健侧颈_7椎体前路移位直接修复下干联合股薄肌移植治疗臂丛根部撕脱伤

目的 探讨健侧颈7神经椎体前路移位直接修复下干联合功能性股薄肌移植重建术治疗全臂丛根部撕脱伤的手术设计及其临床疗效.方法 12例全臂丛根性撕脱伤患者,于伤后1～3个月行臂丛神经根干部探查,一期健侧颈,经椎体前路移位直接修复患侧C_8T_1-下干,同时行膈神经移位修复肩胛上神经9例.于一期术后4-8个月分别行二期吻合血管的股薄肌移植(以副神经斜方肌支为缝接神经)重建屈肘、伸指伸拇功能.结果 随访9～36个月.一期术后3个月12例患侧尺神经、正中神经Tinel征至上臂近段平面,术后6个月至肘关节与前臂近段平面,9个月至前臂远段与腕部.9例12个月Tinel征至手掌、手指部.7例术后9个月胸大肌胸肋部收缩,12个月肩内收可夹持物品;5例术后15-18个月手掌、手指与前臂内侧均有触痛觉恢复,尺侧腕屈肌和示、中、环、小指屈指肌收缩.3例术后24个月,拇指屈曲,1例鱼际肌出现收缩(M_1).二期股薄肌移植功能重建术后有7例于二期术后4～7个月移植肌肉收缩;9～12个月屈肘90°～120°(M_3),伸指伸拇M_3 .结论 健侧颈_7神经经椎体前路移位直接修复C_8T_1-下干术,联合二期股薄肌移植重建屈肘、伸指伸拇功能治疗全臂丛根部撕脱伤的手术设计具有可操作性,初步观察神经再生进程顺利,能恢复手腕、手指的屈曲与感觉功能,重建屈肘、伸指功能.     

健侧C7神经根移位治疗儿童臂丛根性撕脱伤

目的 回顾性调查健侧C7神经根移位术在儿童臂丛根性撕脱伤中应用的疗效及特点.方法 对12例分娩或其他创伤引起的儿童臂丛根性撕脱伤患者应用健侧C7神经根合并其他神经移位术进行修复.通过带尺侧上副血管蒂的尺神经移植修复正中神经4例,桡神经1例,同时修复肌皮神经肱二头肌支和正中神经4例;通过3～4股游离腓肠神经移植修复上干或外侧束3例.5例手术一期完成,7例二期完成.结果 随访至少21个月,平均42个月.全部病例均得到较好的感觉恢复(≥S3,MRC).10例得到了明显的运动功能改善(≥M2+,改良MRC).7例所获得的运动与感觉功能几乎不伴有健肢的同步兴奋,这些手术的受体神经均为支配肩、肘部的神经或肌皮神经肱二头肌支与正中神经同时接受移位.健肢除轻微的感觉异常外,2例婴儿还出现短暂的肩外展减弱.结论 健侧C7神经根移位对儿童臂丛根性撕脱伤疗效肯定且对健肢安全.在一定条件下,一期与二期手术疗效基本相同.将动力神经移位于不同受体神经有助于改善功能恢复的质量.     

肌电图-神经电图测定健侧颈_7神经根移位桥接至受体神经后再生的临床研究

目的　用肌电图 -神经电图检测方法 ,研究健侧颈 7神经根移位通过桥接至受体神经后再生的状况。方法　 1996年 3月至 1998年 9月 ,对 2 8例健侧颈 7移位二期手术后患者 ,定期进行肌电图 -神经电图随访。术后随访时间为 3～ 5 8个月 ,平均 15 .4个月。分别在胸锁关节、胸腋部、腋部、肘部或外侧肌间隔刺激受体神经 (肌皮神经、桡神经和正中神经 ) ,于该神经支配的相应肌肉上记录复合肌肉动作电位 (CMAP) ,测定其潜伏期 (L at)、波幅 (Amp)。计算出动力神经纤维在受体神经的运动传导速度(MNCV) ,并观察其肌电图表现。结果　患侧桡、肌皮和正中神经支配的相应肌肉 ,分别在术后 4、6和 12个月时检测到神经再生电位。结论　健侧颈7神经根移位后 ,受体神经中出现再生电位最早的为肌皮神经 ,桡神经次之 ,正中神经最晚     

健侧颈7神经经椎体前路移位直接修复臂丛根部撕脱伤

目的 探讨健侧C7神经经椎体前路移位、一期直接修复臂丛根部撕脱伤的临床疗效.方法 对臂丛根性撕脱伤伤后1～3个月行健侧C7神经经椎体前路移位直接修复术16例.在健侧C7神经前、后股汇入外侧束、后束平面后作显微解剖分离以切取健侧C7的最大长度.健侧C7神经均可顺利经前斜角肌内侧隧道-椎体前路引至患侧,一期与患侧C8、T1-下干直接缝合10例,与患侧C5、6-上千直接缝合4例,与患侧C6、C8神经根直接缝合2例.结果 健侧C7根干前、后股切取长度分别为(7.71±1.16)和(6.97±1.18)cm.一期直接修复c8、T1-下干组经6～18个月随访8例,术后6个月尺、正中神经Tinel征阳性平面至肘关节.有2例术后9个月胸大肌胸肋部收缩(M3),术后12～18个月,手掌、手指与前臂内侧均有触痛觉恢复,尺侧腕屈肌和示、中、环、小指屈肌收缩(M3).结论 健侧颈7神经经椎体前路移位、一期直接修复C8、T1-下干的手术设计具有可操作性,是治疗臂丛根部撕脱伤的有效方法.     

健侧C7神经移位修复臂丛神经根干部损伤的改良术式

目的 证实移植神经经胸锁乳突肌下方通道的改良术式修复臂丛神经根干部损伤的可行性和优点。方法 2001年2月至2002年12月，对10例臂丛神经根干部损伤患者行健侧C7神经移位于思侧臂丛上干或下干。术中发现两神经断端间距为5．5cm～10cm，平均7．8cm。采用桡浅神经、腓肠神经、前臂外侧皮神经及前臂内侧皮神经等为移植神经，桥接健侧C7神经和患侧受神经。将移植神经经胸锁乳突肌下方通道为该术式的改良处。结果 3例患者术后随访时间较短未统计在内。7例患者术后随访6～15个月，6例修复上干者，其中2例的屈肘肌力为M3、肩外展肌力M2，2例屈肘、肩外展肌力M1-2,2例腋神经、肌皮神经肌电图有运动动作电位出现。1例修复下干者，刺痛觉恢复至腕部，正中、尺神经肌电图示有运动动作电位出现。结论 健侧C7神经移位术中移植神经经胸锁乳突肌下方通道是可行的。其优点是缩短移植神经的长度和充分利用健侧C7的神经动力源。     

大鼠改良颈7移位术的电生理研究

目的观察改良颈7移位术修复二组受损神经的电生理变化.方法建立大鼠颈7改良移位术模型（同侧颈7神经根后股,经同侧尺神经作为桥接神经分为两股与肌皮神经和正中神经内侧头缝合）,并与传统单组移位组进行神经电生理测定和比较.结果移位神经的各项电生理指标显示：术后早期（2～6周）,颈7二组神经移位组神经再生劣于同时间段单组移位组.随观察时间的延长,术后8周起,二组神经移位组肌电动作电位潜伏期及最大诱发电位波幅指标逐渐接近单组移位组和正常对照组,至12周上述指标与各组差异无统计学意义（P＞0.05）.结论大鼠改良颈7移位术电生理变化和传统单组移位术相近,说明颈7具有良好的再生潜力,可同时支配两组受损神经.     

健侧C_7神经联合多组神经移位治疗全臂丛神经根性撕脱伤正中神经功能随访

目的探讨健侧C7神经联合多组神经移位治疗全臂丛神经根性撕脱伤后正中神经功能的恢复情况。方法自2005-06—2010-06诊治40例全臂丛神经根性撕脱伤,首先行臂丛神经探查和健侧C7移位术一期。间隔4~8个月后完成健侧C7移位术二期及附加其他神经移位,按附加手术的不同分为3组,其中第1组10例健侧C7神经根移位于正中神经附加膈神经移位肌皮神经;第2组15例健侧C7神经根移位于正中神经附加肋间神经移位肌皮神经;第3组15例健侧C7神经根分2股分别移位于正中神经和肌皮神经附加副神经移位肩胛上神经。结果 40例获得随访3年余,1、2、3组有效率分别达50%、60%、73.3%。3组间差异无统计学意义(P0.05)。结论健侧C7神经根联合多组神经移位治疗全臂丛神经根性撕脱伤可获得较好的疗效,但不同附加术式未见明显疗效差异。     

改良的尺神经桥接健侧C7治疗臂丛神经撕脱伤

目的 探讨肘上段尺神经桥接健侧C7神经修复正中神经，治疗臂丛神经撕脱伤的可行性。方法 尺神经在进入肘管前切断，然后将近端分离至内侧束，将尺神经经胸大肌的深面穿出，经胸前及颈部皮下隧道牵至健侧颈部切口与C7神经根缝合，二期修复正中神经。术中观察尺神经远端的血供并测量长度。结果 本组全臂丛神经撕脱伤13例，中、下干撕脱伤2例，均为男性，年龄14～45岁，平均27岁；受伤时间：1．5～11个月，平均5个月。肘上段尺神经翻转与健侧C7神经根缝合12例；肘上段尺神经及前臂内侧皮神经一起翻转与健侧C7神经根缝合3例。肘上段尺神经的长度21cm～-27cm，平均24．7cm，15例尺神经远端血供均良好。尺神经自穿出胸大肌处至健侧C7的距离15cm～2cm，平均17．8cm。结论 肘上段尺神经桥接健侧C7神经修复正中神经治疗臂丛神经撕脱伤较传统的手术方法简便、易行。     

健侧C_7神经根移位治疗臂丛神经根性撕脱伤的疗效观察

目的观察健侧C7神经根移位修复臂丛神经根性撕脱伤术后患侧肢体运动、感觉功能恢复情况,以及该术式对健侧肢体的影响。方法 2008年8月-2010年11月,采用健侧C7神经根移位修复全臂丛神经根性撕脱伤22例。患者均为男性;年龄14～47岁,平均33.3岁。术前临床检查及电生理检测均确诊为全臂丛神经根性撕脱伤。其中修复正中神经16例,桡神经3例,肌皮神经3例;一期手术2例,二期手术20例。观察手术前、后患侧肢体运动、感觉功能恢复情况。结果 21例患者获随访,随访时间7～25个月,平均18.4个月。健侧C7神经根修复正中神经:屈腕肌肌力达3级或以上10例,屈指肌肌力达3级或以上7例;感觉恢复达S3或以上11例。健侧C7神经根修复肌皮神经:屈肘肌肌力达3级或以上2例;前臂外侧皮肤感觉达3级2例。健侧C7神经根修复桡神经(失访1例)伸腕肌肌力达3级1例;感觉恢复达S3 1例。结论健侧C7神经根全干移位修复全臂丛神经根性撕脱伤效果较好,分期手术是提高疗效的重要因素。     

健侧C7神经根移位治疗臂丛神经根性撕脱伤的疗效观察

目的观察健侧C7神经根移位修复臂丛神经根性撕脱伤术后患侧肢体运动、感觉功能恢复情况,以及该术式对健侧肢体的影响。方法 2008年8月-2010年11月,采用健侧C7神经根移位修复全臂丛神经根性撕脱伤22例。患者均为男性;年龄14～47岁,平均33.3岁。术前临床检查及电生理检测均确诊为全臂丛神经根性撕脱伤。其中修复正中神经16例,桡神经3例,肌皮神经3例;一期手术2例,二期手术20例。观察手术前、后患侧肢体运动、感觉功能恢复情况。结果 21例患者获随访,随访时间7～25个月,平均18.4个月。健侧C7神经根修复正中神经:屈腕肌肌力达3级或以上10例,屈指肌肌力达3级或以上7例;感觉恢复达S3或以上11例。健侧C7神经根修复肌皮神经:屈肘肌肌力达3级或以上2例;前臂外侧皮肤感觉达3级2例。健侧C7神经根修复桡神经(失访1例)伸腕肌肌力达3级1例;感觉恢复达S3 1例。结论健侧C7神经根全干移位修复全臂丛神经根性撕脱伤效果较好,分期手术是提高疗效的重要因素。     

Clinical application of axonal repair technique for treatment of peripheral nerve injury

Althoughtheapplicationoffinemicrosurgicaltechniquewithepineurialorperinurialstitcheshasimprovedtheoperativeefficacyofperipheralnerveinjuriestoa greatextent ,thetotaloutcomeofnerverepair ,however ,isnotallthatcouldbedesired .1Thecruxliesmostlyinthemisdirectionoftheregeneratingaxonscausedbythedisorganizationoftheinternalfascicularstructure .2DeMedinaceli3describedanewtechniqueofnerverepair,termed ”cellsurgery”,withwhichtheperipheralnerveisrepairedattheaxonallevelbyminimizingphysicalandchemical…     

椎管内修复臂丛神经损伤的解剖及临床应用研究

目的观察通过打开椎管找到残存的臂丛神经根并进行神经修复的可行性。方法甲醛溶液固定的成人尸体标本15具30侧，测量C5-T1，神经前根椎间孔段的直径、长度和有髓神经纤维计数。选择5例臂丛神经损伤患者，2例为椎孔处刀刺伤，3例为闭合性创伤。自受伤到椎管内探查的时间为3-6个月，平均4个月。CTM显示部分已损伤的神经根其椎管内神经前后根仍存在，而锁骨上臂丛神经探查在椎间孔外找不到相应的具有正常结构的神经根近端，通过打开椎管将椎管内残存的神经根用腓肠神经桥接进行神经修复。结果C5-T1，神经前根的有髓神经纤维数目为4000-6000根，椎间孔段的长度为11～14mm，外径为1．2～1．5mm。5例患者的椎管内均找到了具有正常结构的神经根近端，其中C5神经根3例，C5、C6神经根1例，C7神经根1例。C5修复肩胛上神经和C5神经远端各1例，C5修复正中神经内侧头1例，C7修复内侧束1例，C5、C6分别修复上干后股、肌皮神经1例。术后随访38--46个月，平均42个月。5例患者其修复神经所支配肌肉的肌力分别达3-4级。结论对于神经根在椎间孔处断裂的臂丛神经损伤，可通过打开椎管找到损伤神经根的近端，为臂丛神经根性损伤的修复提供理想的动力神经源，有利于臂丛神经治疗效果的提高。     

Outcome of contralateral C7 transfer to two recipient nerves in 22 patients with the total brachial plexus avulsion injury

The treatment of total brachial plexus avulsion injury is difficult with unfavorable prognosis. This report presents our experience on the contralateral C7 (CC7) nerve root transfer to neurotize two recipient nerves in the patients with total BPAI. Twenty‐two patients underwent CC7 transfer to two target nerves in the injured upper limb. The patients' ages ranged from 13 to 48 years. The entire CC7 was transferred to pedicled ulnar nerve in the first stage. The interval between trauma and surgery ranged from 1 to 13 months. The ulnar nerve was transferred to recipients (median nerve and biceps branch or median nerve and triceps branch) at 2–13 months after first operation. The motor recovery of wrist and finger flexor to M3 or greater was achieved in 68.2% of patients, the sensory recovery of median nerve area recovered to S3 or greater in 45.5% of patients. The functional recovery of elbow flexor to M3 or greater was achieved in 66.7% of patients with repair of biceps branch and 20% of patients with repair of the triceps branch (P < 0.05). There were no statistical differences in median nerve function recovery at comparisons of the age younger and older than 20‐years‐old and the intervals between trauma and surgery. In conclusion, the use of CC7 transfer for repair two recipient nerves might be an option for treatment of total BPAI. The functional recovery of the repaired biceps branch appeared to be better than that of the triceps branch. © 2013 Wiley Periodicals, Inc. Microsurgery 33:605–611, 2013.     

健侧颈7神经根移位修复多条神经模型的建立及功能恢复动态观察

目的比较七种不同术式的健侧颈，神经根移位术后受体神经的功能以探讨颈，神经重建多组神经的可行性。方法SD大鼠105只，随机分为7组，每组15只。建立传统的健侧颈，移位经尺神经近端（单根）接正中神经或肌皮神经或桡神经（A、D、G组），健侧颈，经尺神经近端（2股，合干法）接正中、肌皮神经或正中、桡神经（B、E组），健侧颈，经尺神经及腓肠神经（分干法）接正中、肌皮神经或正中、桡神经（C、F组）。术后观察患肢功能，抓握力及梳洗动作出现时间。结果术后2个月，修复正中和肌皮神经的B、C组，均出现主动屈趾、屈肘功能。抓握力比较：合干法（B、E组）、分干法（C、F组）及传统法（A、D、G组）的差异均有统计学意义（P〈0．05）。术后3、6个月合干、分干法与传统法比较差异无统计学意义（P〉0．05）。梳洗试验出现时间：合干、分干法及传统法比较差异无统计学意义（P〉0．05）。结论颈，神经根能提供足够的神经再生纤维，可同时恢复2条神经功能。     

Repair of the main nerve trunk of the upper limb with end-to-side neurorrhaphy: an experimental study in rabbits

The aim of this study was to assess the effectiveness of reinnervation using end-to-side neurorrhaphy in the upper extremity of the rabbit. The cut right ulnar nerve was repaired and sutured to the side of the median nerve about 3 cm above the elbow joint. The extent of reinnervation was quantitatively evaluated, as well as the integrity of the intact donor nerve in 36 rabbits randomly treated with fresh or delayed nerve repair with or without perineurotomy. Evaluations included nerve conduction velocity (NCV) of both the ulnar and medial nerves, dry muscle weight, and histologic examination (neurofilament stain and morphometric assessment) at 3 and 6 months postoperatively. NCV recovery rates were 79% and 87% for the ulnar nerve, and 89% and 94% for the median nerve compared to contralateral intact nerves, at 3 and 6 months, respectively. Flexor carpi ulnaris muscle mass measurements revealed a recovery in dry muscle weight of about 81% and 88% at 3 and 6 months, respectively, compared to the intact contralateral flexor carpi ulnaris. Histologic studies with neurofilament staining reveal numerous axonal sprouts at the distal end of the median nerve, indicative of myelinated axonal regeneration. Morphometric analysis demonstrated no difference between fresh and delayed repairs. These results indicate that in the upper extremity of rabbits, end-to-side neurorrhaphy permits axonal regeneration from the intact donor nerve, and is associated with satisfactory recovery. The effect of the procedure on the donor nerve was negligible.     

Reorganization in motor cortex after brachial plexus avulsion injury and repair with the contralateral C7 root transfer in rats

The purpose of our study was to establish the profile of cortical reorganization in whole BPAI on rats and evaluate changes of cortical reorganization after repair of the median nerve with the contralateral C7 root transfer. Forty adult SD rats underwent whole roots avulsion of left brachial plexus, among them 20 received contralateral C7 root transfer to the injured median nerve. Intracortical microstimulation was performed in primary motor cortex (M1) at intervals of 3, 5, 7, and 10 months, postoperatively. The maps of motor cortical responses were constructed. Five normal rats were used as the control. Results showed that stimulating right M1 elicited motion of left vibrissae, submaxilla, neck, back, and left hindlimb after left BPAI, among them neck representation area replaced the forelimb area throughout the reorganization process. The left forelimb representation area was found in the left motor cortex 5 months after the contralateral C7 root transfer and existed in both motor cortexes at 7th postoperative month. The left forelimb representation area was detected only in right motor cortex at 10th month, postoperatively. In conclusions, after the contralateral C7 root transfer for repair of the median nerve in BPAI, the cortical reorganization occurred in a time‐dependent reorganization. The findings from this study demonstrate that brain involves in the functional recovery after BPAI and repair with nerve transfer and suggest that efforts to improve the results from nerve repair should address the peripheral nerve as well as the brain. © 2010 Wiley‐Liss, Inc. Microsurgery 2010.     

阻断部分臂丛神经下干分支对健侧颈7移位下干后神经再生的影响

目的 以大鼠健侧颈7直接修复臂丛神经下干为模型,探讨阻断下干分支前后,尺神经和正中神经神经纤维数量和质量的变化.方法 雌性SD大鼠40只,随机分成4组.A组:健侧颈7直接修复下干,并从下干发出处阻断下干后股、胸前内侧神经、前臂内侧皮神经;B组:健侧颈7直接修复下干,并从下干发出处以远1 cm处阻断下干后股、胸前内侧神经、前臂内侧皮神经;C组:健侧颈7直接修复下干,并从下干发出处切断后股;D组:对照组.术后比较尺神经、正中神经、胸前内侧神经和前臂内侧皮神经的神经纤维数量、神经纤维密度(p)、神经纤维数占下干神经纤维总数百分比、神经纤维直径、有髓神经纤维面积与相应分支神经总面积比(N Ratio).结果 尺神经和正中神经中,神经纤维数量、神经纤维密度、正中神经与尺神经分别占下干神经纤维百分比、神经纤维直径、不同直径神经纤维百分比、N Ratio,A、B、C三组间差异均无统计学意义.前臂内侧皮神经和胸前内侧神经中,上述各检测指标B、C组间均无明显差异.结论 健侧颈7直接移位下干后,在根部及根部以远1 cm处阻断胸前内侧神经及前臂内侧皮神经后,对尺神经、正中神经、前臂内侧皮神经残端和胸前内侧神经残端中神经纤维的数量和质量无明显影响.

Abstract：

Objective To explore the changes of the nerve fibers from median and ulnar nerves after cutting the branches of lower trunk which was repaired by the contralateral C7.Methods Forty female SD rats were divided into A, B, C and D groups randomly.In group A,the contralateral C7 root was transferred to lower trunk directly, and the posterior division of lower trunk, medial anterior thoracic nerve and the medial antebrachial cutaneous nerve were severed at the beginning of them;In group B, the contralateral C7 root was trarsferred to lower trunk directly, and the posterior division of lower trunk, medial anterior thoracic nerve and the medial antebrachial cutaneous nerve were severed at the point which was 1 cm away from the beginning of above branches;In group C, the contralateral C7 root was transferred to lower trunk directly, and the posterior division of lower trunk was severed at the beginning of it;In group D, control group.After the operation, myelinated fiber count, nerve fiber density, the percentage of the number of nerve fiber from branch accounting for that from lower trunk, nerve fiber diameter,the percentage of nerve fibers with different diameters and N Ratio were carried out to evaluate the outcome of each group.Results Myelinated fiber count, nerve fiber density, the percentage of the number of nerve fiber from branch accounting for that from lower trunk, nerve fiber diameter,the percentage of nerve fibers with different diameters and N Ratio in ulnar and median nerve, there were no difference between group A, group B and group C ( P ＞ 0.05).Conclusion After the medial anterior thoracic nerve and medial antebrachial cutaneous nerve, repaired by the contralateral C7, were severed at the beginning and at the point which was 1 cm away from the beginning of above branches, the changes of the quantity and quality of the nerve fibers from median and ulnar nerves were not significant.     

Long-term evaluation of rabbit peripheral nerve repair with end-to-side neurorrhaphy in rabbits

This study was designed to quantitatively assess long-term end-to-side neurorrhaphy in rabbits. The cut right ulnar nerve was repaired and sutured to the median nerve, in which a perineurial window was created in an end-to-side fashion 3 cm above the elbow joint. Both the extent of the reinnervation and the integrity of the intact donor nerve were evaluated in 36 rabbits randomly treated with fresh or delayed nerve repair. Evaluations included motor nerve conduction velocity (MNCV), dry muscle weight (DMW), and histological examinations at 9 and 12 months postoperatively. The recovery rates of MNCV were 90.1% and 92.8% for the ulnar nerve, and 95.7% and 96.8% for the median nerve, compared to intact contralateral nerves at 9 and 12 months, respectively. MNCV was not detectable for the ulnar nerve in control animals, while it was normal for the median nerve. Recoveries of flexor carpi ulnaris dry muscle weight of about 90.7% and 94.5% were observed at 9 and 12 months postoperatively, respectively. However, muscle mass measurements revealed a recovery of only 31.3% and 27% for control groups at 9 and 12 months postoperatively. The differences between experimental groups and control groups were statistically significant (P < 0.01). Neurofilament and silver stains showed numerous sprouting axons originating from the median nerve to the ulnar nerve. The results indicate that end-to-side neurorrhaphy could induce axonal sprouting from the main nerve trunk of upper limbs in rabbits, leading to useful functional recovery.     

成年大鼠健侧颈7移位术后跨大脑两半球功能重组的脑电生理研究

目的研究健侧颈7移位至患侧正中神经术后初级运动皮层跨大脑两半球功能重组的时程,初步探讨该重组的中枢机制。方法将45只SD雄性大鼠随机分为9组,即正常对照组(1个组),加左侧全臂丛根性撕脱模型和右侧(健侧)颈7移位模型两组在术后3个月、5个月、7个月、10个月共8个时间组,每组5只。采用运动皮层内微电极电刺激技术,定量评价成年大鼠患肢正中神经代表区在双侧初级运动皮层(初级运动皮层,MI)内的可塑性变化。结果在双侧MI电刺激:(1)正常对照组:一侧肢体的正中神经代表区只在其对侧MI出现。(2)左侧全臂丛根性撕脱模型:在术后3～10个月,患肢的正中神经代表区在双侧MI均能被诱发出来。(3)健侧颈7移位模型:术后3个月,患肢正中神经代表区在双侧MI均未出现。术后5个月,患肢正中神经代表区仅出现于患肢同侧MI。术后7个月,患肢正中神经代表区在双侧MI均出现。术后10个月,患肢正中神经代表区只出现于患肢对侧MI,代表区面积与正常对照无明显差异,且仍位于原前肢代表区。结论在健侧颈7移位成年大鼠模型上证实,在术后10个月初级运动皮层出现了跨大脑两半球的功能重组,并初步探讨了其可能的中枢机制。发现了成年哺乳动物周围神经解剖通路改变后发生跨大脑半球功能重组的脑电生理依据。