Aspects of this topic are discussed in the following places at Britannica.
Ideokinetic apraxia is caused by an interruption of impulses in the association tracts of the nervous system, so that there is no coordination between ideation and motor activity. An affected individual will complain, for example, that he cannot use his hand, but then he will slap a mosquito with it. People with ideokinetic apraxia are unable to perform certain acts (e.g., whistling or making a...
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