Crepitus refers to the grinding sensation in one’s knee when the two bones grind against each other. It is a sign of arthritis. Treatment may not be necessary but includes lifestyle changes ...

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Read about our approach to external linking. We're replacing BBC Sounds outside the UK and bringing you BBC.com, a seamless way to read, watch, and listen - all in one place.

Participants performed a cue-picture matching task where cues were either spoken words, in their native or second language, or natural sounds, while their EEG and reaction times were recorded.

OJ Borg sits in... asking for words kids have taught you.OJ Borg sits in... asking for words kids have taught you.