Physiology is the branch of biology that deals with the functions of living organisms and the parts of which they are made. This scientific discipline covers a wide variety of functions, ranging from the cellular and below to the interaction of organ systems that keep the most complex biological machines running.
PTSD redirects here. For the album by Pharoahe Monch, see PTSD (album). Posttraumatic stress disorder (PTSD) is a mental disorder that can develop after a person is exposed to a traumatic event, such as sexual assault, warfare, traffic collisions, or other threats on a person's life.
Posttraumatic stress disorder (PTSD) is a serious mental condition that some people develop after a shocking, terrifying, or dangerous event. These events are called traumas. After a trauma, itâs common to struggle with fear, anxiety, and sadness. You may have upsetting memories or find it hard to sleep. Most people get better with time. But if you have PTSD, these thoughts and feelings donât fade away. They last for months and years, and may even get worse. PTSD causes problems in your daily life, such as in relationships and at work. It can also take a toll on your physical health. But with treatment, you can live a fulfilling life. How Does PTSD Happen?