Hypertonicity vs spasticity
Original Editors - Saeed Dokhnan
Top Contributors - Saeed Dokhnan, Laura Ritchie, Lucinda hampton, Admin, Evan Thomas, Scott Buxton, Kate Sampson, Kim Jackson and Aya Alhindi
Hypertonicity or spastic dystonia[edit | edit source]
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]
[edit | edit source]
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]
- Dorsoreticulospinal tract (DRT) : Has inhibitory effect on MRT &VST
- medial reticulospinal tract (MRT) &
- Vestibulospinal tract ( VST ):
- they have facilitatory effect on the extensor tone
- all the three systems are though to inhibit flexor reflex afferents responsible for flexor spasm
References[edit | edit source]
- ↑ Clinical evaluation and management of spasticity, Jeffery et. al.2002
