Topics

Neurology

EXPLAINER

What actually causes a muscle cramp?

The familiar explanation — dehydration and lost salts — is the weakest part of the evidence. The better-supported idea is that cramping is a failure of nerve control, which is why a mouthful of pickle juice can stop one.

WHAT THE STUDY ACTUALLY SAYS

Prasinezumab missed its main goal in a Parkinson's trial

The anti-alpha-synuclein antibody did not significantly delay motor progression in the phase 2b PADOVA study, though a non-significant trend and secondary signals keep a phase 3 trial alive.

WHAT THE STUDY ACTUALLY SAYS

An siRNA eased myasthenia gravis in the phase 3 NIMBLE trial

Cemdisiran, a gene-silencing drug given under the skin once every three months, cut daily-living scores more than placebo in antibody-positive generalised myasthenia gravis, a rare complement-driven disease.