| 释义 |
DictionarySeespasticityclasp-knife spasticity
spasticity [spas-tis´ĭ-te] continuous resistance to stretching by a muscle due to abnormally increased tension, with heightened deep tendon reflexes.clasp-knife spasticity clasp-knife rigidity.clasp-knife spas·tic·i·tya type of increased muscle tone due to a pyramidal tract lesion, in which abnormally increased resistance to passive stretch of a muscle abruptly decreases; typically, this appears near the end of the range of joint excursion.
See also: lengthening reaction. Synonym(s): clasp-knife effect, clasp-knife rigidityclasp-knife spasticity or clasp-knife rigidityn. Rigidity of the extensor muscles of a joint that gives way abruptly to allow easy flexion, resulting from an exaggeration of the stretch reflex.clasp-knife spas·ti·ci·ty , clasp-knife rigidity (klaspnīf' spas-tis'i-tē, ri-jid'i-tē) Initial increased resistance to stretch of the extensor muscles of a joint that give way rather suddenly, allowing the joint then to be easily flexed; the rigidity is due to an exaggeration of the stretch reflex. clasp-knife spas·ti·ci·ty , clasp-knife rigidity (klaspnīf' spas-tis'i-tē, ri-jid'i-tē) Initial increased resistance to stretch of the extensor muscles of a joint that give way rather suddenly, allowing the joint then to be easily flexed; the rigidity is due to an exaggeration of the stretch reflex. |