Contextual control of appetite. Renewal of inhibited food-seeking behavior in sated rats after extinction

Obesity and overeating have become fundamental problems in modern society. This article studies the inhibition of food-seeking behavior, and how contextual cues can control it. Rats that had free food in the home cage nevertheless learned to lever press for sucrose or high-fat pellets in a distinctive context (a Skinner box). Lever pressing was then inhibited by extinction, in which lever presses no longer produced food. After extinction, inhibited responding was "renewed" when the rats were switched to a different context: in the new context, the rats lever-pressed again, and worked more for food when food was made available. These effects were observed when conditioning, extinction and testing occurred in contexts A, B, and A (respectively) or in A, A, and B. Thus, mere removal from the context in which food-seeking was inhibited initiated a return to food-seeking. The contextual control of extinction may help explain why food seeking and consumption seem so persistent.     

Interstitial lung disease

The interstitial lung diseases are comprised of a group of pulmonary disorders characterized clinically by diffuse infiltrates on the chest radiograph and histologically by distortion of the gas exchanging portion of the lung. The physiologic correlates are restriction of lung volumes and impaired oxygenation. The term "interstitial" when applied to these diseases is actually a misnomer because it implies that the inflammatory process is limited specifically to the area between the alveolar epithelial and capillary endothelial basement membranes. The diseases currently grouped as "interstitial" also frequently involve the alveolar epithelium, alveolar space, pulmonary microvasculature, and less commonly, the respiratory bronchioles, larger airways, and even the pleura. The enormous differential diagnosis of interstitial lung disease can be made manageable by understanding that pneumoconiosis, drug-induced disease, and hypersensitivity pneumonitis account for over 80% of the responsible entities and can usually be identified from the patient's history. The nine remaining diseases/disease categories include: sarcoidosis, idiopathic pulmonary fibrosis, bronchiolitis obliterans-organizing pneumonia, histiocytosis X, chronic eosinophilic pneumonia, collagen vascular disease-associated interstitial lung disease, granulomatous vasculitis (Wegener's granulomatosis, Churg-Strauss syndrome, lymphomatoid granulomatosis), Goodpasture's syndrome, and pulmonary alveolar proteinosis. The diagnosis of a specific interstitial lung disease can be made via various means including the patient's history, specific serologies, bronchoalveolar lavage, transbronchial biopsy, and biopsy of extrathoracic tissues or open lung biopsy. A directed diagnostic approach can be formulated based on an understanding of these techniques and a thorough knowledge of the clinical presentations and specific diagnostic criteria for each of the major diseases. This monograph will serve as a guide for the clinician to use in evaluating and treating patients with interstitial lung disease. We begin by reviewing the clinical presentation, diagnostic criteria, and management of specific interstitial lung diseases excluding pulmonary infection, neoplasm, and sarcoidosis. Pneumoconiosis and drug-induced syndromes are not discussed in detail, but the agents responsible and pertinent exposures are presented in tabular form in the discussion of the general diagnostic approach.     

A Multi-Method Assessment of Satisfaction with Services in the Medical Home by Parents of Children and Youth with Special Health Care Needs (CYSHCN)

OBJECTIVE: To assess satisfaction of parents of children with special health care needs with treatment by office staff, communication with the pediatrician, involvement in decision-making and coordination of services outside the practice. PATIENTS AND METHODS: We used a mixed-method (qualitative and quantitative) approach to collect parental perceptions of the Medical Home services provided by their pediatricians. Six practices were selected to participate in the study based on geographic and patient demographic characteristics. In total, 262 (75% response rate) families completed surveys, and 28 families of these participated in focus groups. The Family Survey collected information (corroborated and enriched with focus group interviews) on parent and child demographics, severity of the child's condition and the burden on parents. We assessed parental satisfaction with treatment by office staff, communication with the pediatrician, involvement in decision-making, and connection to services outside the practice. Survey responses were analyzed using SAS with all associations considered significant at the P < 0.05 level. Focus groups were recorded, transcribed into EZ-Text and analyzed by a team of three researchers to identify patterns and themes inherent in the data. RESULTS: Families reported in focus group interviews that they experienced significant stress due to the demands of caring for a child with special health care needs. Overall, only a small percentage of families reported being dissatisfied with their treatment by office staff (13-14%), communication with the pediatrician (10%), and involvement in decision-making (15-16%). However, a majority of families (approximately 58%) were dissatisfied with the ability of the pediatrician and his/her office to connect the families with resources outside the pediatric office. Families whose children had more severe conditions, or whose conditions had more of an impact on the families, reported being less satisfied with all aspects of communication and care coordination Families of youth with special health care needs (>12 years of age) were less satisfied than families of younger children with the practice's ability to connect them to resources outside the practice. CONCLUSIONS: Both the focus groups and surveys demonstrated that families of children with special needs are under very significant stress. Pediatricians must become better equipped to identify and communicate more proactively with families of CYSHCN that are experiencing significant parent burden. Pediatricians and their staff also need to improve their knowledge of community resources and proactively make referrals to community services needed by families of CYSHCN.     

A community-centered model of the academic health department and implications for assessment.

The academic health department, also referred to as the teaching health department, is receiving increased attention as an organizational structure to enhance public health workforce development. Traditionally, academic institutions have been viewed by major funders, and reported in the literature, to be the innovators of these partnerships, in part to extend the academic institution's education role in the workplace. However, the role of the local health department as innovator is emerging with implications beyond workforce development. This report illustrates how a local agency-initiated community-centered approach to an academic health department enhances the core public health function of assessment, a frequently underdeveloped function at the local level. This agency-initiated, community-centered academic health department model builds assessment capacity through a partnership that integrates academic research and public health surveillance capacity to provide comprehensive assessment, including community assessment, community-based participatory research, data analysis, and program evaluation. This organizational structure, focused on systems approaches to building community capacity rather than focusing on disease categories or high-risk populations, illustrates how a local health department can substantially enhance its assessment capacity using available resources.     

Diffuse interstitial pneumonitis: Clinicopathologic correlations in 20 patients treated with prednisone/azathioprine

Twenty patients with diffuse interstitial pulmonary disease diagnosed by open lung biopsy received combined prednisone/azathioprine therapy. Twelve patients demonstrated improvement with therapy. Each patient's clinical presentation, roentgehologic features and pathologic findings were correlated with their therapeutic response. Patients with an illness of one year's duration or less had a more favorable response to therapy than patients with a greater than two year duration of illness. Patients with associated extrathoracic abnormalities (anemia, glomerulitis, hepatopathy) exhibited a better therapeutic response than those with only pulmonary disease. The biopsy material from each patient was quantitatively graded on 20 morphologic variables. Statistical analysis using multiple linear regression revealed that a single variable, degree of interstitial fibrosis, was more than 90 per cent accurate in separating those responsive to therapy from those who failed to respond. Patients who respond to treatment had less interstitial fibrosis. Neither the amount of alveolar septal inflammation nor intra-alveolar cellular reaction was discriminatory in predicting response to therapy. A beneficial response to therapy was reflected in both improved lung volumes and gas exchange. Eight patients appeared to have a selective beneficial effect from azathioprine.