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Polyvagal theory views the parasympathetic nervous system as being split into two distinct branches: a "ventral vagal system" which supports social engagement, and a "dorsal vagal system" which supports immobilisation behaviours, both "rest and digest" and defensive immobilisation or "shutdown". [14]
The dorsal nucleus of vagus nerve (or posterior nucleus of vagus nerve or dorsal vagal nucleus or nucleus dorsalis nervi vagi or nucleus posterior nervi vagi) [1] is a cranial nerve nucleus of the vagus nerve (CN X) situated in the medulla oblongata of the brainstem ventral to the floor of the fourth ventricle.
The Trendelenburg position may be used for drainage images during endoscopic retrograde cholangiopancreatography. [10] The Trendelenburg position is reasonable in those with a cord prolapse who are unable to achieve a knee-to-chest position. [11] It is a temporary measure until a cesarean section can be performed. [11]
The area postrema makes up part of the dorsal vagal complex, which is the critical termination site of vagal afferent nerve fibers, along with the dorsal motor nucleus of the vagus and the NTS. Nausea is most likely induced via stimulation of the area postrema via its connection to the NTS, which may serve as the beginning of the pathway ...
It is increased in supine position and decreased in prone position, and is on average higher and more pronounced during the day as compared to the night. [22] RSA has also been extensively used to quantify vagal tone withdrawal in graded orthostatic tilt. [7] [25] Typically, expression of RSA decreases with age. [26]
The women who were able to orgasm more frequently tended to be older, had sex more often, and more often participated in the following positions: face to face with the woman on top, sitting face ...
The dorsal respiratory group (DRG) has the most fundamental role in the control of respiration, initiating inspiration (inhalation). The DRG is a collection of neurons forming an elongated mass that extends most of the length of the dorsal medulla. They are near to the central canal of the spinal cord, and just behind the ventral group.
A Canadian survey found that 39% of respondents preferring the "log" position (lying on one's side with the arms down the side) and 28% preferring to sleep on their side with their legs bent. [1] A Travelodge survey found that 50% of heterosexual British couples prefer sleeping back-to-back, either not touching (27%) or touching (23%).