Monday, March 10, 2008

Changes in muscle tension

Static muscle relaxation outlined in a state of tension was known as muscle tension. Muscle tension is to maintain the body postures and movements of a normal basis, and to take many forms. If people in stationary supine rest, physical ministries have the muscle tension called static muscle tension. Body when standing up, although not significantly muscle contraction, but also the muscles around the body to maintain a certain tension, to maintain the standing postures and physical stability, as postural muscle tension. Muscle movement in the process of tension, known as exercise-induced muscle tension, muscle movement is to ensure continuous, smooth (no tremor, convulsion, spasticity) of the important factors. Muscle tension is generated and maintained a complex reflex activity, and the reflex arc is called "r-loop" including r-loop part of the introduction (muscle tension baroreceptor reflex is a nerve and muscle spindle nerve-spindle) and the r-came out of the loop (anterior horn cells of spinal cord and brainstem motor neurons of the nucleus of a motor neuron, the disclaimer extrfusal. r motor neuron fibers issued Ar arrived and disclaimer intrafusal). Its reflex arc of any of the lesions were caused muscle tension can be changed. Cause pathogenesis of various myopathy, myasthenia gravis, peripheral neuropathy, Yan nerve root or cerebellar damage appeared to reduce muscle tension. Ontology feelings of spinal cord nerve fibers can also block muscle tension decreased. Children with acute hemiplegia at a standstill early will have hypotonia, a few days or a few weeks after the increased muscle tone, enhance tendon reflexes. Familial periodic paralysis, narrow reversing disease, epilepsy seizures lose tension there paroxysmal or intermittent muscle Zhang lower. Cone system diseases Hypertonia. Extrapyramidal, bottom lesions muscle tension can be reduced or increased, sometimes for performance gear like Hypertonia. Decerebrate rigidity at significantly increased muscle tension, limb rigidity, lower extremity Extension limb flexion back to the first. A clinical performance. Reduce muscle tension : muscle relaxation activities body was encountered resistance diminishes, Intramuscular lack of expansion of the abdominal muscles and normal toughness and relaxation. Can be different because of the location of the lesions and clinical manifestations vary. Anterior horn damage with segmental distribution by the weakness, no sensory dysfunction, muscle tremor. Peripheral nerve damage associated with weakness, sensory dysfunction, tendon reflexes often diminish or disappear. Some muscle and nerve diseases joints reduce muscle tension, weakness, with or without atrophy, muscle fiber without tremor and sensory impairments. The spinal cord or peripheral nerve fiber damage proprioception often accompanied by feelings and deep reflection disappeared, was feeling walking gait ataxia. Cerebellar system damage with motor ataxia, was slowly walking gait. New striatal lesions with dance-like movement. 2. Hypertonia : a spastic ankylosing was two. The spastic muscle tension associated with increased in the cone beam damage, spinal reflex of being easy. Patients with passive movement, muscle tension increased in cases where impedance flu, flu impedance with the speed of the movement. Rapid reduction in the drafting of the state immediately caused muscle contraction is spasticity, drawing to a certain extent, resistance suddenly disappeared, the so-called folding knife-like muscle tension increased. Spastic muscle hypertonia and "spasm" have nothing to do, which means a single involuntary muscular contraction. Myotonic Tension increased extrapyramidal disease found in some of the special tension of change, its hypermyotonia selective, within arm adductor, flexor and pronator muscles mainly to lower limb extensor muscle hypertonia advantage. Passive limb movement encountered by the resistance than the spastic were small, But time and the length of muscle contraction pattern that has no ties in the flexor and extensor no distinction between. Whether the movement speed, magnitude and direction, it will encounter the same resistance. Hypermyotonia such as lead-pipe rigidity, as a result of the tremor with the turn caused the loose, tight changes, Gear-called ankylosis.

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