脑卒中后重度上肢功能障碍的康复评估与治疗

刘庆芝 ,  徐海东 ,  田婧 ,  李响 ,  王鹤玮

康复学报 ›› 2026, Vol. 36 ›› Issue (04) : 275 -284.

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康复学报 ›› 2026, Vol. 36 ›› Issue (04) : 275 -284. DOI: 10.3724/SP.J.1329.2026.04008
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脑卒中后重度上肢功能障碍的康复评估与治疗

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The rehabilitation assessment and treatment of severe upper limb impairment after stroke

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摘要

脑卒中后重度上肢功能障碍是临床康复领域中的一个复杂且亟待解决的问题。其康复过程面临诸多挑战,包括评估标准不够明确、神经重塑机制尚未完全阐明以及常规康复手段存在显著瓶颈等。本文首先通过量表评分、经颅磁刺激(TMS)评定、弥散张量成像(DTI)和功能性磁共振成像(fMRI)分析,探讨了重度上肢功能障碍的界定标准。系统性梳理了脑卒中后重度上肢功能康复所涉及的复杂且多层次的神经生物学机制,重点分析了神经系统的可塑性和修复能力。针对患者缺乏主动训练能力、痉挛与异常运动模式、心肺适能下降及神经可塑性窗口期限制等问题,阐述了“零功能门槛”技术、全面痉挛管理策略、综合体能恢复方案以及窗口前移与分级干预策略的应用价值。强调早期干预、个体化治疗和多技术联合应用的重要性,为突破重度上肢功能障碍康复过程中的“平台期”提供了理论支持与实践指导。

Abstract

Severe upper limb impairment after stroke represents a complex and pressing issue within the domain of clinical rehabilitation. The rehabilitation process encounters a multitude of challenges,such as ambiguous assessment criteria,an incomplete understanding of neural remodeling mechanisms,and substantial bottlenecks in traditional rehabilitation methods. This review article commences by deliberating on the definition criteria for severe upper limb dysfunction via scale scoring,transcranial magnetic stimulation (TMS) assessment,diffusion tensor imaging (DTI),and functional magnetic resonance imaging (fMRI) analysis. We systematically review the intricate and multi-layered neurobiological mechanisms associated with the rehabilitation of severe upper limb impairment after stroke,with a particular emphasis on analyzing the plasticity and repair capabilities of the nervous system. Addressing problems like the lack of active training ability,spasticity and abnormal movement patterns,poor physical fitness,and restricted windows of neural plasticity,this review elaborates on the application value of "zero-function threshold" technology,multidimensional spasticity management strategies,recovery programs for cardiopulmonary fitness and physical reserve,as well as window advancement and graded intervention strategies. It underscores the significance of early intervention,individualized treatment,and the combined application of multiple technologies,offering theoretical support and practical guidance for surmounting the "plateau phase" in the rehabilitation process of severe upper limb impairment.

关键词

脑卒中 / 重度上肢功能障碍 / 新技术 / 康复策略 / 评估

Key words

stroke / severe upper limb impairment / novel technologies / rehabilitation strategies / assessment

引用本文

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刘庆芝,徐海东,田婧,李响,王鹤玮. 脑卒中后重度上肢功能障碍的康复评估与治疗[J]. 康复学报, 2026, 36(04): 275-284 DOI:10.3724/SP.J.1329.2026.04008

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脑卒中是一种高致残率神经系统疾病,脑卒中后运动功能障碍显著降低了患者的生活质量。据统计我国每年新增约394万例脑卒中患者,患病总人数超过2 800万人1。其中,超过50%患者存在上肢功能障碍,重度上肢功能障碍患者其手部精细运动功能的丧失与上肢粗大运动功能的缺损交织存在,严重影响日常生活能力,并导致长期预后不佳2。尽管常规康复手段对脑卒中后轻、中度上肢功能障碍患者疗效较好,但是对重度上肢功能障碍患者的作用有限,其上肢功能康复常停滞于“平台期”3。此外,现有评估体系因“地板效应”难以准确区分重度患者在低分段的表现差异。更为重要的是,学界针对脑卒中后重度上肢功能障碍的恢复规律及神经重塑机制的研究较为缺乏,且尚未构建起统一的恢复理论或模型,这为制定有效的康复策略带来了挑战。本文聚焦于脑卒中后重度上肢功能障碍,明确“重度”的界定标准,探讨重度上肢功能障碍的神经修复机制,剖析现有康复治疗的局限性和改进方向,并讨论新技术在临床实践中的应用潜力。

1 脑卒中后重度上肢功能障碍的界定标准

脑卒中后上肢功能障碍的严重程度划分是制定康复方案和判断预后的重要依据。目前,临床和科研中常用的功能性量表、神经电生理检测及神经影像指标等多种工具被用于划分其严重程度。然而,由于样本量有限、患者群体的异质性较高以及纵向随访数据不足等因素,尚未就脑卒中后上肢功能障碍的严重程度划分形成统一的标准。鉴于此,本节将对现有文献中的相关资料进行系统梳理与深入分析,旨在厘清当前界定标准的多样性及其局限性,为临床评估提供参考依据。

1.1 基于量表评分的界定标准

功能性量表是临床常用的评估工具,能够在一定程度上量化脑卒中患者的上肢运动功能水平。不同量表通常涉及上肢运动功能的不同维度,包括上肢粗大运动、精细运动、痉挛程度及日常生活表现等。因此,对于重度障碍的划分标准各有差异。

Fugl-Meyer上肢运动功能评定量表(Fugl-Meyer Assessment of Upper Extremity,FMA-UE)由瑞典学者Fugl-Meyer于1975年设计,用于评估脑卒中患者的上肢运动功能恢复情况,是许多临床研究的主要评价指标,被视为“金标准”4。FMA-UE包含33个项目,总分0~66分,分数越高表示功能越好。其中,肩-上肢部分0~36分,腕-手部分0~24分,协调/速度0~6分。重度上肢功能障碍界定标准为总分<31分,提示患者可以在屈肌或伸肌协同模式下完成少量关节动作(如肘部屈曲伴肩内收),但动作僵硬且不协调。此外,腕手部功能相对缺失,无法独立于协同模式活动,即使存在轻微抓握,也无法自主松开手指5

上肢动作研究量表(Action Research Arm Test,ARAT)量表是Lyle于1981年基于Carroll教授开发的上肢功能测试(upper extremity function test,UEFT)量表简化而成的脑卒中上肢运动功能标准化评测工具,主要测试上肢在实际动作任务中的表现,可有效反映手部精细动作与粗大运动的协调能力6。ARAT共19个条目,包括4个子项目:抓(grasp)、握(grip)、捏(pinch)及粗大运动(gross movement),总分0~57分。总分<15分为重度上肢功能障碍,患者仅能完成肩部的粗大运动,抓握和捏取功能显著受限7

除上述2种量表,还存在其他重度上肢功能障碍的界定标准。例如:徒手肌力测试<3级,表明上肢无法抗重力活动;Brunnstrom分期Ⅰ~Ⅲ期,提示上肢弛缓性瘫痪、痉挛伴联合反应或共同运动,但动作僵硬且无关节分离活动;Chedoke-McMaster 卒中评估法(手臂部分)<4期,表明上肢痉挛明显,屈伸肌协同运动可自主诱发但动作僵硬,患者无法完成特定抗重力动作8。尽管临床上有多种常用的脑卒中后上肢运动功能评估量表,但大多数缺乏明确的重度功能障碍界定标准,亟需相关临床研究填补这一空白。

1.2 基于经颅磁刺激评估的界定标准

经颅磁刺激(transcranial magnetic stimulation,TMS)可以利用脉冲磁场刺激大脑初级运动皮层(primary motor cortex,M1)的锥体神经元,并在靶肌肉记录运动诱发电位(motor evoked potential,MEP),通过不同的刺激范式可以量化脑卒中后皮质脊髓束(corticospinal tract,CST)的完整性和兴奋性、皮质内抑制/促进及跨半球相互作用9

TMS评定可以反映脑卒中患者运动功能损伤程度。重度上肢损伤患者患侧半球M1区通常无法诱发出对侧上肢靶肌肉的MEP,提示CST解剖或功能性断裂10。脑卒中早期(平均病程24 d)能检测到MEP的患者,其上肢功能和手指主动关节活动度显著高于MEP缺失的患者11。有研究通过TMS刺激健侧半球M1区,记录对侧上肢小指展肌MEP,发现60%的重度脑卒中患者发病48 h内中枢运动传导时间(central motor conduction time,CMCT)延长,而CMCT的持续延长提示上肢运动功能恢复不良12。患侧半球运动皮层图面积扩大提示皮层功能重组,可能与手功能的运动再学习相关13。MEP的潜伏期缩短提示神经传导速度改善,与上肢肌力和功能的改善有关14。对于偏瘫侧的近端肢体,MEP有时可通过健侧半球的刺激诱发,但其潜伏期通常长于非偏瘫侧,提示健侧半球代偿性支配作用伴随潜伏期延长15。在急性期和亚急性期,CST完整性指标(如MEP和运动阈值)与运动功能密切相关。超过3个月后,运动功能与皮质内兴奋性指标,如短间隔皮质内抑制(short-interval intracortical inhibition,SICI)、长间隔皮质内抑制(long-interval intracortical inhibition,LICI)以及皮质内易化(intracortical facilitation,ICF)的测量更相关,提示不同阶段依赖于不同的神经机制9。此外,健侧半球对患侧半球的跨半球抑制持续存在与重度脑卒中上肢功能障碍相关16

TMS评定还可以预测脑卒中上肢功能的恢复17。在脑卒中后3周能够成功诱发MEP的患者,几乎均会在6个月后展现出一定程度的手部运动功能恢复(高特异性)18-19。但MEP的敏感性较低(54%~57%)且受检测时间窗影响较大,并非所有最终恢复手部运动功能的患者都能被早期TMS检测识别18。MEP缺失则与较差的上肢功能预后相关,急性期MEP缺失的患者3个月后ARAT评分通常为5~13分,而能够诱发MEP的患者评分可达42~47分20。此外,短潜伏期传入抑制(short-latency afferent inhibition,SAI)反映感觉运动整合中胆碱能系统的调控,其抑制程度与6个月后运动功能恢复正相关21

1.3 基于磁共振成像影像标志物的界定标准

磁共振成像(magnetic resonance imaging,MRI)技术能够无创地反映脑卒中对大脑结构与功能的影响,具备高分辨率、较高特异性和多模态成像的优势22。其中,弥散张量成像(diffusion tensor imaging,DTI)可提供关于脑结构及其连接的详细信息23,而功能性磁共振成像(functional magnetic resonance imaging,fMRI)则可用于揭示静息状态或任务执行过程中皮层激活模式及脑区间功能连接(functional connectivity,FC)的特征24-25

1.3.1 基于DTI评价神经纤维束的完整性

在脑白质中,水分子沿神经纤维方向的扩散速度快于垂直方向,通过测量这种扩散的各向异性,DTI可以描绘大脑中神经纤维束的完整性26。最常用的DTI参数为各向异性分数(fractional anisotropy,FA),患侧半球CST的FA通常呈现降低趋势,以内囊后肢的FA值最具代表性,能反映CST的结构保留度。患侧和健侧半球FA的比值(ratio of fractional anisotropy,rFA)以及FA的不对称性指数(asymmetry of fractional anisotropy,aFA)是FA的重要衍生指标。一般而言,FA值与rFA值越低,aFA值越高,患者运动功能的受损程度越严重27。PUIG等28研究发现,脑卒中患者在病程1个月时的rFA与病程2年时的运动功能损伤程度显著相关,rFA值<0.689提示重度损伤,0.689~0.982则提示轻度到中度损伤,该方法具有较好的灵敏性和特异性。根据STINEAR等29提出的经典预测模型,联合急性期肩外展与手指伸展量表(Shoulder Abduction and Finger Extension,SAFE)评分(评估肩外展、手指伸展肌力之和),MEP(评估皮质脊髓束的功能完整性),以及内囊后肢FA(评估皮质脊髓束的结构完整性),可以预测慢性期的上肢功能恢复结局。

在脑卒中后重度上肢功能障碍患者中,胼胝体微结构可以作为功能损伤和修复的生物标志物,因为胼胝体可以实现健患侧半球间的沟通和代偿。HAYWARD等30发现脑卒中患者的CST白质纤维微结构与上肢运动障碍之间存在整体相关性。1项19例中重度慢性脑卒中患者的研究发现,患侧半球侧网状脊髓束的FA与上肢协同运动严重程度显著相关,而健侧半球侧红核脊髓束的FA与手部损伤严重程度显著相关,表明DTI可评估上肢运动相关神经纤维束的微观结构变化31。此外,丘脑梗死患者在发病后1周、4周、3个月和6个月的DTI检查显示,患侧与对侧丘脑辐射纤维的FA值逐渐增加,且与临床评分变化相关,表明神经纤维的增殖和重组可能促进神经功能恢复32。本课题组以胼胝体纤维束对应的左右大脑半球32对同源脑区为感兴趣区域,发现双侧感觉运动皮层间及健侧感觉运动皮层与患侧颞上回之间的FC与运动功能恢复显著相关,可作为慢性重度偏瘫脑卒中患者上肢运动功能恢复的预测指标23

1.3.2 基于fMRI的影像标志物分析

fMRI是神经影像技术的“金标准”,可实现局部血氧代谢的可视化,间接反映神经元活动,具备较高的空间分辨率、无创性和多模态优势33-34。静息态fMRI不依赖于患者的功能水平,可通过FC、有效连接及图论等方法反映脑网络特征35。既往研究发现,轻中度脑卒中患者的双侧同伦脑区,如双侧M1区的FC较健康对照组下降,但伴随上肢运动功能改善,双侧FC增强且呈正相关36。然而,本课题组前期通过静息态fMRI的FC、有效连接、低频振幅、独立成分分析等发现重度上肢功能障碍患者的脑重塑机制不同于轻、中度患者,表现为健侧半球运动前区、前额叶、顶下小叶和基底节核团的代偿,而非双侧FC增强37-40。任务态fMRI是研究特定脑区功能的有效工具,但其应用受限于患者的主动运动能力,难以用于重度患者。本课题组采用被动握拳任务fMRI范式,发现重度上肢功能障碍患者在运动想象训练后,双侧大脑半球的代偿性激活减弱,FC分析进一步定位了与运动功能重塑相关的多个脑区,包括初级感觉运动皮层、顶下小叶和壳核41。目前,fMRI研究主要描述重度患者的脑网络连接或激活模式,尚未明确重度界定标准。

2 脑卒中后重度上肢功能障碍康复的神经重塑机制

脑卒中后上肢功能的恢复涉及复杂且多层次的神经生物学机制,其核心在于神经系统的可塑性及修复能力。神经可塑性通过突触重塑、树突新生、轴突再生及皮层地图重构等过程实现功能代偿42。动物实验表明,脑卒中后3个月内突触可塑性最显著,病灶周围及远端脑区的突触数量增加,树突棘密度提升,促进新神经连接形成,这与临床早期快速恢复阶段一致43。神经营养因子和血管新生有助于神经元存活和突触形成,运动训练可上调脑源性神经营养因子(brain-derived neurotrophic factor,BDNF)表达,促进突触可塑性和神经干细胞增殖44。运动训练还可以增加脑血流量,促进侧支循环形成,并减少凋亡、自噬和焦亡相关蛋白表达45。缺血半暗带内血管新生可以改善局部血供,BDNF和血管内皮生长因子(vascular endothelial growth factor,VEGF)在此过程中起协同作用46。神经炎症反应具有双重作用,急性期加重损伤,恢复期则参与修复。M1型小胶质细胞释放促炎因子(如肿瘤坏死因子-α和白细胞介素-1β),M2型分泌抗炎因子(如白细胞介素-10),运动训练可抑制M1极化并促进M2型转化44。A1型星形胶质细胞释放神经毒性物质,A2型则清除代谢废物并分泌神经营养因子支持修复。因此,小胶质细胞和星形胶质细胞的极化状态是关键调节靶点47。此外,神经再生与神经干细胞密切相关,是脑卒中后神经功能修复的重要机制48

在宏观层面,脑卒中患者可通过皮层区功能重组和传导通路代偿等方式重建上肢运动功能。经典的“半球间抑制模型(interhemispheric inhibition,IHI)”指出,脑卒中后病灶侧与健侧半球之间存在抑制失衡。具体来说,病灶侧损伤减弱了对健侧半球的抑制,而健侧对患侧半球的过度抑制阻碍了功能恢复49。通过抑制健侧半球M1区或兴奋患侧半球M1区,可恢复半球间平衡,促进上肢功能恢复50。然而,该模型主要适用于损伤程度较轻的患者,而重度损伤患者的适应性相对较差。相比之下,“代偿模型(compensatory model)”强调激活健侧运动相关脑区来代偿患侧功能,一般适用CST受损严重的患者3950-51。DI PINO等9于2014年提出“双相平衡恢复模型(bimodal balance-recovery model)”,认为CST保留度较高时功能恢复依靠患侧运动皮层重组,保留度较低的则更多依赖健侧半球代偿。功能影像学研究进一步验证了该模型的可靠性,在高CST保留组中,偏侧指数可恢复至对侧主导状态,患侧M1区激活与Fugl-Meyer评分呈正相关;而在低CST保留组中,偏侧指数离散化,健侧背侧运动前区皮层(dorsal premotor cortex,PMd)激活与功能恢复显著相关52-53。此外,还需关注患者神经功能的动态重塑过程,急性期主要依赖代偿机制,而亚急性期则需根据CST恢复情况灵活调整干预策略9

3 脑卒中后重度上肢功能障碍康复治疗的局限性和应对策略

脑卒中后重度上肢功能障碍的康复治疗受到多种因素的限制,包括但不限于无法启动或维持主动运动训练,痉挛与异常运动模式影响运动能力,体能不足难以承受训练强度,以及神经可塑性的时间窗口限制。本节将系统分析这些问题,并提出解决方案,为相关研究和实践提供支持。

3.1 主动训练能力缺乏与康复技术适配性问题

美国心脏协会(American Heart Association,AHA)2016版《成人脑卒中康复与恢复指南》54指出,上肢功能康复训练应遵循如下原则:开展针对特定任务的功能性训练,内容需分级设计并逐步提升难度,通过反复练习巩固技能(Ⅰ级推荐,A类证据)。然而,重度上肢功能障碍患者缺乏主动训练能力,难以独立完成任务导向的训练。例如,强制性运动疗法(constraint-induced movement therapy,CIMT)虽为指南推荐的A类证据干预措施,但其准入条件较高(偏瘫侧腕关节伸展>20°,拇指及其他4指中的任意2指的掌指关节和指间关节伸展>10°,且上述动作1 min内可重复3次),仅有约25%的患者符合要求,即使采用最低标准(能够通过可控抓握动作从桌面上提起并放下1条抹布),CIMT仍主要适用于轻、中度损伤患者,重度患者被排除在外55

“零功能门槛”干预技术是解决上述局限性的关键方法。该技术针对功能完全丧失或接近失能的患者,无需依赖残存主动运动能力即可启动康复训练。其核心是通过外部辅助(如神经电刺激、机器人辅助或脑机接口)直接激活神经肌肉通路,打破“无功能无法训练”的壁垒,利用中枢可塑性在损伤早期介入,预防继发性功能退化,并为重度瘫痪患者提供神经重塑的机会。以下列举部分代表性技术:① 上肢康复机器人,在指南中的推荐级别为Ⅱa,证据等级A级。重力补偿型机器人外骨骼通过机械臂或弹簧系统抵消肢体重力,帮助中度上肢瘫痪患者在无自主肌力时完成关节活动训练。例如,ARMin系统利用动态重力支撑进行三维任务导向训练,并结合视觉反馈强化运动意图与动作的关联,有效提升中、重度患者FMA-UE评分,疗效优于常规康复训练56。然而,上肢康复机器人通常不适用于重度上肢痉挛,即改良阿什沃思量表(Modified Ashworth Scale,MAS)>3分的患者,且有证据提示上肢康复机器人对痉挛的缓解无明显的疗效57-58。部分上肢机器人通过内置的力学和运动学传感设备,能够精确测量患肢被动运动时的阻力变化,从而可用于脑卒中上肢痉挛的客观评定59-60。② 神经肌肉电刺激,适用于脑卒中后初期仅表现出轻微自主运动或存在肩关节半脱位的患者(推荐级别Ⅱa,证据等级A)。神经肌肉电刺激能激活α运动神经元,预防肌肉萎缩,并通过Ia类传入纤维增强感觉输入,是重度上肢功能障碍康复的常用手段61-62。③ 动作模拟类技术,包括运动想象(推荐级别Ⅱa,证据等级A)、动作观察及镜像疗法等,属于主动中枢干预技术,通过想象、视觉反馈等形式,在中枢层面调节运动神经网络。由于此类疗法不依赖外周肢体的功能状态,该类技术适用于重度患者63。本课题组前期研究显示,运动想象对重度脑卒中患者的上肢功能恢复有显著效果,其机制涉及健侧感觉运动皮层的代偿性激活及顶下小叶的参与64-65。④ 无创神经调控,属于被动中枢干预技术,通过调节大脑皮层或核团的兴奋性促进患者上肢功能恢复。常用技术包括重复经颅磁刺激(repetitive transcranial magnetic stimulation,rTMS)(高频兴奋、低频抑制)、经颅直流电刺激(阳极兴奋、阴极抑制)以及θ脉冲刺激(间歇性兴奋、连续性抑制)。根据《重复经颅磁刺激临床治疗循证指南(2014—2018年更新版)》,针对脑卒中后手功能障碍,亚急性期低频rTMS刺激健侧半球M1区为A级推荐,高频rTMS刺激患侧M1区为B级推荐,慢性期低频rTMS刺激健侧半球M1区为C级推荐66。针对重度上肢功能障碍患者,探寻M1区以外的靶点(如健侧PMd)及多靶点联合刺激策略成为研究热点5067。其他技术如迷走神经电刺激(植入或经耳)、经颅超声刺激、高精度直流电刺激、经颅交流电刺激、硬膜外刺激以及深部脑刺激等亦展现出巨大潜力,但其在重度脑卒中上肢康复中的应用仍需高质量随机对照试验验证68。为了进一步提升上述神经调控技术的精准度与临床疗效,基于多模态神经影像的个体化靶向刺激则是未来的发展方向69。⑤ 脑机接口(brain-computer interface,BCI)技术,通过强化“意图-动作”闭环,激活残留神经网络,促进突触可塑性和上肢功能恢复70。BCI系统常基于运动想象、稳态视觉诱发电位或P300,外周结合功能性电刺激、机器人外骨骼和虚拟现实设备等,构建中枢到外周的桥梁,适用于重度上肢功能障碍71-72。BIASIUCCI等73探讨了BCI联合功能性电刺激(functional electric stimulation,FES)治疗脑卒中后重度上肢功能障碍,结果与假FES相比,BCI联合FES能显著促进慢性期的运动功能恢复,效果持续6~12个月,并增强受损半球运动区的FC。国内研究发现,亚急性期重度患者接受基于运动想象的BCI疗法后,FMA-UE和ARAT评分提高,机制与躯体感觉、视觉、空间处理和运动学习的脑功能网络活动增强相关74。近10年BCI康复的可视化分析表明,中国在该领域领先但整体仍落后于美国,研究热点为上肢康复疗效及中枢机制,主要关注慢性期患者75。需要注意,BCI技术并非完全“零功能门槛”,对患者认知和运动想象能力有一定要求76。BCI也通常不适用于明显的上肢痉挛(MAS评分>2分)的患者,有研究表明脑卒中MAS<1级的患者在接受BCI手功能干预后其疗效显著优于MAS>1级的患者77-78。当前BCI技术还面临其他挑战,如解码精度不足、系统稳定性较弱、个体差异显著(重度患者激活阈值高,需模型优化)、成本高昂、操作便捷性不足等79

3.2 痉挛与异常运动模式的干扰

痉挛是脑卒中后上运动神经元损伤引发的运动障碍,表现为速度和肌肉长度依赖性的肌张力增高。其主要由过度激活的脑干下行兴奋性通路(如内侧网状脊髓束)引起,导致牵张反射亢进。痉挛与其他运动障碍(如异常力量控制、协同运动模式、拮抗肌共激活、关节挛缩)共享病理生理基础,属于适应不良性神经可塑性表现80。在重度上肢功能障碍患者中,痉挛及异常运动模式会干扰运动功能恢复,通常出现在急性期和亚急性期,并在慢性期趋于稳定。目前尚无完全纠正这种异常神经可塑性的干预措施。现有证据推荐肉毒毒素注射、苯酚神经阻滞和鞘内巴氯芬泵等方法,但其毒副作用及长期功能恢复疗效仍需进一步研究81。力学牵伸、冲击波疗法、矫形器或手术矫正可改善活动范围并减少挛缩82-83。电刺激训练拮抗肌(如手指伸肌)有助于平衡肌力84。重复性任务训练(如抓握-释放动作)可在痉挛减轻后重建正常运动模式。因此,应采用全面痉挛管理策略,整合药物注射、物理牵伸、电刺激、冲击波及任务导向训练等多模态、多学科干预,早期促进神经修复并抑制异常可塑性发展,慢性阶段则转向以功能恢复为目标,综合运用痉挛缓解、肌力强化和代偿策略8185

3.3 心肺适能不足

脑卒中患者的心肺适能(cardiorespiratory fitness,CRF)是指心肺系统在体力活动中为肌肉提供氧气和清除代谢废物的能力。这一指标直接影响患者的运动耐量、日常生活能力和康复效果,AHA建议将其作为第五大生命体征监测86。CRF的金标准是通过心肺运动测试评估最大或峰值耗氧量,脑卒中患者发病初期耗氧量显著下降,恢复期虽有所回升,但仍低于健康人群87。此外,心肺适能不足常与重度上肢功能障碍共存,限制了高强度训练,成为功能恢复的“短板”。为此,有学者提出综合体能恢复方案,以提升CRF为核心,整合有氧耐力训练、抗阻力量训练、平衡协调练习、呼吸肌训练、营养支持及神经调控等多模式实施渐进干预88。针对重度患者可采用低强度间歇式或适应性机器人辅助训练,积极开展早期干预,实施混合运动训练模式,并利用分阶段能量节约技术(如将每日训练分解为短时高密度任务)突破体能“短板”89-90。然而,该领域高质量研究仍显不足,特别是针对重度上肢功能障碍患者的循证依据匮乏,未来需进一步探索。

3.4 神经可塑性的时间依赖性及窗口期限制

脑卒中患者在慢性期(>6个月)的神经可塑性和上肢功能恢复速度显著下降,表现为运动功能改善幅度减少、对训练反应性降低。重度患者(伴有严重皮质脊髓束损伤)的FMA-UE评分年均改善幅度仅为亚急性期的10%~20%91。这可能与不可逆性神经解剖结构损伤、抑制性神经微环境的形成、神经营养因子分泌减少以及突触修剪与功能重组失衡等因素相关90-94。因此,上肢功能恢复的关键窗口期为发病后6个月内。然而,重度患者常因急性期并发症(如昏迷、感染、虚弱或认知心理障碍等)未能及时接受系统化康复干预,错失最佳恢复期。目前,临床早期关注重点多集中于下肢康复,导致上肢手功能康复干预滞后。实际上,上肢功能恢复的最佳窗口期为发病后3个月内,滞后干预可能错过神经可塑性的关键时期95。为此,应实施窗口前移与分级干预策略,其核心是基于CST保留度进行精准评估,将干预时间前移至发病后早期。对于CST保留度较高患者,在康复初期即开展上肢功能训练;而对于结构损伤较重患者,则尽早引入中枢-外周闭环调控技术激活残留神经网络,从而实现高保留即刻训练、低保留闭环激活的个性化分级方案。通过长期科学管理与干预,最终实现以回归家庭和社会为目标的功能性康复95-96

4 小 结

本文系统综述了脑卒中后重度上肢功能障碍的评估方法和界定标准、神经重塑机制及康复瓶颈的突破策略。重度损伤需结合功能量表、神经电生理和多模态影像标志物进行评估,核心标志物包括FMA-UE评分<31分与ARAT评分<15分、MEP缺失及内囊后肢FA值降低(aFA>0.15)。功能恢复的关键在于皮质脊髓束保留度与健侧半球代偿能力的动态平衡。现有康复手段面临主动功能缺失导致“训练悖论”、痉挛形成“神经可塑性陷阱”、心肺适能不足限制训练强度、慢性期神经微环境抑制突触再生这四大挑战。机器人辅助、闭环神经调控及脑机接口等技术通过中枢-外周双向干预,为突破瓶颈提供了新路径。

然而,当前研究存在以下局限:① 重度患者评估标准不统一,传统量表难以捕捉微小改善,DTI与fMRI影像标志物缺乏标准参考模型;② 神经调控的靶点选择、刺激参数及长期疗效需进一步验证;③ 脑机接口技术的临床转化受限于解码效率低、运动意图-动作闭环延迟、个性化算法不足及作用机制不明;④ 痉挛管理长效性不足,肉毒毒素平均有效期仅3~6个月且可能抑制神经修复。

未来研究应聚焦多学科交叉,开发基于人工智能的多模态评估模型,结合功能评分、神经电生理、多模态影像和可穿戴传感器建立个性化功能监测系统;推动神经调控精准化,实现个体化靶向调控;研发适用于重度患者的混合BCI系统,强化运动意图-动作关联;建立转化平台,制定康复技术评估标准,推动三级康复技术推广和标准化建设。总之,通过多学科融合与技术创新,有望突破脑卒中后重度上肢功能障碍的康复瓶颈,实现从神经修复到功能重建的跨越式发展。

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基金资助

国家自然科学基金青年科学基金项目(82102665)

山东省医药卫生科技项目(202416010199)

上海市科学技术委员会“扬帆计划”项目(21Y1404600)

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