Pain is generally an unpleasant feeling in response to an event that either damages or can potentially damage the body's tissues. There are four main steps in the process of feeling pain: transduction , transmission, perception , and modulation .  The nerve cells that detect pain have cell bodies located in the dorsal root ganglia and fibers that transmit these signals to the spinal cord.  The process of pain sensation starts when the pain-causing event triggers the endings of appropriate sensory nerve cells . This type of cell converts the event into an electrical signal by transduction. Several different types of nerve fibers carry out the transmission of the electrical signal from the transducing cell to the posterior horn of spinal cord , from there to the brain stem , and then from the brain stem to the various parts of the brain such as the thalamus and the limbic system . In the brain, the pain signals are processed and given context in the process of pain perception . Through modulation, the brain can modify the sending of further nerve impulses by decreasing or increasing the release of neurotransmitters . 
The Romans are credited with the invention of the first smoke-free heating system in Western Europe: the hypocaust. Until recently, historians had assumed that its technology was largely lost after the collapse of the Roman Empire. In fact, however, it lived on in large parts of Europe, and was further developed into the “heat storage hypocaust”, an underground furnace on top of which granite stones would be piled, to then release hot air through vents in the floor. By this means, a room could be kept warm for days with just one firing of the hypocaust's furnace. Continue reading "Heat Storage Hypocausts: Air Heating in the Middle Ages" »
I am suffering from low T levels, low LH and FSH levels.
T - 210 (normal lowest level 240 ng/dl)
T levels are below normal, LH and FSH levels are low normal. I have all symptoms of low testosterone ie. ED problems. fatigue all the time, lack of energy and concentration etc. My married ife is getting ruined because of this. I am just 25 years of age.
My DOc says my LH and FSH levels are under normal and it's more mental probelm than physical. I was like wtf :confused:
I met an endocrinologist and he gave me these T injections for every 10 days. I felt little better but after stopping thedosage things have gone back to where they started really confused what shall I be doing? I know for sure it's nothing mental.