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  1 / 1934 MEDLINE  
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[PMID]:28463818
[Au] Autor:Rocchi L; Erro R; Antelmi E; Berardelli A; Tinazzi M; Liguori R; Bhatia K; Rothwell J
[Ad] Endereço:Sobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, University College London, WC1N 3BG London, United Kingdom; Department of Neurology and Psychiatry, University of Rome "Sapienza", Viale dell'Universita' 30, 00185 Rome, Italy. Electronic address: l.rocchi@ucl.ac
[Ti] Título:High frequency somatosensory stimulation increases sensori-motor inhibition and leads to perceptual improvement in healthy subjects.
[So] Source:Clin Neurophysiol;128(6):1015-1025, 2017 06.
[Is] ISSN:1872-8952
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: High frequency repetitive somatosensory stimulation (HF-RSS), which is a patterned electric stimulation applied to the skin through surface electrodes, improves two-point discrimination, somatosensory temporal discrimination threshold (STDT) and motor performance in humans. However, the mechanisms which underlie these changes are still unknown. In particular, we hypothesize that refinement of inhibition might be responsible for the improvement in spatial and temporal perception. METHODS: Fifteen healthy subjects underwent 45min of HF-RSS. Before and after the intervention several measures of inhibition in the primary somatosensory area (S1), such as paired-pulse somatosensory evoked potentials (pp-SEP), high-frequency oscillations (HFO), and STDT were tested, as well as tactile spatial acuity and short intracortical inhibition (SICI). RESULTS: HF-RSS increased inhibition in S1 tested by pp-SEP and HFO; these changes were correlated with improvement in STDT. HF-RSS also enhanced bumps detection, while there was no change in grating orientation test. Finally there was an increase in SICI, suggesting widespread changes in cortical sensorimotor interactions. CONCLUSIONS: These findings suggest that HF-RSS can improve spatial and temporal tactile abilities by increasing the effectiveness of inhibitory interactions in the somatosensory system. Moreover, HF-RSS induces changes in cortical sensorimotor interaction. SIGNIFICANCE: HF-RSS is a repetitive electric stimulation technique able to modify the effectiveness of inhibitory circuitry in the somatosensory system and primary motor cortex.
[Mh] Termos MeSH primário: Potenciais Somatossensoriais Evocados
Inibição Neural
Córtex Sensório-Motor/fisiologia
Percepção do Tato
[Mh] Termos MeSH secundário: Feminino
Seres Humanos
Masculino
Meia-Idade
Limiar Sensorial
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:180306
[Lr] Data última revisão:
180306
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE


  2 / 1934 MEDLINE  
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[PMID]:29405684
[Au] Autor:Leonovich SA; Filimonova SA
[Ti] Título:[The quill mite Syringophilopsis fringilla (Fritsch) (Acari: Trombidiformes: Syringophilidae): The structure of receptor organs providing feeding of the parasite inside the feather quill].
[So] Source:Parazitologiia;51(2):121-31, 2017 Mar-Apr.
[Is] ISSN:0031-1847
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:The structure of sensory organs situated on palps and inside the cheliceral stylet of the quill mite Sringophilopsis fringilla (Fritsch, 1958) was examined in scanning and transmitting electron microscopes. Eight sensilla of 3 types were revealed on palptarsus, including two contact chemo-mechanosensory sensilla, a single distant chemosensory (probably olfactory) sensillum, and 5 tactile mechanosensitive sensilla. All other sensilla situated on basas parts of the palp and on the outer surface of gnathosoma are represented by tactile mechanoreceptors. A proprioceptor sensillum was revealed in the movable digit of the chelicera; modified cilia of dendrites of 5 sensory neurons run in the inner non-sclerotized core of the stylet, ending at different levels as electron-dense rods connected with the sclerotized wall of the stylet. The authors assume that the proprioceptor sensillum of the stylet detects the pressing force of the movable digit on the inner wall of the quill during piercing process, while papal sensilla determine the optimal place for piercing.
[Mh] Termos MeSH primário: Plumas/parasitologia
Mecanorreceptores/ultraestrutura
Ácaros/ultraestrutura
Passeriformes/parasitologia
Sensilas/ultraestrutura
[Mh] Termos MeSH secundário: Animais
Feminino
Linfa/parasitologia
Mecanorreceptores/fisiologia
Ácaros/fisiologia
Sensilas/fisiologia
Olfato/fisiologia
Percepção do Tato/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180222
[Lr] Data última revisão:
180222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180207
[St] Status:MEDLINE


  3 / 1934 MEDLINE  
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[PMID]:29364988
[Au] Autor:Lee Masson H; Op de Beeck H
[Ad] Endereço:Department of Brain and Cognition, KU Leuven, Leuven, Belgium.
[Ti] Título:Socio-affective touch expression database.
[So] Source:PLoS One;13(1):e0190921, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Socio-affective touch communication conveys a vast amount of information about emotions and intentions in social contexts. In spite of the complexity of the socio-affective touch expressions we use daily, previous studies addressed only a few aspects of social touch mainly focusing on hedonics, such as stroking, leaving a wide range of social touch behaviour unexplored. To overcome this limit, we present the Socio-Affective Touch Expression Database (SATED), which includes a large range of dynamic interpersonal socio-affective touch events varying in valence and arousal. The original database contained 26 different social touch expressions each performed by three actor pairs. To validate each touch expression, we conducted two behavioural experiments investigating perceived naturalness and affective values. Based on the rated naturalness and valence, 13 socio-affective touch expressions along with 12 corresponding non-social touch events were selected as a complete set, achieving 75 video clips in total. Moreover, we quantified motion energy for each touch expression to investigate its intrinsic correlations with perceived affective values and its similarity among actor- and action-pairs. As a result, the touch expression database is not only systematically defined and well-controlled, but also spontaneous and natural, while eliciting clear affective responses. This database will allow a fine-grained investigation of complex interpersonal socio-affective touch in the realm of social psychology and neuroscience along with potential application areas in affective computing and neighbouring fields.
[Mh] Termos MeSH primário: Afeto/fisiologia
Bases de Dados Factuais
Tato/fisiologia
[Mh] Termos MeSH secundário: Adulto
Nível de Alerta/fisiologia
Emoções/fisiologia
Feminino
Seres Humanos
Relações Interpessoais
Masculino
Estimulação Física
Comportamento Social
Percepção do Tato/fisiologia
Gravação em Vídeo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; VALIDATION STUDIES
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180209
[Lr] Data última revisão:
180209
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180125
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190921


  4 / 1934 MEDLINE  
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[PMID]:28947578
[Au] Autor:Crollen V; Lazzouni L; Rezk M; Bellemare A; Lepore F; Collignon O
[Ad] Endereço:Centre for Mind/Brain Science, University of Trento, 38123 Mattarello TN, Italy, virginie.crollen@unitn.it olivier.collignon@uclouvain.be.
[Ti] Título:Visual Experience Shapes the Neural Networks Remapping Touch into External Space.
[So] Source:J Neurosci;37(42):10097-10103, 2017 Oct 18.
[Is] ISSN:1529-2401
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Localizing touch relies on the activation of skin-based and externally defined spatial frames of reference. Psychophysical studies have demonstrated that early visual deprivation prevents the automatic remapping of touch into external space. We used fMRI to characterize how visual experience impacts the brain circuits dedicated to the spatial processing of touch. Sighted and congenitally blind humans performed a tactile temporal order judgment (TOJ) task, either with the hands uncrossed or crossed over the body midline. Behavioral data confirmed that crossing the hands has a detrimental effect on TOJ judgments in sighted but not in early blind people. Crucially, the crossed hand posture elicited enhanced activity, when compared with the uncrossed posture, in a frontoparietal network in the sighted group only. Psychophysiological interaction analysis revealed, however, that the congenitally blind showed enhanced functional connectivity between parietal and frontal regions in the crossed versus uncrossed hand postures. Our results demonstrate that visual experience scaffolds the neural implementation of the location of touch in space. In daily life, we seamlessly localize touch in external space for action planning toward a stimulus making contact with the body. For efficient sensorimotor integration, the brain has therefore to compute the current position of our limbs in the external world. In the present study, we demonstrate that early visual deprivation alters the brain activity in a dorsal parietofrontal network typically supporting touch localization in the sighted. Our results therefore conclusively demonstrate the intrinsic role that developmental vision plays in scaffolding the neural implementation of touch perception.
[Mh] Termos MeSH primário: Cegueira/fisiopatologia
Lobo Frontal/fisiologia
Rede Nervosa/fisiologia
Lobo Parietal/fisiologia
Percepção Espacial/fisiologia
Percepção do Tato/fisiologia
[Mh] Termos MeSH secundário: Adulto
Cegueira/diagnóstico por imagem
Feminino
Lobo Frontal/diagnóstico por imagem
Seres Humanos
Imagem por Ressonância Magnética/métodos
Masculino
Meia-Idade
Rede Nervosa/diagnóstico por imagem
Lobo Parietal/diagnóstico por imagem
Estimulação Física/métodos
Tempo de Reação/fisiologia
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171027
[Lr] Data última revisão:
171027
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170927
[St] Status:MEDLINE
[do] DOI:10.1523/JNEUROSCI.1213-17.2017


  5 / 1934 MEDLINE  
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[PMID]:28719619
[Au] Autor:Alam U; Jeziorska M; Petropoulos IN; Asghar O; Fadavi H; Ponirakis G; Marshall A; Tavakoli M; Boulton AJM; Efron N; Malik RA
[Ad] Endereço:Diabetes & Endocrinology Research, Department of Eye & Vision Sciences, Institute of Ageing and Chronic Disease, University of Liverpool and Aintree University Hospital NHS Foundation Trust, Liverpool, United Kingdom.
[Ti] Título:Diagnostic utility of corneal confocal microscopy and intra-epidermal nerve fibre density in diabetic neuropathy.
[So] Source:PLoS One;12(7):e0180175, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: Corneal confocal microscopy (CCM) is a rapid, non-invasive, reproducible technique that quantifies small nerve fibres. We have compared the diagnostic capability of CCM against a range of established measures of nerve damage in patients with diabetic neuropathy. METHODS: In this cross sectional study, thirty subjects with Type 1 diabetes without neuropathy (T1DM), thirty one T1DM subjects with neuropathy (DSPN) and twenty seven non-diabetic healthy control subjects underwent detailed assessment of neuropathic symptoms and neurologic deficits, quantitative sensory testing (QST), electrophysiology, skin biopsy and corneal confocal microscopy (CCM). RESULTS: Subjects with DSPN were older (C vs T1DM vs DSPN: 41.0±14.9 vs 38.8±12.5 vs 53.3±11.9, P = 0.0002), had a longer duration of diabetes (P<0.0001), lower eGFR (P = 0.006) and higher albumin-creatinine ratio (P = 0.03) with no significant difference for HbA1c, BMI, lipids and blood pressure. Patients with DSPN were representative of subjects with diabetic neuropathy with clinical signs and symptoms of neuropathy and greater neuropathy deficits quantified by QST, electrophysiology, intra-epidermal nerve fibre density and CCM. Corneal nerve fibre density (CNFD) (Spearman's Rho = 0.60 P<0.0001) and IENFD (Spearman's Rho = 0.56 P<0.0001) were comparable when correlated with peroneal nerve conduction velocity. For the diagnosis of diabetic neuropathy the sensitivity for CNFD was 0.77 and specificity was 0.79 with an area under the ROC curve of 0.81. IENFD had a diagnostic sensitivity of 0.61, specificity of 0.80 and area under the ROC curve of 0.73. CONCLUSIONS: CCM is a valid accurate non-invasive method to identify small nerve fibre pathology and is able to diagnose DPN.
[Mh] Termos MeSH primário: Córnea/diagnóstico por imagem
Neuropatias Diabéticas/diagnóstico por imagem
Epiderme/inervação
Microscopia Confocal
Fibras Nervosas/patologia
[Mh] Termos MeSH secundário: Adulto
Córnea/patologia
Estudos Transversais
Neuropatias Diabéticas/patologia
Neuropatias Diabéticas/fisiopatologia
Feminino
Seres Humanos
Masculino
Meia-Idade
Curva ROC
Temperatura Ambiente
Percepção do Tato
Vibração
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170927
[Lr] Data última revisão:
170927
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170719
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0180175


  6 / 1934 MEDLINE  
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[PMID]:28500064
[Au] Autor:Maitre NL; Stark AR; McCoy Menser CC; Chorna OD; France DJ; Key AF; Wilkens K; Moore-Clingenpeel M; Wilkes DM; Bruehl S
[Ad] Endereço:Center for Perinatal Research, Nationwide Children's Hospital, Columbus, Ohio, USA.
[Ti] Título:Cry presence and amplitude do not reflect cortical processing of painful stimuli in newborns with distinct responses to touch or cold.
[So] Source:Arch Dis Child Fetal Neonatal Ed;102(5):F428-F433, 2017 Sep.
[Is] ISSN:1468-2052
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: Newborns requiring hospitalisation frequently undergo painful procedures. Prevention of pain in infants is of prime concern because of adverse associations with physiological and neurological development. However, pain mitigation is currently guided by behavioural observation assessments that have not been validated against direct evidence of pain processing in the brain. The aim of this study was to determine whether cry presence or amplitude is a valid indicator of pain processing in newborns. DESIGN: Prospective observational cohort. SETTING: Newborn nursery. PATIENTS: Healthy infants born at >37 weeks and <42 weeks gestation. INTERVENTIONS: We prospectively studied newborn cortical responses to light touch, cold and heel stick, and the amplitude of associated infant vocalisations using our previously published paradigms of time-locked electroencephalogram (EEG) with simultaneous audio recordings. RESULTS: Latencies of cortical peak responses to each of the three stimuli type were significantly different from each other. Of 54 infants, 13 (24%), 19 (35%) and 35 (65%) had cries in response to light touch, cold and heel stick, respectively. Cry in response to non-painful stimuli did not predict cry in response to heel stick. All infants with EEG data had measurable pain responses to heel stick, whether they cried or not. There was no association between presence or amplitude of cries and cortical nociceptive amplitudes. CONCLUSIONS: In newborns with distinct brain responses to light touch, cold and pain, cry presence or amplitude characteristics do not provide adequate behavioural markers of pain signalling in the brain. New bedside assessments of newborn pain may need to be developed using brain-based methodologies as benchmarks in order to provide optimal pain mitigation.
[Mh] Termos MeSH primário: Choro
Eletroencefalografia
Potenciais Somatossensoriais Evocados
Percepção da Dor
Percepção do Tato
[Mh] Termos MeSH secundário: Estudos de Coortes
Temperatura Baixa
Feminino
Calcanhar
Seres Humanos
Recém-Nascido
Masculino
Flebotomia
[Pt] Tipo de publicação:JOURNAL ARTICLE; OBSERVATIONAL STUDY
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171024
[Lr] Data última revisão:
171024
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:170514
[St] Status:MEDLINE
[do] DOI:10.1136/archdischild-2016-312279


  7 / 1934 MEDLINE  
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[PMID]:28434802
[Au] Autor:Severson KS; Xu D; Van de Loo M; Bai L; Ginty DD; O'Connor DH
[Ad] Endereço:Kavli Neuroscience Discovery Institute, Brain Science Institute, The Solomon H. Snyder Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Neuroscience Training Program, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
[Ti] Título:Active Touch and Self-Motion Encoding by Merkel Cell-Associated Afferents.
[So] Source:Neuron;94(3):666-676.e9, 2017 May 03.
[Is] ISSN:1097-4199
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Touch perception depends on integrating signals from multiple types of peripheral mechanoreceptors. Merkel-cell associated afferents are thought to play a major role in form perception by encoding surface features of touched objects. However, activity of Merkel afferents during active touch has not been directly measured. Here, we show that Merkel and unidentified slowly adapting afferents in the whisker system of behaving mice respond to both self-motion and active touch. Touch responses were dominated by sensitivity to bending moment (torque) at the base of the whisker and its rate of change and largely explained by a simple mechanical model. Self-motion responses encoded whisker position within a whisk cycle (phase), not absolute whisker angle, and arose from stresses reflecting whisker inertia and activity of specific muscles. Thus, Merkel afferents send to the brain multiplexed information about whisker position and surface features, suggesting that proprioception and touch converge at the earliest neural level.
[Mh] Termos MeSH primário: Potenciais de Ação/fisiologia
Células de Merkel/fisiologia
Neurônios Aferentes/fisiologia
Propriocepção/fisiologia
Córtex Somatossensorial/fisiologia
Percepção do Tato/fisiologia
[Mh] Termos MeSH secundário: Animais
Eletromiografia
Cinestesia/fisiologia
Camundongos
Optogenética
Tato
Vibrissas
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170728
[Lr] Data última revisão:
170728
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170425
[St] Status:MEDLINE


  8 / 1934 MEDLINE  
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[PMID]:28407000
[Au] Autor:Kolarik AJ; Scarfe AC; Moore BC; Pardhan S
[Ad] Endereço:Vision and Eye Research Unit (VERU), Postgraduate Medical Institute, Anglia Ruskin University, Cambridge, United Kingdom.
[Ti] Título:Blindness enhances auditory obstacle circumvention: Assessing echolocation, sensory substitution, and visual-based navigation.
[So] Source:PLoS One;12(4):e0175750, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Performance for an obstacle circumvention task was assessed under conditions of visual, auditory only (using echolocation) and tactile (using a sensory substitution device, SSD) guidance. A Vicon motion capture system was used to measure human movement kinematics objectively. Ten normally sighted participants, 8 blind non-echolocators, and 1 blind expert echolocator navigated around a 0.6 x 2 m obstacle that was varied in position across trials, at the midline of the participant or 25 cm to the right or left. Although visual guidance was the most effective, participants successfully circumvented the obstacle in the majority of trials under auditory or SSD guidance. Using audition, blind non-echolocators navigated more effectively than blindfolded sighted individuals with fewer collisions, lower movement times, fewer velocity corrections and greater obstacle detection ranges. The blind expert echolocator displayed performance similar to or better than that for the other groups using audition, but was comparable to that for the other groups using the SSD. The generally better performance of blind than of sighted participants is consistent with the perceptual enhancement hypothesis that individuals with severe visual deficits develop improved auditory abilities to compensate for visual loss, here shown by faster, more fluid, and more accurate navigation around obstacles using sound.
[Mh] Termos MeSH primário: Cegueira/fisiopatologia
Localização de Som
Processamento Espacial
[Mh] Termos MeSH secundário: Adulto
Fenômenos Biomecânicos
Feminino
Seres Humanos
Masculino
Meia-Idade
Percepção de Movimento
Percepção do Tato
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170504
[Lr] Data última revisão:
170504
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170414
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0175750


  9 / 1934 MEDLINE  
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[PMID]:28374008
[Au] Autor:Bieler M; Sieben K; Cichon N; Schildt S; Röder B; Hanganu-Opatz IL
[Ad] Endereço:Developmental Neurophysiology, Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf , Hamburg 20251, Germany.
[Ti] Título:Rate and Temporal Coding Convey Multisensory Information in Primary Sensory Cortices.
[So] Source:eNeuro;4(2), 2017 Mar-Apr.
[Is] ISSN:2373-2822
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Optimal behavior and survival result from integration of information across sensory systems. Modulation of network activity at the level of primary sensory cortices has been identified as a mechanism of cross-modal integration, yet its cellular substrate is still poorly understood. Here, we uncover the mechanisms by which individual neurons in primary somatosensory (S1) and visual (V1) cortices encode visual-tactile stimuli. For this, simultaneous extracellular recordings were performed from all layers of the S1 barrel field and V1 in Brown Norway rats and units were clustered and assigned to pyramidal neurons (PYRs) and interneurons (INs). We show that visual-tactile stimulation modulates the firing rate of a relatively low fraction of neurons throughout all cortical layers. Generally, it augments the firing of INs and decreases the activity of PYRs. Moreover, bimodal stimulation shapes the timing of neuronal firing by strengthening the phase-coupling between neuronal discharge and theta-beta band network oscillations as well as by modulating spiking onset. Sparse direct axonal projections between neurons in S1 and V1 seem to time the spike trains between the two cortical areas and, thus, may act as a substrate of cross-modal modulation. These results indicate that few cortical neurons mediate multisensory effects in primary sensory areas by directly encoding cross-modal information by their rate and timing of firing.
[Mh] Termos MeSH primário: Interneurônios/fisiologia
Células Piramidais/fisiologia
Córtex Somatossensorial/fisiologia
Percepção do Tato/fisiologia
Córtex Visual/fisiologia
Percepção Visual/fisiologia
[Mh] Termos MeSH secundário: Potenciais de Ação
Animais
Feminino
Ácido Glutâmico/metabolismo
Interneurônios/citologia
Masculino
Vias Neurais/citologia
Vias Neurais/fisiologia
Células Piramidais/citologia
Ratos
Córtex Somatossensorial/citologia
Ritmo Teta/fisiologia
Fatores de Tempo
Córtex Visual/citologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
3KX376GY7L (Glutamic Acid)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171027
[Lr] Data última revisão:
171027
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170405
[St] Status:MEDLINE


  10 / 1934 MEDLINE  
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[PMID]:28372939
[Au] Autor:Bendas J; Georgiadis JR; Ritschel G; Olausson H; Weidner K; Croy I
[Ad] Endereço:Department for Psychotherapy and Psychosomatic Medicine, Dresden University Hospital, Technische Universität Dresden, Dresden, Germany. Electronic address: johanna.bendas@gmail.com.
[Ti] Título:C-Tactile Mediated Erotic Touch Perception Relates to Sexual Desire and Performance in a Gender-Specific Way.
[So] Source:J Sex Med;14(5):645-653, 2017 May.
[Is] ISSN:1743-6109
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Unmyelinated low-threshold mechanoreceptors-the so-called C-tactile (CT) afferents-play a crucial role in the perception and conduction of caressing and pleasant touch sensations and significantly contribute to the concept of erotic touch perception. AIM: To investigate the relations between sexual desire and sexual performance and the perception of touch mediated by CT afferents. METHODS: Seventy healthy participants (28 men, 42 women; mean age ± SD = 24.84 ± 4.08 years, range = 18-36 years) underwent standardized and highly controlled stroking stimulation that varied in the amount of CT fiber stimulation by changing stroking velocity (CT optimal = 1, 3 and 10 cm/s; CT suboptimal = 0.1, 0.3, and 30 cm/s). Participants rated the perceived pleasantness, eroticism, and intensity of the applied tactile stimulation on a visual analog scale, completed the Sexual Desire Inventory, and answered questions about sexual performance. OUTCOMES: Ratings of perceived eroticism of touch were related to self-report levels of sexual desire and sexual performance. RESULTS: Pleasantness and eroticism ratings showed similar dependence on stroking velocity that aligned with the activity of CT afferents. Erotic touch perception was related to sexual desire and sexual performance in a gender-specific way. In women, differences in eroticism ratings between CT optimal and suboptimal velocities correlated positively with desire for sexual interaction. In contrast, in men, this difference correlated to a decreased frequency and longer duration of partnered sexual activities. CLINICAL IMPLICATIONS: The present results lay the foundation for future research assessing these relations in patients with specific impairments of sexual functioning (eg, hypoactive sexual desire disorder). STRENGTHS AND LIMITATIONS: The strength of the study is the combination of standardized neurophysiologic methods and behavioral data. A clear limitation of the study design is the exclusion of exact data on the female menstrual cycle and the recruitment of an inhomogeneous sample concerning sexual orientation. CONCLUSION: The present results provide further evidence that unmyelinated CT afferents play a role in the complex mechanism of erotic touch perception. The ability to differentiate between CT optimal and suboptimal stimuli relates to sexual desire and performance in a gender-specific way. Bendas J, Georgiadis JR, Ritschel G. C-Tactile Mediated Erotic Touch Perception Relates to Sexual Desire and Performance in a Gender-Specific Way. J Sex Med 2017;14:645-653.
[Mh] Termos MeSH primário: Libido/fisiologia
Percepção do Tato/fisiologia
Tato/fisiologia
[Mh] Termos MeSH secundário: Adolescente
Adulto
Feminino
Seres Humanos
Masculino
Mecanorreceptores/fisiologia
Estimulação Física/métodos
Fatores Sexuais
Fatores de Tempo
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171023
[Lr] Data última revisão:
171023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170405
[St] Status:MEDLINE



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