Modifications in Prefrontal Cortex Oxygenation in Linear and Curvilinear Dual Task Walking: A Combined fNIRS and IMUs Study.

Increased oxygenated hemoglobin concentration of the prefrontal cortex (PFC) has been observed during linear walking, particularly when there is a high attention demand on the task, like in dual-task (DT) paradigms. Despite the knowledge that cognitive and motor demands depend on the complexity of the motor task, most studies have only focused on usual walking, while little is known for more challenging tasks, such as curved paths. To explore the relationship between cortical activation and gait biomechanics, 20 healthy young adults were asked to perform linear and curvilinear walking trajectories in single-task and DT conditions.

One- and two-dimensional 1H-NMR analysis of lipids extracted from erythrocytes and plasma of humans.

A combination of established lipid extraction procedures and high-resolution 1D and 2D NMR spectroscopic methods has been used to analyze qualitatively and quantitatively the lipid composition of human erythrocytes and plasma. The major lipids present in each structural class were identified and quantified. Considerable information on the composition of unsaturated fatty acid chains were obtained for the intact lipids without resort to hydrolysis.