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1.
Anim Welf ; 33: e11, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38510424

RESUMO

Homeless persons with dogs are often the subject of stigma, with the public criticising them for not having a proper lifestyle to care for a pet. There is solid documentation of how dogs enhance a homeless person's life, but there are few publications that address the welfare of the dog. This descriptive study assesses the physical and behavioural health of dogs belonging to homeless persons through a One Welfare lens by observing animal/human well-being, environment, and "a life worth living". A survey was carried out along with a visual assessment of the condition of the dog for 100 human-dog dyads in the Western United States. Results showed that dogs of homeless persons were well cared for and physically healthy (which was consistent with other studies), and had few behavioural problems, but did display evidence of separation distress while the owner was away. Results from this study can provide information that may lead to policy and practice changes, including, for example, changes to policies and practices prohibiting dogs from being kept with their owner while staying at a homeless shelter. Typically, shelters report that they do not have the resources to care for a person with a dog.

2.
J Sport Rehabil ; 32(4): 467-473, 2023 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-37044380

RESUMO

CONTEXT: Impact magnitude, such as peak tibial acceleration, may be associated with lower extremity injury risk and can be measured with an inertial sensor. An understanding of impact magnitude across functional tasks could guide clinicians in exercise prescription during rehabilitation of lower extremity injuries. OBJECTIVES: To determine (1) differences in impact magnitude based on task and (2) which tasks have asymmetrical impact magnitude based on limb dominance. DESIGN: Observational cohort design. Thirty-three healthy, recreationally active adult females participated in 1 testing session on a basketball court. METHODS: Participants wore inertial sensors with embedded accelerometers on bilateral distal shanks. Participants completed 9 plyometric, speed, and agility tasks commonly utilized during the return to sport phase of lower extremity rehabilitation. MAIN OUTCOME MEASURES: Average impact magnitude (peak tibial acceleration in multiples of gravity, g) for each limb for each task. ANALYSES: We used a repeated-measures analysis of variance (factor: task) to determine the differences in impact magnitude based on task. We categorized tasks by magnitude of impact into low, medium, high, and very high impact. We utilized paired t tests for each task to compare limbs (dominant vs nondominant). RESULTS: Impact magnitude differed based on task (P < .001). We classified tasks as low impact (≤10g; single-leg [SL] lateral jump, double-leg [DL] lateral jump); medium impact (11-20g; SL vertical jump, box drill); high impact (21-30g; modified T test, DL forward jump, SL forward jump); and very high impact (≥31g; sprint, DL tuck jump). Impact magnitude differed by limb in 3 tasks (DL forward jump, DL lateral jump, and box drill), with a higher impact on the dominant limb in each task. CONCLUSIONS: Impact magnitude differed based on task. While most tasks had symmetric impact magnitude between limbs, 3 tasks had a higher impact magnitude on the dominant limb.


Assuntos
Articulação do Joelho , Esportes , Adulto , Humanos , Feminino , Volta ao Esporte , Atletas , Extremidade Inferior , Fenômenos Biomecânicos
3.
eNeuro ; 9(4)2022.
Artigo em Inglês | MEDLINE | ID: mdl-35641228

RESUMO

Postingestive signals are important for shaping appetitive and consummatory responses, but the brain mechanisms required to assimilate interoceptive events with those at the frontlines of ingestion (taste-guided) are poorly understood. Here, we investigated whether an insular cortex (IC) region, which receives viscerosensory input, including gustatory, is required to modify taste-elicited consummatory reactions in response to a real-time interoceptive change using a serial taste reactivity (TR) test where the rats' oromotor and somatic reactions to intraoral (IO) infusions of sucrose were periodically assessed over 45 min following lithium chloride (LiCl) administration. Results showed that neurally-intact rats shifted from an ingestive repertoire to an aversive one as LiCl took effect. Overall, this hedonic shift was delayed in rats with bilateral neurotoxic IC lesions. Rats with greater neuronal loss in posterior gustatory IC displayed fewer aversive reactions to sucrose following this initial LiCl injection. We further assessed whether the failure to integrate interoceptive feedback with ongoing taste-guided behavior impaired acquisition and/or expression of conditioned aversion and/or avoidance in these same rats. Although, as a group, LiCl-injected rats with IC lesions subsequently avoided the sugar in a 48-h two-bottle test, their preference for sucrose was significantly greater than that of the LiCl-injected neurally-intact rats. Overall lesion size, as well as proportion of the posterior gustatory and/or anterior visceral IC were each associated with impaired avoidance. These findings reveal new roles for the posterior gustatory and anterior visceral ICs in multisensory integrative function.


Assuntos
Aprendizagem da Esquiva , Paladar , Animais , Aprendizagem da Esquiva/fisiologia , Córtex Cerebral/fisiologia , Condicionamento Clássico/fisiologia , Córtex Insular , Cloreto de Lítio/farmacologia , Ratos , Sacarose , Paladar/fisiologia
4.
J Wound Care ; 29(Sup2c): S28-S34, 2020 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-32058840

RESUMO

Maggot debridement therapy is the real-time placement of maggots into a wound by health professionals for the treatment of diabetic ulcers or hard-to-heal wounds infected with antibiotic-resistant bacteria. Maggot debridement therapy shortens healing and disinfects wounds. This paper is a literature review of maggot debridement therapy in the clinical setting today and addresses the costs and benefits of this therapy. It includes recommendations to engage healthcare providers and increase awareness of this therapeutic treatment. A case study is presented on the use of maggot therapy for full debridement of a necrotic wound and clearing of a meticillin-resistant Staphylococcus aureus infection. There is also discussion on how to engage healthcare workers and reduce anxieties about the use of maggots as a treatment for hard-to-heal wounds. Education and awareness are the key factors in changing healthcare workers attitudes to maggot debridement therapy.


Assuntos
Atitude do Pessoal de Saúde , Terapia Biológica/métodos , Desbridamento/métodos , Pé Diabético/terapia , Larva , Enfermeiras e Enfermeiros , Infecções Estafilocócicas/terapia , Infecção dos Ferimentos/terapia , Idoso , Animais , Calliphoridae , Análise Custo-Benefício , Educação em Enfermagem , Humanos , Masculino , Staphylococcus aureus Resistente à Meticilina
5.
J Psychosoc Nurs Ment Health Serv ; 57(11): 28-36, 2019 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-31305950

RESUMO

Research on caring in nurse-to-nurse relationships is not extensive, but studies have shown that health care workers can experience incivility in the workplace and unhealthy relationships can increase stress and influence nurse retention. The current study examined nurse perceptions of caring in the workplace and the effect of a mindfulness activity. A mixed method design was used, and data were collected on 164 nursing staff members after a 1-minute mindfulness activity. Pre- and post-survey growth in caring behavior indicated a statistically significant positive effect for the treatment group. Qualitative reports showed that after completing a mindfulness activity, staff members were more focused, and willing to set a good example, off er help to others, and encourage a positive overall work environment. Mindfulness activities can improve nurse-to-nurse caring and reduce incivility in the workplace. [Journal of Psychosocial Nursing and Mental Health Services, 57(11), 28-36.].


Assuntos
Empatia , Relações Interprofissionais , Atenção Plena , Recursos Humanos de Enfermagem Hospitalar/psicologia , Local de Trabalho/psicologia , Atitude do Pessoal de Saúde , Humanos , Pesquisa Qualitativa , Inquéritos e Questionários
6.
J Vaccines Vaccin ; 8(3)2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28845336

RESUMO

The human papillomavirus (HPV) is a major public health concern affecting both females and males. HPV is associated with cervical, anal, head and neck cancers. About 99% of all cervical cancers are related to HPV. HPV vaccines, Gardasil, Cervarix, and Gardasil 9 are used in the primary prevention of HPV related cancers. Gardasil and Gardasil 9 are available for use in both females and males ages 9 to 26, while Cervarix is available for females ages 9 to 25. Gardasil 9 was approved by the FDA for prevention against additional HPV types. Despite the availability of this preventative measure against cervical cancer, the rate of HPV vaccination in the United States remains lower than that of other industrialized nations. The purpose of this study is to elucidate mechanisms to help increase the HPV vaccination rate by using education as a tool; by simplifying the president report so that lay person can understand the information presented in the report. Through the quantitative examination of the data from the states with the lowest and highest vaccination rates, using SPSS statistical analysis; we analyzed several factors involved with the low uptake of the vaccines. The results collected show that socioeconomic status, misconceptions about HPV, and misconceptions about the safety of the vaccines were identified as possible obstacles to the effective uptake of HPV vaccinations. The proposals made by the President's Cancer Panel to accelerate the uptake of vaccines include, increasing coverage of the vaccines through government-sponsored programs, and the Affordable Care Act; increasing accessibility to vaccines through pharmacies, schools, and clinics; and disseminating more information on HPV to healthcare providers, parents, caregivers, and patients. Allowing greater accessibility to the vaccines for all populations regardless of income, education, and eliminating misconceptions of the vaccines would play a significant role in eliminating cancer.

7.
J Psychosoc Nurs Ment Health Serv ; 55(3): 46-52, 2017 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-28287675

RESUMO

Psychiatric nurses are expert care providers for individuals with mental health needs. The art of caring spans across multiple species, is important to understand, and is universal whether intentions are toward individuals or animals. Pets are often cared for and viewed as family members. The current research examined psychiatric nurses' views on the similarities and differences of caring for patients and their pet dogs. Twenty-five nurses were interviewed. Similarities of caring for patients and canines included trusting relationships, companionship, daily basic needs, and improved communication through monitored body language. Differences in caring included personal expectations, unconditional love, and professional boundaries. Understanding the concepts of caring for patients and pet dogs will provide the opportunity for insight into familial versus professional relationships, improve communication with others, and strengthen the human-animal bond. [Journal of Psychosocial Nursing and Mental Health Services, 55(3), 46-52.].


Assuntos
Cinésica , Relações Enfermeiro-Paciente , Cuidados de Enfermagem/psicologia , Enfermagem Psiquiátrica , Confiança , Adulto , Animais , Comunicação , Cães , Feminino , Humanos , Pessoa de Meia-Idade
8.
Nurs Ethics ; 24(4): 452-461, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26643483

RESUMO

The authors examine the nursing practice of disposing unaltered controlled substances into public water systems as an issue for nurses concerned with the environmental harm it can cause. A summary of the history of controlled substance management reveals inconsistencies in the interpretation of current regulations that have led to disposal policies that vary by institution, according to a benchmarking survey of regional hospitals. Much attention has been given to the phenomenon of conscientious objection in the context of patient care that conflicts with a nurse's moral integrity. Nurses who are compelled to dispose narcotics down drains may also face this struggle. The authors submit that this disposal method is based on a type of double effect logic where preventing diversion is viewed as a good effect of flushing unused controlled substances that outweighs any harm it may cause, though there is little evidence to support this conclusion. Consequently, the topic deserves further study so that nurse managers and administrators can support and offer alternatives to nurses who object to flushing drugs down the drain.


Assuntos
Atitude do Pessoal de Saúde , Substâncias Controladas/provisão & distribuição , Eliminação de Resíduos de Serviços de Saúde/normas , Enfermeiras e Enfermeiros/psicologia , Poluição da Água/ética , Humanos , Eliminação de Resíduos de Serviços de Saúde/métodos , Inquéritos e Questionários , Estados Unidos
9.
Chest ; 150(6): 1333-1340, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27445092

RESUMO

BACKGROUND: World Trade Center (WTC)-exposed rescue/recovery workers endured massive respiratory insult from inhalation of particulate matter and gases, resulting in respiratory symptoms, loss of lung function, and, for many, bronchial hyperreactivity (BHR). The persistence of respiratory symptoms and lung function abnormalities has been well-documented, whereas persistence of BHR has not been investigated. METHODS: A total of 173 WTC-exposed firefighters with bronchial reactivity measured within 2 years after September 11, 2001 (9/11) (baseline methacholine challenge test), were reevaluated in 2013 and 2014 (follow-up methacholine challenge test). FEV1 measurements were obtained from the late pre-9/11, early post-9/11, and late post-9/11 periods. Respiratory symptoms and corticosteroid treatment were recorded. RESULTS: Bronchial reactivity remained stable (within 1 doubling dilution) for most (n = 101, 58%). Sixteen of 28 (57%) with BHR (provocative concentration of methacholine producing a 20% decline in FEV1 <8 mg/mL) at baseline had BHR at follow-up, and an additional 27 of the 145 (19%) without BHR at baseline had BHR at follow-up. In multivariable models, we found that BHR baseline was strongly associated with BHR follow-up (OR, 6.46) and that BHR at follow-up was associated with an estimated 15.4 mL/y greater FEV1 decline than experienced by those without BHR at follow-up. Annual FEV1 decline was moderated by corticosteroid use. CONCLUSIONS: Persistent BHR and its deleterious influence on lung function suggest a role for airway inflammation in perpetuation of WTC-associated airway disease. In future massive occupational exposure to inorganic dust/gases, we recommend early and serial pulmonary function testing, including measurements of bronchial reactivity, when possible, and inhaled corticosteroid therapy for those with symptoms or pulmonary function tests consistent with airway disease.


Assuntos
Hiper-Reatividade Brônquica/epidemiologia , Hiper-Reatividade Brônquica/fisiopatologia , Exposição por Inalação/efeitos adversos , Doenças Profissionais/epidemiologia , Doenças Profissionais/fisiopatologia , Exposição Ocupacional/efeitos adversos , Ataques Terroristas de 11 de Setembro , Adulto , Testes de Provocação Brônquica , Feminino , Humanos , Masculino , Cloreto de Metacolina , Prevalência , Testes de Função Respiratória , Inquéritos e Questionários
10.
Brain Res ; 1599: 9-19, 2015 Mar 02.
Artigo em Inglês | MEDLINE | ID: mdl-25536305

RESUMO

Rats display stereotypical oromotor and somatic responses to small volumes of intraorally infused taste solutions. These behaviors, known as taste reactivity, are categorized by their association with ingestion or rejection and are thought to reflect the palatability of the stimulus. Because supracollicular decerebrate rats display normal taste reactivity responses, it would appear that forebrain structures are not necessary for generating them. However, because moving the plane of transection rostrally, or damaging or manipulating specific ventral forebrain sites disrupts normal taste reactivity behavior, lesions of the gustatory cortex, a region that has been suggested to be involved with palatability processing, may do the same. In the current study, rats received two injections of either ibotenic acid (N=12) or vehicle (N=8), targeting the conventionally defined gustatory cortex in each hemisphere, and were implanted with intraoral cannulae. Following recovery, their responses to intraoral infusions (0.23ml in 1min) of dH2O, sucrose (1.0M and 0.1M), and quinine hydrochloride (3mM and 0.3mM) were video recorded. Analysis of brains with sufficient bilateral lesions (N=10) revealed that, on average, approximately 94% of the gustatory cortex was destroyed. These extensive bilateral lesions had no significant effect on taste reactivity; the numbers of ingestive and aversive responses to sucrose and quinine were similar between groups. Though these findings do not rule out involvement of the gustatory cortex in palatability processing, they make evident that the region of insular cortex destroyed is not necessary for the normal expression of unconditioned affective behavioral responses to taste stimuli.


Assuntos
Córtex Cerebral/fisiologia , Comportamento de Ingestão de Líquido/fisiologia , Quinina/administração & dosagem , Sacarose/administração & dosagem , Percepção Gustatória/fisiologia , Paladar/fisiologia , Animais , Cateteres de Demora , Córtex Cerebral/lesões , Ácido Ibotênico , Ratos Sprague-Dawley , Água/administração & dosagem
11.
J Comp Neurol ; 522(11): 2498-517, 2014 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-24477770

RESUMO

Remarkably, when lingual gustatory nerves are surgically rerouted to inappropriate taste fields in the tongue, some taste functions recover. We previously demonstrated that quinine-stimulated oromotor rejection reflexes and neural activity (assessed by Fos immunoreactivity) in subregions of hindbrain gustatory nuclei were restored if the posterior tongue, which contains receptor cells that respond strongly to bitter compounds, was cross-reinnervated by the chorda tympani nerve. Such functional recovery was not seen if instead, the anterior tongue, where receptor cells are less responsive to bitter compounds, was cross-reinnervated by the glossopharyngeal nerve, even though this nerve typically responds robustly to bitter substances. Thus, recovery depended more on the taste field being reinnervated than on the nerve itself. Here, the distribution of quinine-stimulated Fos-immunoreactive neurons in two taste-associated forebrain areas was examined in these same rats. In the central nucleus of the amygdala (CeA), a rostrocaudal gradient characterized the normal quinine-stimulated Fos response, with the greatest number of labeled cells situated rostrally. Quinine-stimulated neurons were found throughout the gustatory cortex, but a "hot spot" was observed in its anterior-posterior center in subregions approximating the dysgranular/agranular layers. Fos neurons here and in the rostral CeA were highly correlated with quinine-elicited gapes. Denervation of the posterior tongue eliminated, and its reinnervation by either nerve restored, numbers of quinine-stimulated labeled cells in the rostralmost CeA and in the subregion approximating the dysgranular gustatory cortex. These results underscore the remarkable plasticity of the gustatory system and also help clarify the functional anatomy of neural circuits activated by bitter taste stimulation.


Assuntos
Núcleo Central da Amígdala/fisiologia , Córtex Cerebral/fisiologia , Nervo Lingual/fisiologia , Regeneração Nervosa/fisiologia , Plasticidade Neuronal/fisiologia , Percepção Gustatória/fisiologia , Anastomose Cirúrgica , Animais , Contagem de Células , Denervação , Água Potável/administração & dosagem , Imuno-Histoquímica , Nervo Lingual/cirurgia , Masculino , Neurônios/fisiologia , Fotomicrografia , Estimulação Física , Proteínas Proto-Oncogênicas c-fos/metabolismo , Quinina/administração & dosagem , Ratos Sprague-Dawley , Paladar/fisiologia
13.
Nurs Older People ; 24(7): 33-6, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23008918

RESUMO

Older people diagnosed with dementia can have complex needs, especially when they exhibit agitated behaviour. Patients with agitated behaviour challenge the delivery of health care. Often the behaviour is a symptom of unmet needs in this population (Dewing 2010). It is important for nurses to understand the underlying causes and apply evidence-based interventions in their nursing practice to promote health, safety and the highest quality of life possible. This article defines and classifies agitated behaviours, discusses implications for their management and then presents evidence-based interventions nurses can use. The interventions are categorised according to each of the five senses.


Assuntos
Sintomas Comportamentais/enfermagem , Demência/enfermagem , Agitação Psicomotora/enfermagem , Terapias Sensoriais através das Artes/métodos , Idoso , Humanos , Terapias Sensoriais através das Artes/enfermagem
14.
J Psychosoc Nurs Ment Health Serv ; 50(5): 42-6, 2012 May.
Artigo em Inglês | MEDLINE | ID: mdl-22533841

RESUMO

In the behavioral health environment, nurses often use continuous staff monitoring and, at times, physical restraints, to manage the severity of patients' self-injury. Both options put staff in control, are the most restrictive in nature, and can be financially draining on the hospital's budget. This can result in negative reactions by both patients and staff. It is important to develop a program that will empower patients to control their behavior and allow staff to be aware of their perceptions and attitudes toward patients who self-injure. This article describes the leadership initiative that drove the development, training, and implementation of a self-injury prevention project and the lessons learned by staff.


Assuntos
Relações Enfermeiro-Paciente , Comportamento Autodestrutivo/enfermagem , Comportamento Autodestrutivo/prevenção & controle , Atitude do Pessoal de Saúde , Currículo , Hospitais Psiquiátricos , Humanos , Comportamento Impulsivo/enfermagem , Comportamento Impulsivo/prevenção & controle , Comportamento Impulsivo/psicologia , Capacitação em Serviço , Poder Psicológico , Enfermagem Psiquiátrica/educação , Restrição Física/psicologia , Comportamento Autodestrutivo/psicologia , Apoio Social
15.
J Psychosoc Nurs Ment Health Serv ; 48(11): 44-8, 2010 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-20873700

RESUMO

The use of animal-assisted therapy (AAT) as an adjunct treatment approach in psychiatric settings has received much attention in the literature. This article explores the use of AAT with psychiatric patients. The authors performed a literature review and found that AAT can have a significant effect on the improvement of psychiatric patients' socialization and provides a variety of psychological benefits. Nurses can benefit from learning about the potential benefits of AAT for psychiatric patients.


Assuntos
Terapia Assistida com Animais , Transtornos Mentais/terapia , Adulto , Idoso , Animais , Criança , Cães , Vínculo Humano-Animal , Humanos , Socialização
16.
Am J Physiol Regul Integr Comp Physiol ; 294(3): R738-47, 2008 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-18184761

RESUMO

Studies examining the effects of transection and regeneration of the glossopharyngeal (GL) and chorda tympani (CT) nerves on various taste-elicited behaviors in rats have demonstrated that the GL (but not the CT) nerve is essential for the maintenance of both an unconditioned protective reflex (gaping) and the neural activity observed in central gustatory structures in response to lingual application of a bitter substance. An unresolved issue, however, is whether recovery depends more on the taste nerve and the central circuits that it supplies and/or on the tongue receptor cell field being innervated. To address this question, we experimentally cross-wired these taste nerves, which, remarkably, can regenerate into parts of the tongue they normally do not innervate. We report that quinine-stimulated gaping behavior was fully restored, and neuronal activity, as assessed by Fos immunohistochemistry in the nucleus of the solitary tract and the parabrachial nucleus, was partially restored only if the posterior tongue (PT) taste receptor cell field was reinnervated; the particular taste nerve supplying the input was inconsequential to the recovery of function. Thus, PT taste receptor cells appear to play a privileged role in triggering unconditioned gaping to bitter tasting stimuli, regardless of which lingual gustatory nerve innervates them. Our findings demonstrate that even when a lingual gustatory nerve (the CT) forms connections with taste cells in a non-native receptor field (the PT), unconditioned taste rejection reflexes to quinine can be maintained. These findings underscore the extraordinary ability of the gustatory system to adapt to peripherally reorganized input for particular behaviors.


Assuntos
Comportamento Animal/efeitos dos fármacos , Nervo Lingual/fisiologia , Quinina/farmacologia , Papilas Gustativas/fisiologia , Anastomose Cirúrgica , Animais , Plexo Braquial/fisiologia , Encéfalo/anatomia & histologia , Tronco Encefálico/fisiologia , Imuno-Histoquímica , Masculino , Proteínas Oncogênicas v-fos/metabolismo , Ratos , Ratos Sprague-Dawley , Núcleo Solitário/fisiologia , Comportamento Estereotipado/efeitos dos fármacos , Paladar/efeitos dos fármacos , Língua/anatomia & histologia , Língua/inervação
17.
Behav Neurosci ; 118(1): 163-72, 2004 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-14979793

RESUMO

The "waist" area and external subnuclei of the parabrachial nucleus (PBN) have been implicated in the processing of gustatory information, yet their behavioral roles are not clearly defined. In the current study, areas within and surrounding the PBN were stimulated while oromotor behaviors were monitored in conscious rats. Electrical and chemical (100 mM glutamate) stimulation of the waist area increased ingestive oromotor behaviors over baseline (p<.01). Stimulation of external PBN subnuclei and areas medial and ventral to the PBN failed to cause a behavioral change. These data support the hypothesis that the waist area of the PBN constitutes part of the neural substrate involved in eliciting oromotor behaviors in response to taste input.


Assuntos
Atividade Motora/fisiologia , Boca/fisiologia , Ponte/fisiologia , Animais , Estimulação Elétrica/métodos , Ácido Glutâmico/farmacologia , Masculino , Atividade Motora/efeitos dos fármacos , Boca/efeitos dos fármacos , Ponte/efeitos dos fármacos , Ratos , Ratos Wistar
18.
J Comp Neurol ; 465(2): 296-308, 2003 Oct 13.
Artigo em Inglês | MEDLINE | ID: mdl-12949788

RESUMO

The distribution of quinine-stimulated Fos-like immunoreactivity (FLI) in several subdivisions of the parabrachial nucleus (PBN) known to be responsive to gustatory stimulation was examined in rats in which the chorda tympani nerve (CT) and/or glossopharyngeal nerve (GL) was transected (Experiment 1) and in rats in which the GL was transected with regeneration promoted or prevented (Experiment 2). We confirmed previous findings in the literature by demonstrating that rats intraorally infused with 3 mM quinine showed a robust population of FLI in the waist area and the external lateral (EL) and external medial (EM) subdivisions of the PBN (Yamamoto et al. [1994] Physiol Behav 56:1197-1202; Travers et al., [ 1999] Am J Physiol 277:R384-R394). In the waist area, only GL transection significantly decreased the number of FLI-neurons elicited by intraoral infusion of quinine compared with water-stimulated controls. In the external subdivisions neither neurotomy affected the number of FLI-neurons. The effect of GL transection in the waist area was enduring for rats in which the GL did not regenerate (up to 94 days), but regeneration of the GL after 52 days restored quinine-stimulated FLI to control values. In these same GL-transected animals, there were parallel decreases in the number of gapes elicited by intraoral quinine stimulation that recovered, but only subsequent to regeneration of the GL. These data provide support for the role of the waist area in the brainstem processing that underlies oromotor rejection behaviors and also help substantiate the hypothesis that the CT and GL are relatively specialized with regard to function. Moreover, when the quinine-induced pattern of neural activity in the second central gustatory relay, as assessed by FLI, is substantially altered by the loss of peripheral gustatory input from the GL, it can be restored upon regeneration of the nerve.


Assuntos
Nervo da Corda do Tímpano/fisiologia , Nervo Glossofaríngeo/fisiologia , Regeneração Nervosa/fisiologia , Proteínas Oncogênicas v-fos/metabolismo , Ponte/fisiologia , Paladar/fisiologia , Animais , Axotomia , Imuno-Histoquímica , Masculino , Relaxantes Musculares Centrais/farmacologia , Proteínas Oncogênicas v-fos/efeitos dos fármacos , Quinina/farmacologia , Ratos , Ratos Sprague-Dawley , Estimulação Química , Língua/inervação , Língua/metabolismo
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