Avian cerebellar floccular fossa size is not a proxy for flying ability in birds

Extinct animal behavior has often been inferred from qualitative assessments of relative brain region size in fossil endocranial casts. For instance, flight capability in pterosaurs and early birds has been inferred from the relative size of the cerebellar flocculus, which in life protrudes from the lateral surface of the cerebellum. A primary role of the flocculus is to integrate sensory information about head rotation and translation to stabilize visual gaze via the vestibulo-occular reflex (VOR). Because gaze stabilization is a critical aspect of flight, some authors have suggested that the flocculus is enlarged in flying species. Whether this can be further extended to a floccular expansion in highly maneuverable flying species or floccular reduction in flightless species is unknown. Here, we used micro computed-tomography to reconstruct “virtual” endocranial casts of 60 extant bird species, to extract the same level of anatomical information offered by fossils. Volumes of the floccular fossa and entire brain cavity were measured and these values correlated with four indices of flying behavior. Although a weak positive relationship was found between floccular fossa size and brachial index, no significant relationship was found between floccular fossa size and any other flight mode classification. These findings could be the result of the bony endocranium inaccurately reflecting the size of the neural flocculus, but might also reflect the importance of the flocculus for all modes of locomotion in birds. We therefore conclude that the relative size of the flocculus of endocranial casts is an unreliable predictor of locomotor behavior in extinct birds, and probably also pterosaurs and non-avian dinosaurs

The sustainability of knowledge brokerage of the mental health improvement outcomes framework in Scotland:a follow-up analysis

This is a follow-up study to Reid et al (2017) which considered the barriers and facilitators of getting knowledge into policy when using a knowledge brokering approach. The previous study analysed the use of strategies to reduce barriers to the use of evidence in mental health strategy planning in Scotland using outcome frameworks. The main facilitators highlighted were the importance of local champions, cooperation within partnership networks, and national-level support. The barriers were local implementation cultures, local time pressures, perceived complexities of the framework, and timeliness of the framework. The present article details the results of a follow-up qualitative evaluation of the sustainability of the mental health improvement outcomes framework with local planners. There is a dearth of literature which focuses on the sustainability of outcome frameworks and the findings of this study suggest that the barriers highlighted by Reid et al (2017) remain acute issues. However, there are further aspects for learning for knowledge brokers themselves in terms of national and local relations and the wider challenges and opportunities relating to network governance and policy reform agendas.</jats:p