Plural of apraxia; multiple instances or different types of disorders affecting the ability to execute learned, purposeful movements.
From Greek 'a-' meaning 'without' and 'praxis' meaning 'practice.' The plural form became standard in medical literature as neuroscience identified multiple varieties of this disorder.
Doctors discovered that there isn't just one 'apraxia'—there's apraxia of speech, constructional apraxia, ideational apraxia—showing how the brain compartmentalizes movement in surprising ways.
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