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Sympathetic skin response

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https://www.readbyqxmd.com/read/28544033/impaired-neurovascular-reactivity-in-the-microvasculature-of-pregnant-women-with-preeclampsia
#1
Karine Ferreira Agra, Isabelle Eunice Albuquerque Pontes, José Roberto da Silva, José Natal Figueiroa, Geraldine F Clough, João Guilherme Bezerra Alves
Preeclampsia (PE) is associated with maternal vascular dysfunction, leading to serious cardiovascular risk both during and following pregnancy. OBJECTIVE: To assess microvascular reactivity in pregnant women with PE. METHODS: A cross-sectional study was performed in 36 pregnant women with PE and 36 normotensive pregnant women (C) in the third trimester. Skin microvascular blood flow was measured using laser Doppler flowmetry at rest (RF), during the maximum hyperaemic response to brief arterial occlusion (MF) and during the sympathetically-mediated constrictor response to deep inspiratory breath hold (IBH)...
May 19, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/28537464/multi-domain-assessment-of-autonomic-function-in-spinal-cord-injury-using-a-modified-autonomic-reflex-screen
#2
Michael James Berger, Kurt Kimpinski, Katharine Dianne Currie, Hirmand Nouraei, Mahsa Sadeghi, Andrei V Krassioukov
The purpose of this study was to characterize autonomic lesions in participants with spinal cord injury (SCI; n=10) using an autonomic reflex screen, incorporating sudomotor, cardiovagal and sympathetic adrenergic tests, as well as hemodynamic responses to head-up tilt (HUT). Hemodynamic responses were compared to healthy controls (n=20) and previously published normative cutoffs in order better identify autonomic impairments. Sympathetic skin responses (SSRs), heart rate response to deep breathing (HRDB) and heart rate and beat-to-beat blood pressure responses to Valsalva maneuver (VM) and HUT were measured...
May 24, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28528745/measurement-of-electrochemical-conductance-of-penile-skin-using-sudoscan-%C3%A2-a-new-tool-to-assess-neurogenic-impotence
#3
Jean-Pascal Lefaucheur
OBJECTIVES: To investigate the value of electrochemical skin conductance (ESC) measurement at penile level using Sudoscan(®) for the diagnosis of neurogenic impotence in diabetics. METHODS: The following neurophysiological parameters were assessed in 25 male diabetics who complained of impotence and 25 age-matched normal male subjects without erectile dysfunction (age range: 29-70 years): ESC, sympathetic skin responses (SSR), warm detection thresholds (WDT), and cold detection thresholds (CDT) for the penis and the feet, vibration detection thresholds (VDT) for the penis, and sensory nerve conduction study of the dorsal nerve of the penis (DNP) with sensory nerve action potential (SNAP) recording...
May 18, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28522768/a-model-for-in-vivo-analysis-of-sudomotor-sympathetic-c-fiber-activation-and-human-sweat-gland-output
#4
Gary W Mack
Quantitative assessment of small fiber peripheral neuropathy often involves an evaluation of the interaction between the C-fiber sudomotor nerve and local sweat rate (SR). Typically, some sort of quantitative sudomotor axon reflex test (QSART) is performed to aid in diagnosing small fiber dysfunction. The currently used QSART demonstrates only moderate test-retest reliability and therefore limits its usefulness in tracking small fiber dysfunction. A new experimental model to examine small C-fiber function in the skin using intradermal electrical stimulation and simultaneous monitoring of SR is proposed...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28507735/does-dysfunction-of-the-autonomic-nervous-system-affect-success-of-renal-denervation-in-reducing-blood-pressure
#5
Lisa Fricke, David Petroff, Steffen Desch, Philipp Lurz, Sebastian Reinhardt, Melanie Sonnabend, Joseph Classen, Petra Baum
OBJECTIVES: Renal denervation is an interventional approach aiming to reduce high blood pressure. Its efficacy is subject of controversial debate. We analyzed autonomic function in patients undergoing renal denervation to identify responders. METHODS: A total of 21 patients with treatment-resistant hypertension scheduled for renal denervation were included. Heart rate variability, pupillary function and sympathetic skin response were examined prior to intervention...
2017: SAGE Open Medicine
https://www.readbyqxmd.com/read/28501968/effect-of-parachute-jump-in-the-psychophysiological-response-of-soldiers-in-urban-combat
#6
Joaquín Sánchez-Molina, José J Robles-Pérez, Vicente J Clemente-Suárez
The study of organic and psychological response during combat situations has been poorly reported despite its importance for soldiers training and specific instruction, so it was proposed as aim of the present investigation to analyze the effect of a tactical parachute simulated jump in psycho-physiological response of paratroopers' warfighters during an urban combat simulation. 19 male paratroopers (31.9 ± 6.2 year old; 173.6 ± 5.3 cm; 73.8 ± 8.3 Kg) of the Spanish Army were divided in two groups: parachute jump group (n:11) that conducted a simulated parachute jump and a urban combat maneuver and a non-parachute jump group (n:8) that only conducted an urban combat maneuver...
June 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28488950/is-ross-syndrome-an-autoimmune-entity-a-case-series-of-11-patients
#7
Ajay Kumar Mishra, Meban Kharkongor, Cijoy K Kuriakose, Anu Anna George, Dincy Peter, Ronal Albert Benton Carey, Vivek Mathew, Samuel George Hansdak
BACKGROUND: Ross syndrome is diagnosed by the presence of segmental anhidrosis, areflexia, and tonic pupils. Fewer than 60 cases have been described in literature so far. There have been reports of presence of antibodies in such patients, suggesting an autoimmune pathogenesis. METHODS: We describe the clinical profile in this case series of 11 patients with Ross syndrome and discuss the current status of autoimmunity in its pathogenesis and the management. RESULTS: Of the 11 patients with Ross syndrome there was an almost equal sex distribution (male:female ratio was 1...
May 2017: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28477375/oral-l-tyrosine-supplementation-augments-the-vasoconstriction-response-to-whole-body-cooling-in-older-adults
#8
James A Lang, Kevin A Smaller
L-tyrosine is the primary substrate for noradrenaline biosynthesis within sympathetic axon terminals. Under stressful conditions requiring increased catecholamine production, axonal L-tyrosine concentration may limit the full expression of the sympathetic effector response and this may be particularly evident in older adults. We hypothesize that oral L-tyrosine supplementation will increase the sympathetic response to whole-body cooling and muscle metaboreflex activation. In a randomized, double-blind design, eleven young (Y = 24 ± 1 years) and eleven older (O = 68 ± 4 years) participants ingested either 150 mg kg(-1) of L-tyrosine or placebo prior to commencing 30 minutes of whole-body cooling to induce a gradual decline in skin temperature from 34 to 30...
May 5, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28471954/sympathetic-skin-response-and-heart-rate-variability-in-predicting-autonomic-disorders-in-patients-with-parkinson-disease
#9
Jiang-Qiong Ke, Sheng-Min Shao, Yuan-Yuan Zheng, Fang-Wang Fu, Guo-Qing Zheng, Chun-Feng Liu
The purpose of this study was to evaluate sympathetic skin response (SSR) and heart rate variability (HRV) in determining autonomic nervous system (ANS) involvement in patients with Parkinson disease (PD). Forty-eight idiopathic PD patients and 30 healthy controls participated in this study. SSR, HRV, Unified Parkinson's Disease Rating Scale (UPDRS) III, the Scales for outcomes in Parkinson's Disease-Autonomic (SCOPA-AUT), Hoehn and Yahr (H&Y) scale were evaluated. Absent lower limb SSR was determined unilaterally in 2, bilaterally in 1 of 3 advanced PD patients; there was significant difference between PD and control groups in terms of the SSR (P < 0...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28458648/pitch-syntax-violations-are-linked-to-greater-skin-conductance-changes-relative-to-timbral-violations-the-predictive-role-of-the-reward-system-in-perspective-of-cortico-subcortical-loops
#10
Edward J Gorzelańczyk, Piotr Podlipniak, Piotr Walecki, Maciej Karpiński, Emilia Tarnowska
According to contemporary opinion emotional reactions to syntactic violations are due to surprise as a result of the general mechanism of prediction. The classic view is that, the processing of musical syntax can be explained by activity of the cerebral cortex. However, some recent studies have indicated that subcortical brain structures, including those related to the processing of emotions, are also important during the processing of syntax. In order to check whether emotional reactions play a role in the processing of pitch syntax or are only the result of the general mechanism of prediction, the comparison of skin conductance levels reacting to three types of melodies were recorded...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28458182/the-attribution-of-animacy-and-agency-in-frontotemporal-dementia-versus-alzheimer-s-disease
#11
Sylvia S Fong, Pongsatorn Paholpak, Madelaine Daianu, Mariel B Deutsch, Brandalyn C Riedel, Andrew R Carr, Elvira E Jimenez, Michelle M Mather, Paul M Thompson, Mario F Mendez
Impaired attribution of animacy (state of living or being sentient) and of agency (capability of intrinsically-driven action) may underlie social behavior disturbances in behavioral variant frontotemporal dementia (bvFTD). We presented the Heider and Simmel film of moving geometric shapes to 11 bvFTD patients, 11 Alzheimer's disease (AD) patients, and 12 healthy controls (HCs) and rated their recorded verbal responses for animacy attribution and agency attribution. All participants had skin conductance (SC) continuously recorded while viewing the film, and all dementia participants underwent magnetic resonance imaging (MRI) for regions of interest...
April 8, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28455665/cross-coupling-vestibular-stimulation-motion-sickness-and-the-vestibulo-sympathetic-reflex
#12
Fausto Romano, Nicoletta Caramia, Dominik Straumann, Eugene Nalivaiko, Giovanni Bertolini
Motion sickness is associated with a variety of autonomic symptoms, presumably due to proximity or functional interconnectivity between the autonomic centers in the brainstem and the vestibular system. A direct influence of the vestibular system on cardiovascular variables, defined as the vestibulo-sympathetic reflex, has been reported previously. Our aim was to investigate the sudomotor components of the autonomic responses associated with motion sickness during passive cross-coupling stimulation ("roll while rotating")...
April 28, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28452146/autonomic-testing-for-prediction-of-competition-performance-in-paralympic-athletes
#13
J W Squair, A A Phillips, K D Currie, C Gee, A V Krassioukov
While we now appreciate that autonomic dysfunction can impact wheelchair rugby performance, this is currently not being assessed during classification, largely due to lack of a standardized and evidence-based strategy to assess autonomic function. Our aim, therefore, was to establish the optimal autonomic testing protocol that best predicts cardiovascular capacity during competition by comprehensively examining autonomic function in elite wheelchair rugby athletes with cervical SCI and thereby enhance the standardized classification...
April 27, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28444963/the-influence-of-frontal-alpha-asymmetry-on-the-processing-of-approach-and-withdrawal-related-stimuli-a-multichannel-psychophysiology-study
#14
Dirk Adolph, Michael von Glischinski, André Wannemüller, Jürgen Margraf
The approach-withdrawal model of hemispheric activation suggests that left frontal cortical areas mediate approach, while right frontal cortical areas mediate withdrawal motivation. Within this framework, the present study investigates the association of frontal cortical asymmetry with attentional and emotional responses toward approach- and withdrawal-related emotional stimuli. Resting frontal asymmetry was measured from 43 students before they passively viewed negative, neutral, and positive emotional pictures...
April 26, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28405788/electroneuromyographic-findings-in-pseudoexfoliation-syndrome
#15
Deniz Turgut Coban, Tuncay Cakir, Muhammet Kazim Erol, Gulsum Dogan, Berna Dogan, Meral Bilgilisoy Filiz, Naciye Fusun Toraman
PURPOSE: To examine peripheral electroneuromyographic findings in patients with ocular pseudoexfoliation syndrome (PEX) and to compare them controls without PEX. METHODS: A case-control study design was used to examine 31 patients with PEX and compare the findings with those of 31 age- and sex-matched healthy controls. All patients underwent complete ophthalmologic examination that included peripheral electroneuromyography examination. Motor and sensorial nerve conduction of the median, ulnar, tibial, peroneal, and sural nerve and the sympathetic skin response were measured...
April 12, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28404850/stress-hormones-epinephrine-and-corticosterone-selectively-modulate-hsv-1-and-hsv-2-productive-infection-in-adult-sympathetic-but-not-sensory-neurons
#16
Angela M Ives, Andrea S Bertke
Herpes simplex viruses 1 and 2 (HSV-1 and HSV-2) infect and establish latency in peripheral neurons, from which they can reactivate to cause recurrent disease throughout the life of the host. Stress is associated with exacerbation of clinical symptoms and induction of recurrences in humans and animal models. The viruses preferentially replicate and establish latency in different subtypes of sensory neurons, as well as in neurons of the autonomic nervous system that are highly responsive to stress hormones. To determine if stress-related hormones modulate productive HSV-1 and HSV-2 infection within sensory and autonomic neurons, we analyzed viral DNA and production of viral progeny after treatment of primary adult murine neuronal cultures with the stress hormones epinephrine and corticosterone...
April 12, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28377150/developmental-changes-in-autonomic-responses-are-associated-with-future-reward-punishment-expectations-a-study-of-sympathetic-skin-responses-in-the-markov-decision-task
#17
Hiromi Hosaka, Kakuro Aoyagi, Yoshimi Kaga, Hideaki Kanemura, Kanji Sugita, Masao Aihara
OBJECTIVE: Autonomic nervous system activity is recognized as a major component of emotional responses. Future reward/punishment expectations depend upon the process of decision making in the frontal lobe, which is considered to play an important role in executive function. The aim of this study was to investigate the relationship between autonomic responses and decision making during reinforcement tasks using sympathetic skin responses (SSR). METHODS: Nine adult and 9 juvenile (mean age, 10...
April 1, 2017: Brain & Development
https://www.readbyqxmd.com/read/28369282/recessive-dystrophic-epidermolysis-bullosa-results-in-painful-small-fibre-neuropathy
#18
Sofia von Bischhoffshausen, Dinka Ivulic, Paola Alvarez, Victor C Schuffeneger, Juan Idiaquez, Constanza Fuentes, Pilar Morande, Ignacia Fuentes, Francis Palisson, David L H Bennett, Margarita Calvo
Small fibres in the skin are vulnerable to damage in metabolic or toxic conditions such as diabetes mellitus or chemotherapy resulting in small fibre neuropathy and associated neuropathic pain. Whether injury to the most distal portion of sensory small fibres due to a primary dermatological disorder can cause neuropathic pain is still unclear. Recessive dystrophic epidermolysis bullosa (RDEB) is a rare condition in which mutations of proteins of the dermo-epidermal junction lead to cycles of blistering followed by regeneration of the skin...
March 28, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28368199/he-said-what-physiological-and-cognitive-responses-to-imagining-and-witnessing-outgroup-racism
#19
Francine Karmali, Kerry Kawakami, Elizabeth Page-Gould
Responses to outgroup racism can have serious implications for the perpetuation of bias, yet research examining this process is rare. The present research investigated self-reported, physiological, and cognitive responses among "experiencers" who witnessed and "forecasters" who imagined a racist comment targeting an outgroup member. Although previous research indicates that experiencers self-reported less distress and chose a racist partner more often than forecasters, the present results explored the possibility that experiencers may actually be distressed in such situation but regulate their initial affective reactions...
April 3, 2017: Journal of Experimental Psychology. General
https://www.readbyqxmd.com/read/28347833/skin-sympathetic-nerve-activity-precedes-the-onset-and-termination-of-paroxysmal-atrial-tachycardia-and-fibrillation
#20
Andrea Uradu, Juyi Wan, Anisiia Doytchinova, Keith C Wright, Andrew Y T Lin, Lan S Chen, Changyu Shen, Shien-Fong Lin, Thomas H Everett, Peng-Sheng Chen
BACKGROUND: Skin sympathetic nerve activity (SKNA) is useful for estimating sympathetic tone in humans. OBJECTIVE: The purpose of this study was to test the hypotheses that (1) increased SKNA is associated with the onset and termination of paroxysmal atrial tachycardia (AT) and atrial fibrillation (AF) and (2) sinoatrial node response to SKNA is reduced in patients with more frequent AT or AF episodes. METHODS: SKNA and electrocardiogram were recorded in 11 patients (4 men and 7 women; average age 66 ± 10 years), including 3 patients with AT (11 ± 18 episodes per patient) and 8 patients with AF (24 ± 26 episodes per patient)...
March 24, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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