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Identifying a Framework for Hope in Order to Establish the Importance of Generalised Hopes for Individuals Who Have Suffered a Stroke.

ABSTRACT: Hope and hopelessness are important psychological constructs that physiotherapists should consider when working with patients who have experienced a stroke. The view of hope in rehabilitation is often focused around the concept of goals and how hope works within this framework. However, the current paper proposes a broader framework for hope and the importance of a more generalised view of understanding why a certain hope exists or is identified by a patient. A narrative review using an a priori thematic analysis was undertaken to consider how more generalised hopes are expressed by individuals who have suffered a stroke. An electronic search of 4 databases from inception until April 2014 was undertaken. Qualitative articles were included if they considered the concept of hope for patients who had suffered a stroke. The results identified three themes which included (1) consideration of the patient's identity/identities, (2) meaningful activities, experiences, and interactions, and (3) the experience of suffering and need for relief. An awareness of patients' generalised hopes should be a priority for HCPs. Detailed implications for HCPs are identified within the discussion.

SUBMITTER: Soundy A

PROVIDER: S-EPMC4590961 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:During the development of the topographic map from vertebrate retina to superior colliculus (SC), EphA receptors are expressed in a gradient along the nasotemporal retinal axis. Their ligands, ephrin-As, are expressed in a gradient along the rostrocaudal axis of the SC. Countergradients of ephrin-As in the retina and EphAs in the SC are also expressed. Disruption of any of these gradients leads to mapping errors. Gierer's (1981) model, which uses well-matched pairs of gradients and countergradients to establish the mapping, can account for the formation of wild type maps, but not the double maps found in EphA knock-in experiments. I show that these maps can be explained by models, such as Gierer's (1983), which have gradients and no countergradients, together with a powerful compensatory mechanism that helps to distribute connections evenly over the target region. However, this type of model cannot explain mapping errors found when the countergradients are knocked out partially. I examine the relative importance of countergradients as against compensatory mechanisms by generalising Gierer's (1983) model so that the strength of compensation is adjustable. Either matching gradients and countergradients alone or poorly matching gradients and countergradients together with a strong compensatory mechanism are sufficient to establish an ordered mapping. With a weaker compensatory mechanism, gradients without countergradients lead to a poorer map, but the addition of countergradients improves the mapping. This model produces the double maps in simulated EphA knock-in experiments and a map consistent with the Math5 knock-out phenotype. Simulations of a set of phenotypes from the literature substantiate the finding that countergradients and compensation can be traded off against each other to give similar maps. I conclude that a successful model of retinotopy should contain countergradients and some form of compensation mechanism, but not in the strong form put forward by Gierer.

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Identifying a Framework for Hope in Order to Establish the Importance of Generalised Hopes for Individuals Who Have Suffered a Stroke.

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