Apraxia is a disorder of motor planning leading to the loss of ability to carry out a learned purposeful movement, despite having the desire and the physical ability to perform that movements.
Patients with gait apraxia, caused by Parkinsonism, NPH or frontal lobe dysfunction, have particular difficulty initiating gait and making turns, often with a tendency to freeze, but a relative preservation of straight-line gait once initiated:
A newspaper article from the UK reported the case of a 58-year-old man with Parkinson’s and severe “gait freezing”. He required visual guides to help him move one foot in front of the other and was unable to turn while walking. After a few steps he would lose his balance and then require his wheelchair. However, he could still ride his bicycle, flawlessly:
This is extreme gait apraxia – he is able to move his legs and control he balance enough to ride a bike, and yet is unable to do so for the (much easier) task of walking.
Click here to read the full article.
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