In his first television appearance, Officer Frank Chiafari speaks out about the horror he witnessed during the February 2009 chimpanzee attack that left its victim mangled and disfigured. When he came face to face with the enraged primate, he had no choice but to shoot. The events of that day haunted him; Chiafari struggled with post-traumatic stress disorder, an anxiety disorder marked by intrusive thoughts and periods of sadness, anger or depression that people can develop after experiencing a life-threatening experience. Chiafari shares his story and extends a message of hope to those suffering with PTSD. Dr. Oz delves into the mind-body responses that are characteristic of PTSD.

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What to Do When Your Partner Sleep Talks & You Really Need Some Rest

Sleep talking is both common and almost always harmless... to the person doing the talking.

Q: My partner has started talking in his sleep — a lot. Is it a sign of anxiety or something physically wrong? It's ruining my sleep and it can't be good for his sleep. How can I help him stop?

A: Sleep talking is both common and almost always harmless... to the person doing the talking. It may be expressed in incoherent mumbles or be clear as a bell, and it can be related to dreams or simply come from thoughts floating through a sleeping brain. The talkers usually have no idea it's going on and their sleep is not disturbed by it. A study in the journal Sleep Medicine found that around 66% of people have experienced sleep talking —but it isn't something that is frequent or persistent.

Is Sleep Talking Bad for My Health?

Sleep talking is not considered a health risk, but there are sleep disturbances that are linked to long-term health problems, such as mood disorders, cognition problems, heart disease, diabetes and even colorectal cancer. Sleep talking is also distinct from other conditions that trigger vocalization during sleep, such as catathrenia, a breathing disorder that causes audible groaning, and REM sleep behavior disorder (RBD), in which a person physically acts out a dream. Those conditions should be treated by a sleep specialist.

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