Periodically throughout recorded history, puzzling instances of psychiatric and neurologic symptoms have presented en mass<span>: outbursts of thrashing and screaming, or je rky spasms and abrupt vocal tics affecting a group of individuals at once and often attributed to causes like possession, witchcraft, and malingering. Such occurrences of so-called "mass hysteria" continue to confound the medical community, but growing experience has improved the understanding and approach to these seemingly contagious psychogenic events. </span>
Facts from a study showing how video games improve coordination.
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Begin the citation<span> with the title of the specific </span>entry<span>, followed by the year of publication in round brackets</span>
Explanation:
In the slave societies of the Americas, a quadroon or quarteron was a person with one quarter African and three quarters European ancestry (or in Australia, one quarter aboriginal ancestry).
Shrew usually means an angered or a bad-tempered person.
