Abscesses occur when an area of tissue becomes infected and the body's immune system tries to fight it. White blood cells move through the walls of the blood vessels into the area of the infection and collect within the damaged tissue. During this process, pus forms.
cognition cogÂ·niÂ·tion (kÅg-nÄ­sh'Én) n. The mental faculty of knowing, which includes perceiving, recognizing, conceiving, judging, reasoning, and imagining.
Cognition. 1  Diminished ability to make decisions and think clearly. 2  Lack of concentration and poor memory. 3  Fear that you can not care for the baby or fear of the baby. 4  Worry about harming self, baby, or partner.