Hypertonicity vs spasticity: Difference between revisions
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<span> </span>1-hypertonicity or spastic dystonia is a continues increase in the muscle tension without regarding to the movement and is dependent upon afferent information from feedback following movements of stretch , decorticat and decerbrate rigidity are a form of spastic dystonia, spastic dystonia is considered to be a form of sustained efferent muscular hyperactivity , dependent on continues supraspinal derive to the alpha motor neuron<ref name="Jeffery et. al.2002">Clinical evaluation and management of spasticity,2002</ref> | <span> </span>1-hypertonicity or spastic dystonia is a continues increase in the muscle tension without regarding to the movement and is dependent upon afferent information from feedback following movements of stretch , decorticat and decerbrate rigidity are a form of spastic dystonia, spastic dystonia is considered to be a form of sustained efferent muscular hyperactivity , dependent on continues supraspinal derive to the alpha motor neuron<ref name="Jeffery et. al.2002">Clinical evaluation and management of spasticity,2002</ref> | ||
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The- spasticity is a velocity dependent increase in muscle tone in regarding to passive movement, | The- spasticity is a velocity dependent increase in muscle tone in regarding to passive movement, | ||
-neural component of spasticity: pyramidal tract lesion , pyramidal tract injury doesn't give raise to spasticity | -neural component of spasticity: pyramidal tract lesion , pyramidal tract injury doesn't give raise to spasticity | ||
the main symptoms are weakness and loss of dexterity which is greater in distal than in the proximal muscles, | the main symptoms are weakness and loss of dexterity which is greater in distal than in the proximal muscles, | ||
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2-MRT & 3- VST : they have facilitatory effect on the extensor tone, | 2-MRT & 3- VST : they have facilitatory effect on the extensor tone, | ||
- all the three systems are though to inhibit flexor reflex afferents responsible for flexor spasm< | - all the three systems are though to inhibit flexor reflex afferents responsible for flexor spasm | ||
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Revision as of 10:55, 18 March 2014
1-hypertonicity or spastic dystonia is a continues increase in the muscle tension without regarding to the movement and is dependent upon afferent information from feedback following movements of stretch , decorticat and decerbrate rigidity are a form of spastic dystonia, spastic dystonia is considered to be a form of sustained efferent muscular hyperactivity , dependent on continues supraspinal derive to the alpha motor neuron[1]
The- spasticity is a velocity dependent increase in muscle tone in regarding to passive movement,
-neural component of spasticity: pyramidal tract lesion , pyramidal tract injury doesn't give raise to spasticity
the main symptoms are weakness and loss of dexterity which is greater in distal than in the proximal muscles,
- pyramidal tract is the system which balance the muscle tone.-the key tracts are :
1-DRT : Has inhibitory effect on MRT &VST
2-MRT & 3- VST : they have facilitatory effect on the extensor tone,
- all the three systems are though to inhibit flexor reflex afferents responsible for flexor spasm
- ↑ Clinical evaluation and management of spasticity,2002
