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The vagus nerve. Polyvagal theory (PVT) is a collection of proposed evolutionary, neuroscientific, and psychological constructs pertaining to the role of the vagus nerve in emotion regulation, social connection and fear response. The theory was introduced in 1994 by Stephen Porges. [1]
Stephen W. Porges (born 1945) is an American psychologist.He is the Professor of Psychiatry at the University of North Carolina at Chapel Hill. [1] Porges is also currently Director of the Kinsey Institute Traumatic Stress Research Consortium at Indiana University Bloomington, [2] which studies trauma.
The polyvagal theory by Porges is an influential model of how the vagal pathways respond to novelty and to stressful external stimuli. [30] [31] [32] The theory proposes that there are two vagal systems, one that is shared with reptiles and amphibia and a second, more recent, system that is unique to mammals. The two pathways behave differently ...
Prior to the development of DRT, existing theories of PTSD fell into two camps: social-cognitive theories and information-processing theories. [1] Social-cognitive theories (e.g. Horowitz's stress-response theory, [4] Janoff-Bulman's shattered assumptions theory) focused on the affected individual's assumptions about the world and the emotional and cognitive impact of the trauma on these ...
Richter interpreted this that the rats died as a result of over-stimulation of the parasympathetic nervous system, specifically the vagus nerve which regulates heartbeat. The lethal vagal effect was the psychological state of hopelessness. [5] Sudden prolonged immobility or faked death is an adaptive response exhibited by many mammalian species.
In contrast to Post-Traumatic Stress Disorder, which springs from fear, moral injury is a violation of what each of us considers right or wrong. The diagnosis of PTSD has been defined and officially endorsed since 1980 by the mental health community, and those suffering from it have earned broad public sympathy and understanding.
The key to absorbing stress and moral challenges is to “own what you can control, and think before you take on negative thoughts and start blaming yourself,” said Sgt. 1st Class Eric Tobin, a master resilience trainer. If women and children are inadvertently killed in battle, he said, “feeling bad about that is normal.
Autonomic nervous system, showing splanchnic nerves in middle, and the vagus nerve as "X" in blue. The heart and organs below in list to right are regarded as viscera. The autonomic nervous system has been classically divided into the sympathetic nervous system and parasympathetic nervous system only (i.e., exclusively motor).