The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
Yoshimitsu Shimoyama - One of the best experts on this subject based on the ideXlab platform.
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Water Immersion decreases sympathetic skin response during color word stroop test
PLOS ONE, 2017Co-Authors: Daisuke Sato, Akari Takahashi, Saki Nakano, Kaho Iguchi, Rio Nara, Yoshihito Uetake, Yudai Yamazaki, Yasuhiro Baba, Yoshimitsu ShimoyamaAbstract:Water Immersion alters the autonomic nervous system (ANS) response in humans. The effect of Water Immersion on executive function and ANS responses related to executive function tasks was unknown. Therefore, this study aimed to determine whether Water Immersion alters ANS response during executive tasks. Fourteen healthy participants performed color–word-matching Stroop tasks before and after non-Immersion and Water Immersion intervention for 15 min in separate sessions. The Stroop task-related skin conductance response (SCR) was measured during every task. In addition, the skin conductance level (SCL) and electrocardiograph signals were measured over the course of the experimental procedure. The main findings of the present study were as follows: 1) Water Immersion decreased the executive task-related sympathetic nervous response, but did not affect executive function as evaluated by Stroop tasks, and 2) decreased SCL induced by Water Immersion was maintained for at least 15 min after Water Immersion. In conclusion, the present results suggest that Water Immersion decreases the sympathetic skin response during the color–word Stroop test without altering executive performance.
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The effect of Water Immersion on short-latency somatosensory evoked potentials in human
BMC Neuroscience, 2012Co-Authors: Daisuke Sato, Yoshimitsu Shimoyama, Koya Yamashiro, Hideaki Onishi, Takuya Yoshida, Atsuo MaruyamaAbstract:Background Water Immersion therapy is used to treat a variety of cardiovascular, respiratory, and orthopedic conditions. It can also benefit some neurological patients, although little is known about the effects of Water Immersion on neural activity, including somatosensory processing. To this end, we examined the effect of Water Immersion on short-latency somatosensory evoked potentials (SEPs) elicited by median nerve stimuli. Short-latency SEP recordings were obtained for ten healthy male volunteers at rest in or out of Water at 30°C. Recordings were obtained from nine scalp electrodes according to the 10-20 system. The right median nerve at the wrist was electrically stimulated with the stimulus duration of 0.2 ms at 3 Hz. The intensity of the stimulus was fixed at approximately three times the sensory threshold. Results Water Immersion significantly reduced the amplitudes of the short-latency SEP components P25 and P45 measured from electrodes over the parietal region and the P45 measured by central region. Conclusions Water Immersion reduced short-latency SEP components known to originate in several cortical areas. Attenuation of short-latency SEPs suggests that Water Immersion influences the cortical processing of somatosensory inputs. Modulation of cortical processing may contribute to the beneficial effects of aquatic therapy. Trial Registration UMIN-CTR (UMIN000006492)
Adeline Chow - One of the best experts on this subject based on the ideXlab platform.
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Water‐Immersion wrinkling is due to vasoconstriction
Muscle & nerve, 2003Co-Authors: Einar Wilder-smith, Adeline ChowAbstract:The underlying mechanism of the Water-Immersion skin wrinkling test, which is used as a test of sympathetic nerve function, remains elusive. We investigated changes of blood circulation in the hand occurring with Water-Immersion wrinkling by measuring the velocity of ulnar and digital artery blood flow, and of digit skin blood flow, in healthy subjects before and during wrinkling. Wrinkling was accompanied by significant reduction in blood flow velocity in all vessels, with a maximum in digital vessels. Our data show that Water-Immersion wrinkling is a function of digit pulp vasoconstriction. This test of sympathetic function can now be quantified using parameters of blood flow velocity, enabling its more widespread and accurate use.
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Water Immersion and EMLA cause similar digit skin wrinkling and vasoconstriction.
Microvascular research, 2003Co-Authors: Einar Wilder-smith, Adeline ChowAbstract:Water Immersion skin wrinkling tests limb sympathetic vasoconstrictor function. We have recently shown that Water Immersion wrinkling is accompanied by digit vasoconstriction and postulated that vasoconstriction is the main underlying mechanism. To test this further, we applied vasoconstrictive cream (EMLA) to the distal digit and compared the degree of skin wrinkling and digit blood flow reduction with those after Water Immersion. In 25 healthy volunteers (6 male, 19 female; mean age, 35 yr) subjected to EMLA and Water Immersion, both clinical wrinkling scores and reduction in digit blood flow (mean of 2.01 and 2.29 cm/s, respectively) were nearly identical. Control using aqueous cream resulted in minimal skin wrinkling and nonsignificant reduction in digit artery flow (P = 0.170). These data further support that Water Immersion skin wrinkling is mediated by vasoconstriction. The EMLA cream patch test may develop into a useful screening test for hand sympathetic vasoconstrictor function.
Daisuke Sato - One of the best experts on this subject based on the ideXlab platform.
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Water Immersion decreases sympathetic skin response during color word stroop test
PLOS ONE, 2017Co-Authors: Daisuke Sato, Akari Takahashi, Saki Nakano, Kaho Iguchi, Rio Nara, Yoshihito Uetake, Yudai Yamazaki, Yasuhiro Baba, Yoshimitsu ShimoyamaAbstract:Water Immersion alters the autonomic nervous system (ANS) response in humans. The effect of Water Immersion on executive function and ANS responses related to executive function tasks was unknown. Therefore, this study aimed to determine whether Water Immersion alters ANS response during executive tasks. Fourteen healthy participants performed color–word-matching Stroop tasks before and after non-Immersion and Water Immersion intervention for 15 min in separate sessions. The Stroop task-related skin conductance response (SCR) was measured during every task. In addition, the skin conductance level (SCL) and electrocardiograph signals were measured over the course of the experimental procedure. The main findings of the present study were as follows: 1) Water Immersion decreased the executive task-related sympathetic nervous response, but did not affect executive function as evaluated by Stroop tasks, and 2) decreased SCL induced by Water Immersion was maintained for at least 15 min after Water Immersion. In conclusion, the present results suggest that Water Immersion decreases the sympathetic skin response during the color–word Stroop test without altering executive performance.
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The effect of Water Immersion on short-latency somatosensory evoked potentials in human
BMC Neuroscience, 2012Co-Authors: Daisuke Sato, Yoshimitsu Shimoyama, Koya Yamashiro, Hideaki Onishi, Takuya Yoshida, Atsuo MaruyamaAbstract:Background Water Immersion therapy is used to treat a variety of cardiovascular, respiratory, and orthopedic conditions. It can also benefit some neurological patients, although little is known about the effects of Water Immersion on neural activity, including somatosensory processing. To this end, we examined the effect of Water Immersion on short-latency somatosensory evoked potentials (SEPs) elicited by median nerve stimuli. Short-latency SEP recordings were obtained for ten healthy male volunteers at rest in or out of Water at 30°C. Recordings were obtained from nine scalp electrodes according to the 10-20 system. The right median nerve at the wrist was electrically stimulated with the stimulus duration of 0.2 ms at 3 Hz. The intensity of the stimulus was fixed at approximately three times the sensory threshold. Results Water Immersion significantly reduced the amplitudes of the short-latency SEP components P25 and P45 measured from electrodes over the parietal region and the P45 measured by central region. Conclusions Water Immersion reduced short-latency SEP components known to originate in several cortical areas. Attenuation of short-latency SEPs suggests that Water Immersion influences the cortical processing of somatosensory inputs. Modulation of cortical processing may contribute to the beneficial effects of aquatic therapy. Trial Registration UMIN-CTR (UMIN000006492)
Einar Wilder-smith - One of the best experts on this subject based on the ideXlab platform.
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Water‐Immersion wrinkling is due to vasoconstriction
Muscle & nerve, 2003Co-Authors: Einar Wilder-smith, Adeline ChowAbstract:The underlying mechanism of the Water-Immersion skin wrinkling test, which is used as a test of sympathetic nerve function, remains elusive. We investigated changes of blood circulation in the hand occurring with Water-Immersion wrinkling by measuring the velocity of ulnar and digital artery blood flow, and of digit skin blood flow, in healthy subjects before and during wrinkling. Wrinkling was accompanied by significant reduction in blood flow velocity in all vessels, with a maximum in digital vessels. Our data show that Water-Immersion wrinkling is a function of digit pulp vasoconstriction. This test of sympathetic function can now be quantified using parameters of blood flow velocity, enabling its more widespread and accurate use.
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Water Immersion and EMLA cause similar digit skin wrinkling and vasoconstriction.
Microvascular research, 2003Co-Authors: Einar Wilder-smith, Adeline ChowAbstract:Water Immersion skin wrinkling tests limb sympathetic vasoconstrictor function. We have recently shown that Water Immersion wrinkling is accompanied by digit vasoconstriction and postulated that vasoconstriction is the main underlying mechanism. To test this further, we applied vasoconstrictive cream (EMLA) to the distal digit and compared the degree of skin wrinkling and digit blood flow reduction with those after Water Immersion. In 25 healthy volunteers (6 male, 19 female; mean age, 35 yr) subjected to EMLA and Water Immersion, both clinical wrinkling scores and reduction in digit blood flow (mean of 2.01 and 2.29 cm/s, respectively) were nearly identical. Control using aqueous cream resulted in minimal skin wrinkling and nonsignificant reduction in digit artery flow (P = 0.170). These data further support that Water Immersion skin wrinkling is mediated by vasoconstriction. The EMLA cream patch test may develop into a useful screening test for hand sympathetic vasoconstrictor function.
Douglas K. Rex - One of the best experts on this subject based on the ideXlab platform.
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Water exchange vs. Water Immersion during colonoscope insertion.
The American journal of gastroenterology, 2014Co-Authors: Douglas K. RexAbstract:Water exchange (Water infusion with Water removal primarily during insertion) and Water Immersion (Water infusion with Water removal during withdrawal) reduce patient discomfort during colonoscope insertion compared with air insufflation, and represent a major achievement in colonoscopy. Hsieh et al. found that Water exchange, relative to Water Immersion, resulted in more painless insertions to the cecum and improved adenoma detection in the right colon. However, Water exchange is also associated with better bowel cleansing and longer insertion and procedure times. These factors are not specific to Water exchange, but could account for all or part of the better results with Water exchange. Additional controlled investigation is needed to define the benefits of Water exchange compared with Water Immersion.
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Water Immersion simplifies cecal intubation in patients with redundant colons and previous incomplete colonoscopies
Gastrointestinal Endoscopy, 2012Co-Authors: Krishna C Vemulapalli, Douglas K. RexAbstract:Background Interest in effective ways to complete colon examinations in patients who had previously undergone failed colonoscopies has increased recently. Objective To determine whether Water Immersion decreased the need for ancillary equipment to achieve cecal intubation in patients who had previously undergone incomplete colonoscopies. Design Retrospective cohort study. Setting Tertiary academic center. Patients A total of 345 consecutive patients referred to a tertiary center for the indication of a previous incomplete colonoscopy. Interventions Colonoscopy with or without Water Immersion insertion. Main Outcome Measurements Cecal intubation rates, type of equipment, and maneuvers used. Results Cecal intubation was achieved in 332 of 345 patients (96.2%) and was similar in those with and without Water Immersion (170/178, 95.5% vs 162/167, 97%, P = .58). An external straightening device was used in 6 of 178 cases with Water Immersion (3.4%) compared with 25 of 168 cases with air insufflation (15%) ( P P P = .01). Limitations Retrospective review; single-center, single-endoscopist study. Conclusion Water Immersion decreases the need for external straightening devices and position change maneuvers in patients with redundant colons and previously incomplete colonoscopies.
