Apraxia

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Basics

  • loss of the ability to correctly carry out certain movements in response to stimuli that normally elicit these movements

Subtypes

Ideomotor apraxia

  • Commands to perform a specific motor act (e.g., cough or blow out a match) or to pantomime the use of a common tool (e.g., a comb or toothbrush) in the absence of the real object cannot be followed
  • lesion of the supramarginal gyrus in the dominant lobe (an idea to move arises from the temporo-parietal association area)

Kinetic and gait apraxia

  • involves a clumsiness in the actual use of tools that cannot be attributed to sensory, pyramidal, extrapyramidal, or cerebellar dysfunction
  • lesion of the motor and premotor areas of the frontal lobe respectively

Resources