A computational model for angular velocity integration in a locust heading circuit.

Accurate navigation often requires the maintenance of a robust internal estimate of heading relative to external surroundings. We present a model for angular velocity integration in a desert locust heading circuit, applying concepts from early theoretical work on heading circuits in mammals to a novel biological context in insects. In contrast to similar models proposed for the fruit fly, this circuit model uses a single 360° heading direction representation and is updated by neuromodulatory angular velocity inputs.

[IQWiG evidence report on psychological consequences of abortion].

The Institute for Quality and Efficiency in Health Care (IQWiG) was commissioned by the Federal Ministry of Health to provide support for the further development of the S2k guideline on first-trimester abortion into an S3 guideline. To this end, the responsible guideline group formulated research questions that were answered in IQWiG evidence reports. One of the questions to be addressed was the evidence regarding the psychological consequences of an abortion in the first trimester compared to no abortion in the first trimester in pregnant women who wish to have an abortion.

Analysis of skin and corneal fiber electrodes for electroretinogram assessments in patients with major depressive disorder.

Background: Electroretinograms (ERG) are usually recorded with non-invasive corneal electrodes, requiring direct contact with the ocular surface. However, corneal electrode application is not tolerated by some individuals. The advent of handheld ERG devices has facilitated the use of skin electrodes for ERG measurements.