The concept of "respiratory personality" in twins

Abstract

Introduction. The first who introduced the term "respiratory personality" was Dejours (1961). He discovered differences in the respiratory pattern from one person to another and suggested that the respiratory pattern may be a stable feature of personality. Aim of the study. To study the concept of "respiratory personality" in twins Materials and methods. The group was made of 16 twins (8 pairs) in the age of 24+-6(the youngest are 18 years old, the eldest 30). All don't have respiratory pathology, are healthy and didn't take psychoactive substances before the experiment. The current study was applied in 2 steps. First determines psychometric properties of twins, which were described using PID-5 test. This test has 220 autoreport elements, evaluated from 0 to 3. This test discovers maladaptive personality traits from DSM-5. Second step was made to record respiratory pattern using respiratory inductive pletismography Visuresp RBI France and Capnography Capnostream. The experimental protocol included recording the respiratory variables in 27 minutes: 5 minutes in rest, 3 minutes of pain, 3 minutes postpain rest, 1 minute stress,3 minutes poststress rest, duration of apnea, 3 min postapnea rest, 3 minutes of metronome guided volunteer hyperventilation, 5 minutes of rest. Results. (1) For all the girls in a pair of twins, the PID-5 domains are more pronounced in one girl than in the second in pair. (2) In a pair of twins, the same domains of PID-5 are often found. The most common is the domain of Disinhibition (6 pairs) and Detachment (7 pairs). (3) Two pairs are similar in all domains. And they are girls. (4) EtCO2 is initially the same in a pair of twins. At 37.5% it starts to differ in the sample with apnea (5) 75% had the same length of apnea (6) 75% had a similar level of pain (7) 62.5% of couples showed the same trend in the change in respiratory rate during the following samples: in transfer from post-pain to stress samples and in transfer from stress to post-stress samples. (8) the same length of apnea are represented in twins with the same Disinhibition domain. Conclusions: 1. Even with different PID-5 domains, some variables of the respiratory pattern in twins are the same 2. Twins are very similar in PID-5 items, of which the most common domain is Detachment 3. The most common in PID-5 domains are girls 4. Domain of Disinhibition may have an effect on the length of apnea.