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Spastic cerebral palsy is general y considered to result from cerebral cortical or pyramidal tract damage. Here, we precisely targeted the left pyramidal tract of 2-month-old Sprague-Dawley rats placed on a stereotaxic instrument under intraperitoneal anesthesia. Based on the rat brain ste-reotaxic map, a 1-mm hole was made 10 mm posterior to bregma and 0.8 mm left of sagittal suture. A microsyringe was inserted perpendicularly to the surface of the brain to a depth of 9.7 mm, and 15μL of ethanol was slowly injected to establish a rat model of spastic cerebral palsy. After modeling, the rats appeared to have necrotic voids in the pyramidal tract and exhibited typical signs and symptoms of flexion spasms that lasted for a long period of time. These findings indicate that this is an effective and easy method of establishing a rat model of spastic cerebral palsy with good re-producibility. Ethanol as a chemical ablation agent specifical y and thoroughly damages the pyra-midal tract, and therefore, the animals display flexion spasms, which are a typical symptom of the disease.
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选择性腰骶脊神经后根切断术治疗脑性瘫痪儿的下肢痉挛
Objective To investigate therapeutic effect of selective posterior rhizotomy in the treatment of lower limbs spasm following cerebral palsy.Method 106 cases received selective posterior rhizotomy.Postoperational follow up was carried for 6～ 36 months,averagely 18 months.Result All cases showed complete relief in muscular spasm,decreased muscular tension.Ashworth grade (1～ 1.5)was 1.3.Dynamic abnormality in joints were all corrected.Conclusion Selective posterior rhizotomy can effectively relieve lower limbs spasm,reduce muscular tension and correct dynamic joint abnormality.
