Group-wise 3D registration based templates to study the evolution of ant worker neuroanatomy

The evolutionary success of ants and other social insects is considered to be intrinsically linked to division of labor and emergent collective intelligence. The role of the brains of individual ants in generating these processes, however, is poorly understood. One genus of ant of special interest is Pheidole, which includes more than a thousand species, most of which are dimorphic, i.e. their colonies contain two subcastes of workers: minors and majors. Using confocal imaging and manual annotations, it has been demonstrated that minor and major workers of different ages of three species of Pheidole have distinct patterns of brain size and subregion scaling. However, these studies require laborious effort to quantify brain region volumes and are subject to potential bias. To address these issues, we propose a group-wise 3D registration approach to build for the first time bias-free brain atlases of intra- and inter-subcaste individuals and automatize the segmentation of new individuals.Comment: 10 pages, 5 figures, preprint for conference (not reviewed

Gendering research in political science

The examination of feminist research on political representation, public policy, and political institutions indicates that a shift in emphasis from the dichotomous variable of sex to the concept of gender is taking place. The shift is incomplete partly because many feminists believe both concepts are necessary to good research design. While mainstream political scientists have become more willing to use sex as a background variable in their research, they have not come to terms with notions of gender, a reluctance that may cause them to make important mistakes in their analysis of politics. Gender is a concept that suggests another major reexamination of what we think about political life. Its implications are insistent and far-reaching, offering a productive means of understanding politics

Traumatic brain injury : integrated approaches to improve prevention, clinical care, and research

Rahul Raj on työryhmän InTBIR Participants Investigators jäsen.Peer reviewe