3-4-5 year medical students 

- Interns 

- Neurology residents