"The fact is that the brain rules in terms of pain perception."

Nonetheless, he said, the new article makes a compelling case for lack of pain perception in fetuses before 29 weeks.

Once the message gets to the brain, it may or may not lead to pain perception.

Substance P is an important element in pain perception.

Further studies linked sleep disorder to the patients' unusual pain perception.

Activity in many parts of the brain is associated with pain perception.

What do we know about pain perception and pain relief for babies?

We now know a great deal about pain perception in utero.

This is especially true for the considerable evidence that has accumulated on the differences in pain perception by the sexes.

Medium doses of marijuana can reduce pain perception, another study found.