Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 44
Filtrar
Mais filtros










Intervalo de ano de publicação
1.
Aging Ment Health ; 27(10): 1990-1999, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37574858

RESUMO

OBJECTIVE: Studies of families' experiences with caregiving to older adults most often focus on overall burden and stress. Yet, caregiving is also a type of relationship, and the onset of caregiving can contribute to relationship strain between care partners. Despite implications for both care partners, little is known about how caregivers cope with caregiving relationship strain. METHODS: The authors conducted nine focus groups and 8 interviews with a purposeful sample of racially and ethnically diverse family caregivers in Los Angeles. Conventional content analysis was applied to transcripts to identify how caregivers cope with relationship strain. RESULTS: Analyses revealed four overall coping approaches to manage relationship strain: (1) Self-Care; (2) Adapting Behaviors, (3) Adapting Feelings and Cognitions, and (4) Help and Support. Selected strategies likely vary by care recipient condition. For example, caregivers for persons living with dementia emphasize adapting their own behaviors and feelings, rather than trying to change their loved one's behaviors. CONCLUSIONS: Findings suggest that caregivers cope with relationship strain using both interpersonal tension and care management strategies. We also identified possible variations by care recipient condition and caregiver race and ethnicity. These results suggest a need for interventions focused on caregiver coping should also be tested for effects on relationship strain.


Assuntos
Cuidadores , Estresse Psicológico , Humanos , Idoso , Adaptação Psicológica , Emoções , Etnicidade , Família
2.
Heliyon ; 9(3): e14368, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36950568

RESUMO

The use of ketamine/xylazine for its anesthetic, anti-inflammatory, and anti-depressant properties could alter other medications and immune functions of the body. Thus, the current study explored how ketamine/xylazine affects the severity of influenza infection in BALB/c and C57Bl/6 mice, monitored for weight loss after intranasal inoculation with A/Puerto Rico/8/34 influenza virus. Mice were inoculated by using a micropipettor to insert 18 µL of control or a suspension of virus into each nostril and allowing the mouse to inhale the material. Several experiments were performed where groups of mice were treated with various combinations of virus and anesthesia and the results compared. Mice were weighed daily and monitored for other signs of illness. The experiments continued until the mice either regained their original weight or died (were euthanized when signs indicated non-recoverable status), which ranged from nine to twenty-three days. Anesthetized mice experienced more weight loss. Additionally, in experiments where the virus suspension was potent enough to lead to death, only mice that were anesthetized died.

3.
Artigo em Inglês | MEDLINE | ID: mdl-32370093

RESUMO

Evidence shows that ageism negatively impacts the health of older adults. However, estimates of its prevalence are lacking. This study aimed to estimate the global prevalence of ageism towards older adults and to explore possible explanatory factors. Data were included from 57 countries that took part in Wave 6 of the World Values Survey. Multilevel Latent Class Analysis was performed to identify distinct classes of individuals and countries. Individuals were classified as having high, moderate or low ageist attitudes; and countries as being highly, moderately or minimally ageist, by aggregating individual responses. Individual-level (age, sex, education and wealth) and contextual-level factors (healthy life expectancy, population health status and proportion of the population aged over 60 years) were examined as potential explanatory factors in multinomial logistic regression. From the 83,034 participants included, 44%, 32% and 24% were classified as having low, moderate and high ageist attitudes, respectively. From the 57 countries, 34 were classified as moderately or highly ageist. The likelihood of an individual or a country being ageist was significantly reduced by increases in healthy life expectancy and the proportion of older people within a country. Certain personal characteristics-younger age, being male and having lower education-were significantly associated with an increased probability of an individual having high ageist attitudes. At least one in every two people included in this study had moderate or high ageist attitudes. Despite the issue's magnitude and negative health impacts, ageism remains a neglected global health issue.


Assuntos
Etarismo , Envelhecimento , Expectativa de Vida , Idoso , Idoso de 80 Anos ou mais , Atitude , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários
4.
J Health Care Chaplain ; 25(2): 61-75, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30052490

RESUMO

There is increasing pressure to provide an evidence base for chaplaincy with children and young people. This is an underresearched area, and current evidence is often anecdotal. Advocate Health Care in Chicago (funded by the Templeton Foundation working in partnership with the Health Care Chaplaincy Network) developed a 100-item taxonomy that was the starting point for a wider international initiative in developing a taxonomy for use in health care chaplaincy. The team at Birmingham Children's Hospital is part of this wider project and have sought to adapt and develop the original taxonomy for use in a specialist pediatric hospital. The Advocate structure of intended effect (why chaplains do what they do), method (what they do), and intervention (how they do it) was adapted by adding items generated from the chaplaincy team's research, writing, and experience. A total of 80 taxonomy charts were collected from 12 chaplaincy team members representing three world faiths. Quantitative data from the chart were analyzed and summarized. The findings were subsequently reviewed by the research team and a revised version of the taxonomy was produced based on the frequency of use of the additional items.


Assuntos
Serviço Religioso no Hospital , Defesa da Criança e do Adolescente , Defesa do Paciente , Serviço Religioso no Hospital/classificação , Serviço Religioso no Hospital/organização & administração , Criança , Pré-Escolar , Inglaterra , Feminino , Hospitais Pediátricos , Humanos , Lactente , Recém-Nascido , Masculino , Projetos Piloto , Religião
5.
Disabil Rehabil ; 40(6): 646-654, 2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-28110561

RESUMO

AIM: The majority of post-acute hip fracture rehabilitation in the US is delivered in skilled nursing facilities (SNFs). Currently, there are limited guidelines that equip occupational and physical therapy practitioners with a summary of what constitutes evidence-based high quality rehabilitation. Thus, this study aimed to identify rehabilitation practitioners' perspectives on the practices that constitute high quality hip fracture rehabilitation. METHODS: Focus groups were conducted with 99 occupational and physical therapy practitioners working in SNFs in southern California. Purposive sampling of facilities was conducted to capture variation in key characteristics known to impact care delivery for this patient population (e.g., financial resources, staffing, and patient case-mix). Questions aimed to elicit practitioners' perspectives on high quality hip fracture rehabilitation practices. Each session was audio-recorded and transcribed. Data were systematically analyzed using a modified grounded theory approach. RESULTS: Seven themes emerged: objectives of care; first 72 h; positioning, pain, and precautions; use of standardized assessments; episode of care practices; facilitating insight into progress; and interdisciplinary collaboration. CONCLUSIONS: Clinical guidelines are critical tools to facilitate clinical decision-making and achieve desired patient outcomes. The findings of this study highlight the practitioners' perspective on what constitutes high quality hip fracture rehabilitation. This work provides critical information to advance the development of stakeholder-driven rehabilitation clinical guidelines. Future research is needed to verify the findings from other stakeholders (e.g., patients), ensure the alignment of our findings with current evidence, and develop measures for evaluating their delivery and relationship to desired outcomes. Implications for Rehabilitation This study highlights occupational and physiotherapy therapy practitioners' perspectives on the cumulative best practices that reflect high quality care, which should be delivered during hip fracture rehabilitation. While this study was limited to two professions within the broader interdisciplinary team, consistently occupational and physiotherapy therapy practitioners situated their role and practices within the team, emphasizing that high quality care was driven by collaboration among all members of the team as well as the patient and caregivers. Future research needs to evaluate the (a) frequency at which these practices are delivered and the relationship to patient-centered outcomes, and (b) perspectives of rehabilitation practitioners working in other PAC settings, patients, caregivers, as well as the other members of the interdisciplinary PAC team.


Assuntos
Atenção à Saúde , Fraturas do Quadril/reabilitação , Terapeutas Ocupacionais/normas , Fisioterapeutas/normas , Modalidades de Fisioterapia , Melhoria de Qualidade , Instituições de Cuidados Especializados de Enfermagem/normas , Atitude do Pessoal de Saúde , California , Atenção à Saúde/organização & administração , Atenção à Saúde/normas , Feminino , Grupos Focais , Humanos , Masculino , Modalidades de Fisioterapia/organização & administração , Modalidades de Fisioterapia/normas , Resultado do Tratamento
6.
Antioxidants (Basel) ; 6(4)2017 Oct 28.
Artigo em Inglês | MEDLINE | ID: mdl-29143759

RESUMO

This overview was directed towards understanding the relationship of brain functions with dietary choices mainly by older humans. This included food color, flavor, and aroma, as they relate to dietary sufficiency or the association of antioxidants with neurodegenerative diseases such as dementia and Alzheimer's disease. Impairment of olfactory and gustatory function in relation to these diseases was also explored. The role of functional foods was considered as a potential treatment of dementia and Alzheimer's disease through inhibition of acetylcholinesterase as well as similar treatments based on herbs, spices and antioxidants therein. The importance of antioxidants for maintaining the physiological functions of liver, kidney, digestive system, and prevention of cardiovascular diseases and cancer has also been highlighted. Detailed discussion was focused on health promotion of the older person through the frequency and patterns of dietary intake, and a human ecology framework to estimate adverse risk factors for health. Finally, the role of the food industry, mass media, and apps were explored for today's new older person generation.

8.
Biomed Inform Insights ; 9: 1178222616686067, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28469429

RESUMO

Religious or spiritual struggles are clinically important to health care chaplains because they are related to poorer health outcomes, involving both mental and physical health problems. Identifying persons experiencing religious struggle poses a challenge for chaplains. One potentially underappreciated means of triaging chaplaincy effort are prayers written in chapel notebooks. We show that religious struggle can be identified in these notebooks through instances of negative religious coping, such as feeling anger or abandonment toward God. We built a data set of entries in chapel notebooks and classified them as showing religious struggle, or not. We show that natural language processing techniques can be used to automatically classify the entries with respect to whether or not they reflect religious struggle with as much accuracy as humans. The work has potential applications to triaging chapel notebook entries for further attention from pastoral care staff.

11.
BMC Public Health ; 14: 1094, 2014 Oct 22.
Artigo em Inglês | MEDLINE | ID: mdl-25335922

RESUMO

BACKGROUND: An association between depressive symptoms and features of built environment has been reported in the literature. A remaining research challenge is the development of methods to efficiently capture pertinent environmental features in relevant study settings. Visual streetscape images have been used to replace traditional physical audits and directly observe the built environment of communities. The aim of this work is to examine the inter-method reliability of the two audit methods for assessing community environments with a specific focus on physical features related to mental health. METHODS: Forty-eight postcodes in urban and rural areas of Cambridgeshire, England were randomly selected from an alphabetical list of streets hosted on a UK property website. The assessment was conducted in July and August 2012 by both physical and visual image audits based on the items in Residential Environment Assessment Tool (REAT), an observational instrument targeting the micro-scale environmental features related to mental health in UK postcodes. The assessor used the images of Google Street View and virtually "walked through" the streets to conduct the property and street level assessments. Gwet's AC1 coefficients and Bland-Altman plots were used to compare the concordance of two audits. RESULTS: The results of conducting the REAT by visual image audits generally correspond to direct observations. More variations were found in property level items regarding physical incivilities, with broad limits of agreement which importantly lead to most of the variation in the overall REAT score. Postcodes in urban areas had lower consistency between the two methods than rural areas. CONCLUSIONS: Google Street View has the potential to assess environmental features related to mental health with fair reliability and provide a less resource intense method of assessing community environments than physical audits.


Assuntos
Meio Ambiente , Saúde Mental , Variações Dependentes do Observador , Características de Residência , Interface Usuário-Computador , Coleta de Dados , Inglaterra , Planejamento Ambiental , Recursos em Saúde , Utensílios Domésticos , Humanos , Mapas como Assunto , Reprodutibilidade dos Testes , Ferramenta de Busca , Trabalho
12.
Pain ; 155(3): 467-475, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24269492

RESUMO

Human brain imaging investigations have revealed that acute pain is associated with coactivation of numerous brain regions, including the thalamus, somatosensory, insular, and cingulate cortices. Surprisingly, a similar set of brain structures is not activated in all chronic pain conditions, particularly chronic neuropathic pain, which is associated with almost exclusively decreased thalamic activity. These inconsistencies may reflect technical issues or fundamental differences in the processing of acute compared with chronic pain. The appreciation of any differences is important because better treatment development will depend on understanding the underlying mechanisms of different forms of pain. In this investigation, we used quantitative arterial spin labeling to compare and contrast regional cerebral blood flow (CBF) patterns in individuals with chronic neuropathic orofacial pain (painful trigeminal neuropathy) and chronic nonneuropathic orofacial pain (painful temporomandibular disorder). Neuropathic pain was associated with CBF decreases in a number of regions, including the thalamus and primary somatosensory and cerebellar cortices. In contrast, chronic nonneuropathic pain was associated with significant CBF increases in regions commonly associated with higher-order cognitive and emotional functions, such as the anterior cingulate and dorsolateral prefrontal cortices and the precuneus. Furthermore, in subjects with nonneuropathic pain, blood flow increased in motor-related regions as well as within the spinal trigeminal nucleus.


Assuntos
Encéfalo/metabolismo , Medição da Dor/métodos , Dor/metabolismo , Transtornos da Articulação Temporomandibular/metabolismo , Doenças do Nervo Trigêmeo/metabolismo , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Dor/diagnóstico , Transtornos da Articulação Temporomandibular/diagnóstico , Doenças do Nervo Trigêmeo/diagnóstico , Adulto Jovem
14.
Pain ; 154(6): 776-81, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23618495

RESUMO

Functional magnetic resonance imaging (fMRI) is a technique that uses blood oxygen-level-dependent (BOLD) signals to elucidate discrete areas of neuronal activity. Despite the significant number of fMRI human brain studies, few researchers have applied fMRI technology to investigating neuronal activity within the human spinal cord. Our study goals were to demonstrate that fMRI could reveal the following: (i) appropriate somatotopic activations in response to noxious stimuli in the deep and superficial dorsal horn of the human cervical spinal cord, and (ii) lateralization of fMRI activations in response to noxious stimulation in the right and left upper extremity. We subjected healthy participants to noxious stimulation during fMRI scans. Using a spiral in-out image sequence and retrospective correction for physiologic noise, we demonstrated that fMRI can create high-resolution, neuronal activation maps of the human cervical spinal cord. During nociceptive stimulation of all 4 sites (left deltoid, right deltoid, left thenar eminence and right thenar eminence), we found ipsilateral dorsal horn activation. Stimulation of the deltoid activated C5, whereas stimulation of the thenar eminence activated C6. Our study contributes to creating an objective analysis of pain transmission; other investigators can use these results to further study central nervous system changes that occur in patients with acute and chronic pain.


Assuntos
Neurônios/fisiologia , Nociceptividade/fisiologia , Dor/fisiopatologia , Medula Espinal/fisiopatologia , Adolescente , Adulto , Feminino , Neuroimagem Funcional , Humanos , Processamento de Imagem Assistida por Computador , Imageamento por Ressonância Magnética , Masculino
15.
J Wildl Dis ; 48(4): 1042-6, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23060506

RESUMO

RABORAL V-RG(®)a is a recombinant vaccine used in oral rabies vaccination (ORV) programs for wildlife in the United States. Vaccination rates for raccoons are substantially lower than vaccination rates for gray foxes and coyotes. Research suggests that the low viscosity of the oral vaccine may preclude animals from receiving an effective dose when biting into the vaccine bait delivery system. We evaluated the possibility of using two benign compounds, chitosan and N,N,N-trimethylated chitosan (TMC), to increase the viscosity of the vaccine and potentially act as adjuvants to improve the immune response in raccoons (Procyon lotor). Forty mildly sedated raccoons were orally vaccinated via needleless syringe with either RABORAL V-RG (n = 12), chitosan+RABORAL V-RG (n = 12), TMC+ RABORAL V-RG (n = 12), or no vaccine (n = 4), on day 0 and again on day 90. We collected sera every 2-4 wk for 4 mo and evaluated rabies virus-neutralizing antibodies (rVNA). Raccoons were considered responders if rVNA titers were ≥ 0.1 IU/mL. Eleven of 12 raccoons vaccinated with TMC+RABORAL V-RG responded after one dose of vaccine, as did eight of 12 vaccinated with RABORAL V-RG, and three of 12 vaccinated with chitosan+ RABORAL V-RG. Our results suggest that the inclusion of an adjuvant, such as TMC, could increase vaccine efficacy to aid in controlling rabies virus spread in wildlife reservoirs.


Assuntos
Adjuvantes Imunológicos/química , Anticorpos Antivirais/sangue , Vacina Antirrábica/administração & dosagem , Raiva/veterinária , Guaxinins , Vacinação/veterinária , Animais , Animais Selvagens , Coiotes/imunologia , Raposas/imunologia , Raiva/prevenção & controle , Vacina Antirrábica/imunologia , Guaxinins/imunologia , Guaxinins/virologia , Vacinação/métodos , Vacinas Sintéticas/administração & dosagem , Vacinas Sintéticas/imunologia , Viscosidade
16.
PLoS One ; 7(10): e45774, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-23082115

RESUMO

Avian scavengers, such as American crows (Corvus brachyrhynchos), have potential to translocate infectious agents (prions) of transmissible spongiform encephalopathy (TSE) diseases including chronic wasting disease, scrapie, and bovine spongiform encephalopathy. We inoculated mice with fecal extracts obtained from 20 American crows that were force-fed material infected with RML-strain scrapie prions. These mice all evinced severe neurological dysfunction 196-231 d postinoculation (x =198; 95% CI: 210-216) and tested positive for prion disease. Our results suggest a large proportion of crows that consume prion-positive tissue are capable of passing infectious prions in their feces (ˆp=1.0; 95% CI: 0.8-1.0). Therefore, this common, migratory North American scavenger could play a role in the geographic spread of TSE diseases.


Assuntos
Corvos/metabolismo , Sistema Digestório/metabolismo , Príons/patogenicidade , Animais , Ensaio de Imunoadsorção Enzimática , Camundongos , Camundongos Endogâmicos C57BL , Scrapie/transmissão , Análise de Sobrevida
17.
J Neurosci ; 31(16): 5956-64, 2011 Apr 20.
Artigo em Inglês | MEDLINE | ID: mdl-21508220

RESUMO

Trigeminal neuropathic pain (TNP) and temporomandibular disorders (TMD) are thought to have fundamentally different etiologies. It has been proposed that TNP arises through damage to, or pressure on, somatosensory afferents in the trigeminal nerve, whereas TMD results primarily from peripheral nociceptor activation. Because some reports suggest that neuropathic pain is associated with changes in brain anatomy, it is possible that TNP is maintained by changes in higher brain structures, whereas TMD is not. The aim of this investigation is to determine whether changes in regional brain anatomy and biochemistry occur in both conditions. Twenty-one TNP subjects, 20 TMD subjects, and 36 healthy controls were recruited. Voxel-based morphometry of T1-weighted anatomical images revealed no significant regional gray matter volume change in TMD patients. In contrast, gray matter volume of TNP patients was reduced in the primary somatosensory cortex, anterior insula, putamen, nucleus accumbens, and the thalamus, whereas gray matter volume was increased in the posterior insula. The thalamic volume decrease was only seen in the TNP patients classified as having trigeminal neuropathy but not those with trigeminal neuralgia. Furthermore, in trigeminal neuropathy patients, magnetic resonance spectroscopy revealed a significant reduction in the N-acetylaspartate/creatine ratio, a biochemical marker of neural viability, in the region of thalamic volume loss. The data suggest that the pathogenesis underlying neuropathic and non-neuropathic pain conditions are fundamentally different and that neuropathic pain conditions that result from peripheral injuries may be generated and/or maintained by structural changes in regions such as the thalamus.


Assuntos
Fibras Nervosas Amielínicas/patologia , Neuralgia/patologia , Transtornos da Articulação Temporomandibular/patologia , Tálamo/patologia , Adulto , Idoso , Mapeamento Encefálico , Doença Crônica , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Neuralgia/fisiopatologia , Tamanho do Órgão , Transtornos da Articulação Temporomandibular/fisiopatologia , Tálamo/fisiopatologia
18.
J Public Health (Oxf) ; 33(4): 587-603, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-21307049

RESUMO

BACKGROUND: The Short Form 36 Health Survey Questionnaire (SF-36) is used to indicate the health status of particular populations, to help with service planning and to measure the impact of clinical and social interventions. Culture-specific data are required to calculate SF-36 norm-based scores. Currently, in the UK normative sources are nearly two decades old, Anglocentric and lack data on the older population. We draw on raw data from the Welsh Health Survey (2007) to provide population norms for the eight SF-36 dimensions for Wales and its regions. METHODS: We test the SF-36 dimensions for reliability and rating scaling assumptions and construct validity. We compare the Wales' norms to those reported in existing UK sources and examine the data between countries and by region. RESULTS: The scale is reliable and has content validity. The relationships found between the SF-36 domains and a range of variables known to be related to health also demonstrate construct validity. There are differences in population health norms between England and Wales and between the regions of Wales. CONCLUSIONS: The results suggest that it is imperative that the accurate normative data provided in this paper is used in population studies in Wales to provide an indication of the health status of particular populations.


Assuntos
Avaliação da Deficiência , Nível de Saúde , Inquéritos Epidemiológicos , Saúde Mental , Medição da Dor , Adolescente , Adulto , Idoso , Doença Crônica , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Valores de Referência , Reprodutibilidade dos Testes , Fatores Socioeconômicos , Inquéritos e Questionários , Reino Unido , País de Gales , Adulto Jovem
19.
Proc Natl Acad Sci U S A ; 107(19): 8842-7, 2010 May 11.
Artigo em Inglês | MEDLINE | ID: mdl-20421472

RESUMO

Lipoxins (Lxs) and aspirin-triggered epi-Lxs (15-epi-LxA(4)) act through the ALX/FPRL1 receptor to block leukocyte trafficking, dampen cytokine/chemokine synthesis, and enhance phagocytic clearance of apoptotic leukocytes-key requisites for inflammatory resolution. Although studies using primarily inbred rodents have highlighted resolution as an active event, little is known about the role resolution pathways play in controlling the duration/profile of inflammatory responses in humans. To examine this, we found two types of responders to cantharidin-induced skin blisters in male healthy volunteers: those with immediate leukocyte accumulation and cytokine/chemokine synthesis followed by early resolution and a second group whose inflammation increased gradually over time followed by delayed resolution. In early resolvers, blister 15-epi-LxA(4) and leukocyte ALX were low, but increased as inflammation abated. In contrast, in delayed resolvers, 15-epi-LxA(4) and ALX were high early in the response but waned as inflammation progressed. Elevating 15-epi-LxA(4) in early resolvers using aspirin increased blister leukocyte ALX but reduced cytokines/chemokines as well as polymorphonuclear leukocyte and macrophage numbers. These findings show that two phenotypes exist in humans with respect to inflammation severity/longevity controlled by proresolution mediators, namely 15-epi-LxA(4). These data have implications for understanding the etiology of chronic inflammation and future directions in antiinflammatory therapy.


Assuntos
Inflamação/imunologia , Inflamação/patologia , Adulto , Aspirina/administração & dosagem , Aspirina/farmacologia , Humanos , Inflamação/induzido quimicamente , Lipoxinas/metabolismo , Masculino , Pessoa de Meia-Idade , Receptores de Formil Peptídeo/metabolismo , Receptores de Lipoxinas/metabolismo , Fatores de Tempo
20.
J Orofac Pain ; 24(4): 379-90, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-21197510

RESUMO

AIMS: To use functional magnetic resonance imaging (fMRI) to determine whether orofacial cutaneous or muscle pain is associated with changes in primary motor cortex (M1) activity that outlast the duration of perceived pain, and whether these M1 changes are different during cutaneous pain compared with muscle pain. METHODS: fMRI was used in healthy subjects experiencing orofacial muscle (n = 17) or cutaneous (n = 15) pain induced by bolus injections of hypertonic saline (4.5%) into the belly of the masseter muscle (0.5 ml) or subcutaneously (0.2 ml) into the overlying skin, respectively. To determine the effects of the injection volume, isotonic saline (n = 4) was injected into the masseter muscle. RESULTS: Similar pain scores were observed following subcutaneous (mean [± SEM]; 4.73 ± 0.51) or intramuscular injections (4.35 ± 0.56). Orofacial muscle but not cutaneous pain was associated with a transient increase in signal intensity in the contralateral M1. Cutaneous and muscle orofacial pains were associated with similar signal intensity decreases within the contralateral M1 that continued to decrease for the entire scanning period. Isotonic saline did not evoke pain or changes in M1 signal intensity. CONCLUSION: The transient contralateral M1 signal intensity increase during orofacial muscle pain may underlie escape-like motor patterns. However, once the initial threat has subsided, longer-term reductions in M1 activity and/or excitability may occur to aid in minimizing movement of the affected part, an effect consistent with the general proposals of the Pain Adaptation Model.


Assuntos
Dor Facial/fisiopatologia , Músculo Masseter/fisiopatologia , Córtex Motor/fisiologia , Percepção da Dor/fisiologia , Pele/fisiopatologia , Adaptação Fisiológica , Adulto , Reação de Fuga , Dor Facial/induzido quimicamente , Feminino , Humanos , Injeções Intramusculares , Injeções Subcutâneas , Imageamento por Ressonância Magnética/métodos , Masculino , Músculo Masseter/efeitos dos fármacos , Pessoa de Meia-Idade , Solução Salina Hipertônica/administração & dosagem , Pele/efeitos dos fármacos , Estimulação Química , Adulto Jovem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...