中国神经再生研究(英文版) ›› 2018, Vol. 13 ›› Issue (4): 704-708.doi: 10.4103/1673-5374.230298

• 原著:周围神经损伤修复保护与再生 • 上一篇    下一篇

正中神经损伤过程中可出现大脑皮质重塑

  

  • 收稿日期:2017-11-07 出版日期:2018-04-15 发布日期:2018-04-15
  • 基金资助:

    国家自然科学基金资助(81371965,81672144);上海市浦江计划(16PJD035.s)

Brain remodeling after chronic median nerve compression in a rat model

Bing-Bo Bao1, Dan-Qian Qu2, Hong-Yi Zhu1, Tao Gao1, Xian-You Zheng 1   

  1. 1 Department of Orthopedic Surgery, Shanghai Jiao Tong University, Affiliated Sixth People’s Hospital, Shanghai, China
    2 Yueyang Hospital of Intergrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai,China
  • Received:2017-11-07 Online:2018-04-15 Published:2018-04-15
  • Contact: Xian-You Zheng, M.D.,zhengxianyou@126.com
  • Supported by:

    This work was supported by the National Natural Science Foundation of China, No. 81371965, 81672144; a grant from the Shanghai Pujiang Program of China, No. 16PJD035.

摘要:

腕管综合征是临床上常见的周围神经卡压性疾病,会出现感觉运动功能障碍。有研究者提出,腕管综合征患者周围神经损伤过程中出现的功能核磁共振不规则传入信号会产生中枢神经可塑性变化现象。然而,临床上很难获得患者脑部多点神经影像学数据。实验通过显微缝线结扎正中神经的方法方法建立大鼠正中神经卡压模型,即腕管综合征模型,并应用功能磁共振检测正常大鼠与腕管综合征模型大鼠术后2周,2个月的大脑感觉皮质重塑过程。发现在正常大鼠中,当给予前爪电刺激(30 s刺激1次,休息30 s,反复3次)时其对侧大脑感觉运动皮质区可明显激活。然而,对腕管综合征模型大鼠给予上述相同的电刺激时,在早期(术后2周)对侧大脑半球可出现明显的脑功能区激活,包括初级运动皮质、小脑和丘脑区域;而在后期(术后2个月)这些脑功能区激活不明显。上述数据结果证明了在大鼠正中神经卡压后2周及2个月,大脑皮质区出现了明显的重塑过程。

orcid:0000-0002-9770-5394(Xian-You Zheng)

 

关键词: 周围神经损伤, 腕管综合征, 功能磁共振, 重塑, 慢性神经卡压, 皮质重组, 感觉运动功能, 大脑, 神经再生

Abstract:

Carpal tunnel syndrome is the most common compressive neuropathy, presenting with sensorimotor dysfunction. In carpal tunnel syndrome patients, irregular afferent signals on functional magnetic resonance imaging are associated with changes in neural plasticity during peripheral nerve injury. However, it is difficult to obtain multi-point neuroimaging data of the brain in the clinic. In the present study, a rat model of median nerve compression was established by median nerve ligation, i.e., carpal tunnel syndrome model. Sensory cortex remodeling was determined by functional magnetic resonance imaging between normal rats and carpal tunnel syndrome models at 2 weeks and 2 months after operation. Stimulation of bilateral paws by electricity for 30 seconds, alternating with 30 seconds of rest period (repeatedly 3 times), resulted in activation of the contralateral sensorimotor cortex in normal rats. When carpal tunnel syndrome rats received this stimulation, the contralateral cerebral hemisphere was markedly activated at 2 weeks after operation, including the primary motor cortex, cerebellum, and thalamus. Moreover, this activation was not visible at 2 months after operation. These findings suggest that significant remodeling of the cerebral cortex appears at 2 weeks and 2 months after median nerve compression.

Key words: nerve regeneration, peripheral nerve injury, carpal tunnel syndrome, functional magnetic resonance imaging, remodeling, chronic nerve compression, cortical reorganization, sensorimotor function, brain, neural regeneration