Neurology (general)/APRAXIA vs. ATAXIA


Bill wrote at 2011-04-25 19:29:59
Praxis is the ability to plan and execute motor movement (aka motor planning). Apraxia is difficulty in responding to stimuli with a motor action. The problem lies somewhere between processing the stimulus, formulating a motor response, and execution.

Ataxia presents as an inability to perform a movement with smooth coordinated movement. This is a limitation present in the cerebellum. The cerebellum receives input from the sensory organs in the skin and other soft tissue and fine tunes movement. When the cerebellum falters it results in jerky movements.

Smokey wrote at 2015-11-11 21:11:33
i have also been trying to figure out the difference between apraxia and ataxia which seem to be used interchangeably in textbooks to describe uncoordinated movement. I have concluded ataxia is a symptom of damage to the cerebellum, spinal cord and/or peripheral nerves while apraxia is a symptom of damage to the cerebral cortex of the parietal lobes on the right and/or left side of the cerebrum where higher level functions are mediated and speech centers also reside which may explain why we only read about "apraxias of speech". I'm guessing the location of the lesion or damage preventing muscle control may be what determines whether the resulting disability is referred to as apraxia or ataxia.  

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Kenneth Burres MD


Ken Burres MD is a Board Certified Neurological Surgeon and Sports Medicine Physician and Software Developer.He is CEO of IFT, Inc/UltraCOACH and is a pioneer in laser spine surgery, as well.He has extensive sports experience including many ultradistance sporting events. As co-developer of UltraCOACH software, he has worked for 13 years of athletic training software and solutions for online sports, etc.He has moderated several online sportsmedicine and fitness sites, notably and


Ken Burres MD has been a neurosurgeon for nearly 30 years and has sports medicine experience for over 20.His sports experiences include: 4 Ironman Triathlons, 145 triathlons, 67 marathons, and multiple ultramarathons.In 1996, he captained Team UltraCOACH at the Eco-Challenge.He has performed over 16,000 operations from the brain and throughout the nervous system.He has two years of engineering physics experience which has helped the development of the artificial intelligence portion of UltraCOAC

BA, MD, Board Certified in Neurological Surgery, Fellow in the American Association of Neurological Surgeons, Fellow in American College of Laser Surgery, Fellow in the American Academy of Sciences, Medical Legal Committee of San Bernardino County Medical Society, Invasive procedures committee, co-chair;;; http://www.ultracch.comCongress of Neurosurgeons, Underwater Medical Society, US Medical Triathlon Association, International College of Surgeons, American Medical Association, California Medical Association, National Association of Web Masters. Mensa, Sierra ClubKen has written articles on neurosurgery, sports medicine, software development, sports training, and has moderated fitness sites, online.

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