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[PMID]:29374927
[Au] Autor:You X; Wei ZR
[Ad] Endereço:Department of Plastic Surgery, the Affiliated Hospital of Zunyi Medical College, Zunyi, 563000, China.
[Ti] Título:[Advances in the research of function of Merkel cells in tactile formation of skin].
[So] Source:Zhonghua Shao Shang Za Zhi;34(1):51-54, 2018 Jan 20.
[Is] ISSN:1009-2587
[Cp] País de publicação:China
[La] Idioma:chi
[Ab] Resumo:Skin is the largest sense organ of human, with many mechanoreceptor cells under epidermis or dermis of skin and Merkel cell is one of them. It has been confirmed that Merkel cells play an important role in the process of mechanical transmission of mammalian soft tactile stimulation. Researches showed that Merkel cells had close relation to tactile formation and functioned by Merkel cell-neurite complexes and ion channels Piezo2. This article reviews Merkel cells and the function, problem and prospect of Merkel cells in tactile formation.
[Mh] Termos MeSH primário: Células de Merkel/fisiologia
Tato/fisiologia
[Mh] Termos MeSH secundário: Animais
Epiderme
Seres Humanos
Canais Iônicos
Mecanorreceptores
Pele
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Ion Channels)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180306
[Lr] Data última revisão:
180306
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180129
[St] Status:MEDLINE
[do] DOI:10.3760/cma.j.issn.1009-2587.2018.01.010


  2 / 14248 MEDLINE  
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[PMID]:28744900
[Au] Autor:Barnard AA; Fincke OM; McPeek MA; Masly JP
[Ad] Endereço:Ecology & Evolutionary Biology Program, Department of Biology, University of Oklahoma, Norman, Oklahoma.
[Ti] Título:Mechanical and tactile incompatibilities cause reproductive isolation between two young damselfly species.
[So] Source:Evolution;71(10):2410-2427, 2017 10.
[Is] ISSN:1558-5646
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:External male reproductive structures have received considerable attention as a cause of reproductive isolation (RI), because the morphology of these structures often evolves rapidly between populations. This rapid evolution presents the potential for mechanical incompatibilities with heterospecific female structures during mating and could thus prevent interbreeding between nascent species. Although such mechanical incompatibilities have received little empirical support as a common cause of RI, the potential for mismatch of reproductive structures to cause RI due to incompatible species-specific tactile cues has not been tested. We tested the importance of mechanical and tactile incompatibilities in RI between Enallagma anna and E. carunculatum, two damselfly species that diverged within the past ∼250,000 years and currently hybridize in a sympatric region. We quantified 19 prezygotic and postzygotic RI barriers using both naturally occurring and laboratory-reared damselflies. We found incomplete mechanical isolation between the two pure species and between hybrid males and pure species females. Interestingly, in mating pairs for which mechanical isolation was incomplete, females showed greater resistance and refusal to mate with hybrid or heterospecific males compared to conspecific males. This observation suggests that tactile incompatibilities involving male reproductive structures can influence female mating decisions and form a strong barrier to gene flow in early stages of speciation.
[Mh] Termos MeSH primário: Odonatos/genética
Reprodução
Isolamento Reprodutivo
[Mh] Termos MeSH secundário: Animais
Feminino
Genitália Masculina/anatomia & histologia
Genitália Masculina/fisiologia
Hibridização Genética
Masculino
Preferência de Acasalamento Animal
Odonatos/fisiologia
Simpatria
Tato
[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:170727
[St] Status:MEDLINE
[do] DOI:10.1111/evo.13315


  3 / 14248 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 / 14248 MEDLINE  
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[PMID]:28467120
[Au] Autor:Müller BCN; Meinhardt J; Paulus M
[Ad] Endereço:a Department of Communication Science , Behavioural Science Institute, Radboud University Nijmegen , Nijmegen , The Netherlands.
[Ti] Título:Embodied Simulation of Others Being Touched in 1-Year-Old Infants.
[So] Source:Dev Neuropsychol;42(3):198-206, 2017.
[Is] ISSN:1532-6942
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The current study was designed to examine whether 1-year-old infants relate the perception of others' being touched to their own sensorimotor system, and whether they distinguish between animate and inanimate targets. During electroencephalography (EEG) assessment, infants watched video sequences in which either a human or a nonhuman target was touched/not touched by another object. Comparisons of sensorimotor alpha activation (7-9 Hz) on centro-parietal electrodes revealed differential cortical reactivity to the touch versus nontouch situations for the human versus the nonhuman target. Our findings provide preliminary evidence for the claim that infants might relate others' sensory experiences to their own sensorimotor system.
[Mh] Termos MeSH primário: Eletroencefalografia/métodos
Tato/fisiologia
[Mh] Termos MeSH secundário: Feminino
Seres Humanos
Lactente
Masculino
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:180208
[Lr] Data última revisão:
180208
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170504
[St] Status:MEDLINE
[do] DOI:10.1080/87565641.2017.1303702


  5 / 14248 MEDLINE  
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[PMID]:27775905
[Au] Autor:Leo F; Cocchi E; Brayda L
[Ti] Título:The Effect of Programmable Tactile Displays on Spatial Learning Skills in Children and Adolescents of Different Visual Disability.
[So] Source:IEEE Trans Neural Syst Rehabil Eng;25(7):861-872, 2017 07.
[Is] ISSN:1558-0210
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Vision loss has severe impacts on physical, social and emotional well-being. The education of blind children poses issues as many scholar disciplines (e.g., geometry, mathematics) are normally taught by heavily relying on vision. Touch-based assistive technologies are potential tools to provide graphical contents to blind users, improving learning possibilities and social inclusion. Raised-lines drawings are still the golden standard, but stimuli cannot be reconfigured or adapted and the blind person constantly requires assistance. Although much research concerns technological development, little work concerned the assessment of programmable tactile graphics, in educative and rehabilitative contexts. Here we designed, on programmable tactile displays, tests aimed at assessing spatial memory skills and shapes recognition abilities. Tests involved a group of blind and a group of low vision children and adolescents in a four-week longitudinal schedule. After establishing subject-specific difficulty levels, we observed a significant enhancement of performance across sessions and for both groups. Learning effects were comparable to raised paper control tests: however, our setup required minimal external assistance. Overall, our results demonstrate that programmable maps are an effective way to display graphical contents in educative/rehabilitative contexts. They can be at least as effective as traditional paper tests yet providing superior flexibility and versatility.
[Mh] Termos MeSH primário: Cegueira/fisiopatologia
Cegueira/reabilitação
Auxiliares Sensoriais
Memória Espacial
Análise e Desempenho de Tarefas
Tato
Interface Usuário-Computador
[Mh] Termos MeSH secundário: Adolescente
Criança
Feminino
Seres Humanos
Masculino
Reprodutibilidade dos Testes
Sensibilidade e Especificidade
Aprendizagem Espacial
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1710
[Cu] Atualização por classe:180201
[Lr] Data última revisão:
180201
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161025
[St] Status:MEDLINE
[do] DOI:10.1109/TNSRE.2016.2619742


  6 / 14248 MEDLINE  
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[PMID]:27773679
[Au] Autor:Herweg A; Gutzeit J; Kleih S; Kübler A
[Ad] Endereço:Institute of Psychology, University of Würzburg, Marcusstr 9-11, 97070 Würzburg, Germany.
[Ti] Título:Wheelchair control by elderly participants in a virtual environment with a brain-computer interface (BCI) and tactile stimulation.
[So] Source:Biol Psychol;121(Pt A):117-124, 2016 12.
[Is] ISSN:1873-6246
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Tactile event-related potential (ERP) are rarely used as input signal to control brain-computer-interfaces (BCI) due to their low accuracy and speed (information transfer rate, ITR). Age-related loss of tactile sensibility might further decrease their viability for the target population of BCI. In this study we investigated whether training improves tactile ERP-BCI performance within a virtual wheelchair navigation task. Elderly subjects participated in 5 sessions and tactors were placed at legs, abdomen and back. Mean accuracy and ITR increased from 88.43%/4.5bitsmin in the 1st to 92.56%/4.98bitsmin in the last session. The mean P300 amplitude increased from 5.46µV to 9.22µV. In an optional task participants achieved an accuracy of 95,56% and a mean ITR of 20,73bitsmin which is the highest ever achieved with tactile stimulation. Our sample of elderly people further contributed to the external validity of our results.
[Mh] Termos MeSH primário: Interfaces Cérebro-Computador/psicologia
Potenciais Evocados/fisiologia
Tato/fisiologia
Interface Usuário-Computador
Cadeiras de Rodas
[Mh] Termos MeSH secundário: Idoso
Meio Ambiente
Feminino
Voluntários Saudáveis
Seres Humanos
Masculino
Meia-Idade
Estimulação Física/métodos
Análise e Desempenho de Tarefas
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1709
[Cu] Atualização por classe:180125
[Lr] Data última revisão:
180125
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161107
[St] Status:MEDLINE


  7 / 14248 MEDLINE  
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[PMID]:28467817
[Au] Autor:Guo ZV; Inagaki HK; Daie K; Druckmann S; Gerfen CR; Svoboda K
[Ad] Endereço:Janelia Research Campus, HHMI, Ashburn, Virginia 20147, USA.
[Ti] Título:Maintenance of persistent activity in a frontal thalamocortical loop.
[So] Source:Nature;545(7653):181-186, 2017 05 11.
[Is] ISSN:1476-4687
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Persistent neural activity maintains information that connects past and future events. Models of persistent activity often invoke reverberations within local cortical circuits, but long-range circuits could also contribute. Neurons in the mouse anterior lateral motor cortex (ALM) have been shown to have selective persistent activity that instructs future actions. The ALM is connected bidirectionally with parts of the thalamus, including the ventral medial and ventral anterior-lateral nuclei. We recorded spikes from the ALM and thalamus during tactile discrimination with a delayed directional response. Here we show that, similar to ALM neurons, thalamic neurons exhibited selective persistent delay activity that predicted movement direction. Unilateral photoinhibition of delay activity in the ALM or thalamus produced contralesional neglect. Photoinhibition of the thalamus caused a short-latency and near-complete collapse of ALM activity. Similarly, photoinhibition of the ALM diminished thalamic activity. Our results show that the thalamus is a circuit hub in motor preparation and suggest that persistent activity requires reciprocal excitation across multiple brain areas.
[Mh] Termos MeSH primário: Córtex Motor/fisiologia
Tálamo/fisiologia
[Mh] Termos MeSH secundário: Animais
Feminino
Masculino
Camundongos
Córtex Motor/citologia
Movimento/fisiologia
Neurônios/fisiologia
Tálamo/citologia
Tato/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1708
[Cu] Atualização por classe:180111
[Lr] Data última revisão:
180111
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170504
[St] Status:MEDLINE
[do] DOI:10.1038/nature22324


  8 / 14248 MEDLINE  
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[PMID]:29228023
[Au] Autor:Schubert JTW; Badde S; Röder B; Heed T
[Ad] Endereço:Biological Psychology and Neuropsychology, Faculty of Psychology and Human Movement Science, University of Hamburg, Hamburg, Germany.
[Ti] Título:Task demands affect spatial reference frame weighting during tactile localization in sighted and congenitally blind adults.
[So] Source:PLoS One;12(12):e0189067, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Task demands modulate tactile localization in sighted humans, presumably through weight adjustments in the spatial integration of anatomical, skin-based, and external, posture-based information. In contrast, previous studies have suggested that congenitally blind humans, by default, refrain from automatic spatial integration and localize touch using only skin-based information. Here, sighted and congenitally blind participants localized tactile targets on the palm or back of one hand, while ignoring simultaneous tactile distractors at congruent or incongruent locations on the other hand. We probed the interplay of anatomical and external location codes for spatial congruency effects by varying hand posture: the palms either both faced down, or one faced down and one up. In the latter posture, externally congruent target and distractor locations were anatomically incongruent and vice versa. Target locations had to be reported either anatomically ("palm" or "back" of the hand), or externally ("up" or "down" in space). Under anatomical instructions, performance was more accurate for anatomically congruent than incongruent target-distractor pairs. In contrast, under external instructions, performance was more accurate for externally congruent than incongruent pairs. These modulations were evident in sighted and blind individuals. Notably, distractor effects were overall far smaller in blind than in sighted participants, despite comparable target-distractor identification performance. Thus, the absence of developmental vision seems to be associated with an increased ability to focus tactile attention towards a non-spatially defined target. Nevertheless, that blind individuals exhibited effects of hand posture and task instructions in their congruency effects suggests that, like the sighted, they automatically integrate anatomical and external information during tactile localization. Moreover, spatial integration in tactile processing is, thus, flexibly adapted by top-down information-here, task instruction-even in the absence of developmental vision.
[Mh] Termos MeSH primário: Cegueira/fisiopatologia
Análise e Desempenho de Tarefas
Tato
[Mh] Termos MeSH secundário: Adulto
Cegueira/congênito
Feminino
Seres Humanos
Masculino
Meia-Idade
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180104
[Lr] Data última revisão:
180104
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171212
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189067


  9 / 14248 MEDLINE  
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[PMID]:29220415
[Au] Autor:Pham TQ; Hoshi T; Tanaka Y; Sano A
[Ad] Endereço:Department of Engineering Physics, Electronics and Mechanics, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya, Japan.
[Ti] Título:Effect of 3D microstructure of dermal papillae on SED concentration at a mechanoreceptor location.
[So] Source:PLoS One;12(12):e0189293, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The feeling of touch is an essential human sensation. Four types of mechanoreceptors (i.e., FA-I, SA-I, FA-II, and SA-II) in human skin signalize physical properties, such as shape, size, and texture, of an object that is touched and transmit the signal to the brain. Previous studies attempted to investigate the mechanical properties of skin microstructure and their effect on mechanoreceptors by using finite element modeling. However, very few studies have focused on the three-dimensional microstructure of dermal papillae, and this is related to that of FA-I receptors. A gap exists between conventional 2D models of dermal papillae and the natural configuration, which corresponds to a complex and uneven structure with depth. In this study, the three-dimensional microstructure of dermal papillae is modeled, and the differences between two-dimensional and three-dimensional aspects of dermal papillae on the strain energy density at receptor positions are examined. The three-dimensional microstructure has a focalizing effect and a localizing effect. Results also reveal the potential usefulness of these effects for tactile sensor design, and this may improve edge discrimination.
[Mh] Termos MeSH primário: Mecanorreceptores/metabolismo
Pele/metabolismo
Tato
[Mh] Termos MeSH secundário: Calibragem
Análise de Elementos Finitos
Seres Humanos
Modelos Biológicos
Pele/ultraestrutura
Viscosidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; VALIDATION STUDIES
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180104
[Lr] Data última revisão:
180104
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171209
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189293


  10 / 14248 MEDLINE  
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[PMID]:29246187
[Au] Autor:Iwamoto Y; Takahashi M; Shinkoda K
[Ad] Endereço:Graduate School of Biomedical & Health Sciences, Hiroshima University, 2-3 Kasumi 1-chome, Minami-ku, Hiroshima, 734-8553, Japan.
[Ti] Título:Muscle co-contraction in elderly people change due to postural stability during single-leg standing.
[So] Source:J Physiol Anthropol;36(1):43, 2017 Dec 16.
[Is] ISSN:1880-6805
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Muscle co-contraction is the simultaneous contraction of agonist and antagonist muscles crossing a joint, and it increases with age. This study primarily aimed to clarify the difference in the effect of a light fingertip contact to stationary surface on postural sway and muscle co-contraction during single-leg standing (SLS) between young and elderly groups; the secondary aim was to reveal the quantitative difference in the muscle co-contraction of the ankle joint among the three different support structure conditions in the elderly group. METHODS: This study included eight young adults (age 23.4 ± 2.6 years) and nine community dwelling older adults (age 74.7 ± 3.4 years). The task was SLS under the following conditions: (1) no supporting structure, FR; (2) light index fingertip contact to a stationary supporting structure (to touch in force < 1 N), LT; and (3) dependence on a supporting structure for stabilization as desired, DO. Center of pressure (COP) variables [root-mean-square distance (RDIST), total excursion (TOTEX), mean velocity (MVELO), and standard deviation area (AREA-SD)] and the co-contraction index (CI) between the tibialis anterior and soleus were measured using surface electromyography. RESULTS: With regard to the effect of the light fingertip contact to stationary surface, in the young group, TOTEX, MVELO, AREA-SD, and CI during SLS were smaller under the LT condition than under the FR condition. However, in the elderly group, only AREA-SD and CI were smaller under the LT condition than under the FR condition. No significant difference was observed in COP variables and CI under the DO condition between the young and elderly groups. CONCLUSION: Both young and elderly groups could decrease muscle co-contraction using the light fingertip contact. On the other hand, in the elderly group, COP variables showed a limited effect from the light fingertip contact; only the "sway" domain measure (AREA-SD). Both young and elderly groups showed the smallest CI under the DO condition. Therefore, the elderly group could decrease muscle co-contraction of the ankle joint depending on postural stability.
[Mh] Termos MeSH primário: Contração Muscular/fisiologia
Músculo Esquelético/fisiologia
Equilíbrio Postural/fisiologia
Postura/fisiologia
[Mh] Termos MeSH secundário: Adulto
Idoso
Eletromiografia
Feminino
Dedos/fisiologia
Seres Humanos
Extremidade Inferior/fisiologia
Masculino
Análise e Desempenho de Tarefas
Tato/fisiologia
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180101
[Lr] Data última revisão:
180101
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171217
[St] Status:MEDLINE
[do] DOI:10.1186/s40101-017-0159-1



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