BMJ 2011; 342 doi: https://doi.org/10.1136/bmj.d60 (Published 10 January 2011) Cite this as: BMJ 2011;342:d60

A device for measuring blood pressure has been field tested for use in low resource settings. The device was manufactured according to WHO criteria and is inexpensive, semi-automated, and solar powered. It was successfully validated against a European protocol and later tested in Uganda and Zambia, where it was found to be valid for systolic, but not diastolic, blood pressure. Agreement between the solar powered device and a sphygmomanometer for systolic blood pressure was 93.7%. Given the choice, patients preferred the new device, and its operational simplicity is likely to appeal to non-physician health workers (Hypertension 2010;56:1047-53, doi:10.1161/hypertensionaha.110.160408).

The size of the amygdala has been found to correlate with the size and complexity of social networks in adult humans, confirming previous research that suggests the amygdala is important for social behaviour (Nature Neuroscience 2010, doi:10.1038/nn.2724). Participants reported the number of regular contacts they maintain and the number of different social groups these contacts belong to, and then had their brains …

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