The number of interleavings that a concurrent program can have is typically given as the key difficulty in automatic analysis of concurrent software. Weak memory, as implemented by modern multiprocessors such as Intel x86, IBM Power and ARM, is generally believed to make this problem even harder. On the contrary, we believe that by embracing rather than fleeing from weak memory, we can obtain e...

We report acute onset quadriplegia in a ten year old boy associated with basal ganglia lesions due to biotin deficiency. Prolonged raw egg consumption was identified as predisposing factor for biotin deficiency. Treatment with biotin resulted in remarkable recovery.

To cite: Carswell C, Northey LC, Davies L, et al. Pract Neurol 2015;15:76–79. A 72-year-old man presented with sudden onset of right-sided facial muscle weakness and slurred speech and a 3-day history of fevers, myalgia and sore throat. There was no hyperacusis, change in taste or lacrimation. His history included untreated hepatitis C diagnosed 10 years before, but quiescent at his annual live...