Perceived Body Position under Lateral Body Tilt

1969 ◽  
Author(s):  
A. Harvey Baker ◽  
Leonard Cirillo ◽  
Seymour Wapner
Keyword(s):  
Body Position ◽  
Body Tilt ◽  
Lateral Body

Method of Stimulus Presentation and Apparent Body Position under Lateral Body Tilt

1967 ◽  
Vol 24 (1) ◽  
pp. 43-50 ◽  
Author(s):  
M. Bauermeister ◽  
S. Wapner ◽  
H. Werner
Keyword(s):  
Reference System ◽  
Body Position ◽  
Body Schema ◽  
Stimulus Presentation ◽  
Body Axis ◽  
Body Tilt ◽  
Spatial Reference ◽  
Longitudinal Body Axis ◽  
Lateral Body ◽  
Method Of Constant Stimuli

Eighty Ss, 40 male and 40 female, indicated by means of a luminescent rod the location of their longitudinal body axis (apparent body position) under body tilt ranging from 90° left (counterclockwise), through upright, to 90° right (clockwise). The luminescent rod was presented by two psychophysical methods: (a) the method of limits and (b) the method of constant stimuli. Deviations of apparent from objective body position showed significant differences between the two methods. The results were interpreted in terms of an organismic theory of perception, utilizing the notion of a dynamic body schema as spatial reference system which was subject to modifications due to the method of stimulus presentation.

Abstract 114: Effect of Body Position on Intracranial Pressure and Carotid Blood Flow During Extracorporeal Cardiopulmonary Resuscitation

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_4) ◽  
Author(s):  
Yaël Levy ◽  
Rocio Fernandez ◽  
Fanny Lidouren ◽  
Matthias Kohlhauer ◽  
Lionel Lamhaut ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cardiac Arrest ◽  
Intracranial Pressure ◽  
Cardiopulmonary Resuscitation ◽  
Body Position ◽  
Spontaneous Circulation ◽  
Systemic Hemodynamics ◽  
Body Tilt ◽  
Whole Body ◽  
Extracorporeal Cardiopulmonary Resuscitation

Introduction: Extracorporeal cardiopulmonary resuscitation (E-CPR) using extracorporeal membrane oxygenation (ECMO) is widely proposed for the treatment of refractory cardiac arrest. Hypothesis: Since cerebral autoregulation is altered in such conditions, body position may modify hemodynamics during ECPR. Our goal was to determine whether a whole body tilt-up challenge (TUC) could lower intracranial pressure (ICP) as previously shown with conventional CPR, without deteriorating cerebral blood flow (CBF). Methods: Pigs were anesthetized and instrumented for the continuous evaluation of CBF, ICP and systemic hemodynamics. After 15 min of untreated ventricular fibrillation they were treated with 30 min of E-CPR followed by sequential defibrillation shocks until resumption of spontaneous circulation (ROSC). ECMO was continued after ROSC to target a mean arterial pressure (MAP) >60 mmHg. Animals were maintained in the flat position (FP) throughout protocol, except during a 2 min TUC of the whole body (+30°) at baseline, during E-CPR and after-ROSC. Results: Four animals received the entire procedure and ROSC was obtained in 3/4. After cardiac arrest, E-CPR was delivered at 29±2 ml/kg/min to maintain a MAP of 57±8 mmHg in the FP. CBF was 28% of baseline and ICP remain stable (12±1 vs 13±1 mmHg during ECPR vs baseline, respectively). Under baseline pre-arrest conditions TUC resulted in a significant decrease in ICP (-63±7%) and CBF (-21±3%) versus the FP, with no significant effect on systemic hemodynamics. During E-CPR and after ROSC, TUC markedly reduced ICP but CBF remained unchanged vs the FP (Figure). Conclusion: During E-CPR whole body TUC reduced ICP without lowering CBF compared with E-CPR flat. Additional investigations with prolonged TUC and selective head and thorax elevation during E-CPR are warranted.

Perception of the Visual Horizontal during Lateral Body Tilt: Right-Left Asymmetries

1978 ◽  
Vol 47 (3) ◽  
pp. 715-720 ◽  
Author(s):  
Martin Bauermeister
Keyword(s):  
Body Tilt ◽  
Linear Effect ◽  
Non Linear Effect ◽  
Lateral Body ◽  
Non Linear ◽  
The Right

Subjects, 55 males and 45 females, indicated by means of a luminescent rod the visual horizontal under conditions of lateral body tilt ranging from 10° to 90° to the right and to the left. There was a non-linear effect of the angle of tilt on the degree of deviation of apparent from objective horizontal. With small angles of tilt the apparent horizontal tended to deviate opposite to the direction of body tilt, with larger angles, in the direction of tilt. Uncertainty of judgment increased with increasing angles of tilt.

scholarly journals A keresztcsonti ízület mobilitásának vizsgálata derékpanaszos betegcsoportban

2017 ◽  
Vol 158 (52) ◽  
pp. 2079-2085
Author(s):  
Máté Burkus ◽  
István Márkus ◽  
Bálint Niklai ◽  
Miklós Tunyogi-Csapó
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Sacroiliac Joint ◽  
Pelvic Incidence ◽  
Body Position ◽  
Joint Laxity ◽  
Body Tilt ◽  
Upper Body ◽  
Low Back ◽  
Pelvic Parameters

Abstract: Introduction: Sagittal alignment of the pelvis is typically characterized using three fundamental parameters. Among these, pelvic incidence is traditionally considered to be anatomically ‘constant’. Aim: We aimed to analyze the pelvic parameters of low back pain patients with suspected sacroiliac joint laxity. Method: Pelvic parameters were assessed in standing and seated EOS 2D/3D radiographs of 48 cases of persistent low back pain, and compared to upper body position using cluster analysis and t-test. Results: Median pelvic incidence did not differ statistically between standing and sitting (47.8°–47.7°). However, in individual analysis 7 cases (15%) exhibited a forward tilt in their upper body with an increased pelvic incidence, and 7 cases (15%) showed a backward upper body tilt. No change was found in 34 cases. Conclusion: Our results indicate the pelvis should not be regarded as a rigid unit, as in some cases significant appreciable sacroiliac joint laxity can occur. Orv Hetil. 2017; 158(52): 2079–2085.

scholarly journals Self-Reported Onset of Paroxysmal Atrial Fibrillation Is Related to Sleeping Body Position

2021 ◽  
Vol 12 ◽  
Author(s):  
Lisa A. Gottlieb ◽  
Lorena Sanchez y Blanco ◽  
Mélèze Hocini ◽  
Lukas R. C. Dekker ◽  
Ruben Coronel
Keyword(s):  
Atrial Fibrillation ◽  
Body Position ◽  
Lateral Position ◽  
University Hospital ◽  
Ablation Therapy ◽  
Left Lateral Position ◽  
Treatment And Prevention ◽  
Lateral Body ◽  
History Of ◽  
Underlying Mechanisms

Background: Because stretch of the atrial myocardium is proarrhythmic for atrial fibrillation (AF) and a left lateral body position increases atrial dimensions in humans, we hypothesized that left lateral recumbence is a frequent AF-triggering body position in AF patients.Methods: We performed a questionnaire study of symptomatic paroxysmal AF (episodes of AF < 1 week) patients scheduled for a first AF ablation therapy at Catharina Hospital, Eindhoven, the Netherlands and at University Hospital, Bordeaux, France.Results: Ninety-four symptomatic paroxysmal AF patients were included [mean age 61 ± 11 years, median AF history of 29(48) months, 31% were females]. Twenty-two percent of patients reported a specific body position as a trigger of their AF symptoms. The triggering body position was left lateral position in 57% of cases, supine position in 33%, right lateral position in 10%, and prone position in 5% (p = 0.003 overall difference in prevalence). Patients with positional AF had a higher body mass index compared to patients without nocturnal/positional AF [28.7(4.2) and 25.4(5.2) kg/m2, respectively, p = 0.025], but otherwise resembled these patients.Conclusion: Body position, and the left lateral position, in particular, is a common trigger of AF in symptomatic AF patients. Moreover, positional AF is associated with overweight. Understanding of the underlying mechanisms of positional AF can contribute to AF treatment and prevention.

scholarly journals Does Obstructive Sleep Apnea Worsen During REM Sleep?

2013 ◽  
pp. 569-575 ◽  
Author(s):  
I. PEREGRIM ◽  
S. GREŠOVÁ ◽  
M. PALLAYOVÁ ◽  
B. L. FULTON ◽  
J. ŠTIMMELOVÁ ◽  
...  
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Rem Sleep ◽  
Body Position ◽  
Statistical Significance ◽  
Nrem Sleep ◽  
Sleep Stages ◽  
Lateral Body ◽  
Obstructive Sleep ◽  
Significant Difference

Although it is thought that obstructive sleep apnea (OSA) is worse during rapid eye movement (REM) sleep than in non-REM (NREM) sleep there are some uncertainties, especially about apnoe-hypopnoe-index (AHI). Several studies found no significant difference in AHI between both sleep stages. However, REM sleep is associated more with side sleeping compared to NREM sleep, which suggests that body position is a possible confounding factor. The main purpose of this study was to compare the AHI in REM and NREM sleep in both supine and lateral body position. A retrospective study was performed on 422 consecutive patients who underwent an overnight polysomnography. Women had higher AHI in REM sleep than NREM sleep in both supine (46.05±26.26 vs. 23.91±30.96, P<0.01) and lateral (18.16±27.68 vs. 11.30±21.09, P<0.01) body position. Men had higher AHI in REM sleep than NREM sleep in lateral body position (28.94±28.44 vs. 23.58±27.31, P<0.01), however, they did not reach statistical significance in supine position (49.12±32.03 in REM sleep vs. 45.78±34.02 in NREM sleep, P=0.50). In conclusion, our data suggest that REM sleep is a contributing factor for OSA in women as well as in men, at least in lateral position.

Comparison of Deaf and Hearing Children on Body-Object Localization

1976 ◽  
Vol 42 (3) ◽  
pp. 747-750 ◽  
Author(s):  
Peter E. Comalli ◽  
Stephanie Schmidt ◽  
Morton W. Altshuler
Keyword(s):  
Body Position ◽  
Longitudinal Axis ◽  
Normal Hearing ◽  
The Body ◽  
Object Localization ◽  
Body Tilt ◽  
Deaf Children ◽  
Visual Vertical ◽  
Left And Right ◽  
Hearing Children

20 profoundly deaf and 20 normal hearing children from ages 10 to 13 were compared as to their ability to locate visually the position of apparent vertical and the apparent location of the longitudinal axis of the body under erect and 30° left and right body-tilt. Both deaf and normal hearing children were able accurately to locate a rod to the apparent visual vertical, but deaf children were significantly more accurate in aligning a rod to their apparent body-position than hearing children. This finding is discussed from both a learning view and from a hypothesis of developmental lag.

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