Jackofknives
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Could someone please explain the definition of and distinctions between
Ideomotor apraxia and
Ideational apraxia
Where are the possible sites of lesion. And give examples to what the patient can and cannot do.
Edited by Jackofknives on 06/01/07 - 09:24 AM
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| po
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let me try,
alright here is the link.
http://www.answers.com/topic/apraxia
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| po
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what I get from this link is-
"apraxia" can be used to classify the inability of a person to perform voluntary and skillful movements of one or more body parts, even though there is no evidence of underlying muscular paralysis, incoordination, or sensory deprivation. Additionally, motor performances in response to commands, imitation tasks, and use of familiar objects may be equally difficult but not attributable to dementia or confusion.
three major types of apraxia, each of which is caused by different sites of brain damage: ideational, ideo-motor, and kinetic.
Pathology:ideational, ideo-motor, and kinetic apraxias have pathologies involving either the back (parietal-occipital), middle (parietal), or front (frontal) lobes of the cerebral cortex, respectively.
1.ideational apraxia cannot consistently produce complex serial actions, particularly with objects, due to disruptions at the conceptual stage of motor planning where the purpose and desire to perform specific movements are formulated.
Eg.patients with ideational apraxia are requested to demonstrate proper use of a toothbrush, they might first brush their nails, then hesitate and brush their pants, and finally, with prompting, brush their teeth. Their actions will likely be slow and disorganized, appearing as though they have to think out each movement along the way.
2.The patient with this disorder fails to translate the idea to perform specific movements into a coordinated and sequential scheme of muscle contractions to achieve the desired motor goal.
Eg. If asked to demonstrate use of a pair of scissors, unlike ideational apraxics, individuals with ideo-motor apraxia will not make the mistake of using this tool as if it were a screwdriver. Rather, they might grasp the scissors with both hands and repetitively open and close the blades, or pick up the paper in one hand and the scissors in the other and rub them against one another with hesitant motions.
3.Kinetic apraxia is characterized by coarse, clumsy, groping, and mutilated movement patterns, especially on tasks that require simultaneous, sequential, and smooth contractions of separate muscle groups.
Eg.Typing, playing a musical instrument, and handwriting tasks are very difficult for the individual with kinetic apraxia. The problem is not with preliminary motor planning, as in ideo-motor apraxia. Instead, the kinetic apraxic suffers from disturbances in programming the motor plan into subunits of sequential muscle behaviors.
SPECIAL MENTION-Apraxia of speech is a subtype of kinetic apraxia.
speech apraxia struggle with dysfluent articulation problems, as they grope to posture correctly sequential tongue, lip, and jaw movements during speech activities. Numerous, but variable articulatory errors occur, characterized by false starts, re-starts, sound substitutions, sound and word repetitions, and overall slow rate of speech. Multisyllabic words and complex word combinations are most vulnerable to these types of breakdowns.
Now what is the diff dysarthria and Apraxia of speech?
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| po
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from-
http://www.csuchico.edu/~pmccaffrey//syllabi/SPPA...
Dysarthria
Dysarthric errors result from a disruption of muscular control due to lesions of either the central or peripheral nervous systems. In this way, the transmission of messages controlling the motor movements for speech is interrupted. Because it involves problems with the transfer of information from the nervous system to the muscles, dysarthria is classified as a neuromotor disorder.
Central Nervous System Lesions
Damage to the pyramidal tract causes spastic dysarthria. Lesions of the substantia nigra cause hypokinetic dysarthria. Disruption of feedback loops involving the cerebellum cause ataxic dysarthria.
Peripheral Nervous System Lesions
Finally, damage to any part of the peripheral nervous system serving the muscles of speech causes flaccid dysarthria.
Apraxia
Apraxia results from an impaired ability to generate the motor programs for speech movements rather than from the disordered transmission of controlling messages to the speech musculature. Apraxia is a planning/programming problem, not a movement problem like dysarthria.
Apraxia occurs following damage to Broca's Area, or Brodmann's area 44, which is located on the third gyrus of the left frontal lobe. Thus, apraxia is always the result of a central nervous system lesion. It is a cortical problem, not a motor impulse transmission problem like dysarthria.
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| Jackofknives
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Thx Po, it makes sense now.
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There are many things in this world that can’t be changed no matter how hard you try. That’s why you must not hesitate when the time comes where you have to give it all you’ve got.
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| tompat
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good explanation po
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| po
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welcome;me too needed clarification,
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| Dr.Papez
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good thread.
Limb kinetic apraxia is more of subtle clumsiness often linked to pyramidal dysfunction. This term is out of favor now.
Ideomotor is inablity to perform (mime) simple motor tasks-they do better with real objects. Like asking the patient to pantomime -combing (assume that you have a comb in your hand and show me how you comb your hair) or waving good bye.
Ideational is often a combination of many factors of cognition. As po mentioned they have great difficulty in doing some act that involves series of steps-like lighting a torch- put batteries, close lid and push the button. they have trouble following the right sequence. They may exhibit temporal (sequence) or spatial errors (like holding the torch upside down!).
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