Hypertonicity vs spasticity: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
[[Image:Decorticate.jpg]]<br> | [[Image:Decorticate.jpg]]<br> | ||
<span | = <span />Hypertonicity or spastic dystonia = | ||
<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> | |||
= Spasticity = | |||
<span class="Apple-style-span" style="line-height: normal; font-size: medium; " /> | |||
- | <span class="Apple-style-span" style="line-height: normal; font-size: medium; " /> | ||
= <span class="Apple-style-span" style="line-height: normal; font-size: medium; "> | |||
- spasticity is a velocity dependent increase in muscle tone in regarding to passive movement | |||
== pyramidal tract lesions | |||
== | |||
- all the three systems are though to inhibit flexor reflex afferents responsible for flexor spasm | -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. | |||
== neural component of spasticity: == | |||
1-Dorsoreticulospinal tract (DRT) : Has inhibitory effect on MRT &VST | |||
2-medial reticulospinal tract (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 | |||
</span> = | |||
<font class="Apple-style-span" size="3"><span class="Apple-style-span" style="line-height: normal;"> | |||
</span></font> | |||
<br> | |||
<references /> | <references /> | ||
Revision as of 07:00, 19 March 2014
Hypertonicity or spastic dystonia[edit | edit source]
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]
Spasticity[edit | edit source]
= - spasticity is a velocity dependent increase in muscle tone in regarding to passive movement
== pyramidal tract lesions
==
-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.
neural component of spasticity: [edit | edit source]
1-Dorsoreticulospinal tract (DRT) : Has inhibitory effect on MRT &VST
2-medial reticulospinal tract (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
