Research Article: The characteristics of EEG power spectra changes after ACL rupture

Date Published: February 9, 2017

Publisher: Public Library of Science

Author(s): Xin Miao, Hongshi Huang, Xiaoqing Hu, Dai Li, Yuanyuan Yu, Yingfang Ao, Chunfeng Zhao.

http://doi.org/10.1371/journal.pone.0170455

Abstract

Reestablishing knee stability is the core of the treatment of ACL (Anterior Cruciate Ligament) injury. Some patients still have a feeling of instability of the knee after ACL injury treatment. This unstable feeling may be caused by central nervous system changes after ACL rupture.

To identify the central changes after ACL rupture, EEG spectra were recorded to compare ACL patients and healthy controls when they were walking, jogging, and landing.

There was a significant increase in delta, theta, alpha and beta band power during walking, jogging and landing in ACL patients. We also found an asymmetry phenomenon of EEG only in the ACL patients, mainly in the frontal area and central-parietal area. The asymmetry of beta band power extended to the frontal and the central area during jogging and landing task.

There were significant differences in EEG power spectra between the ACL patients and healthy people. ACL patients showed high EEG band power activities and an asymmetry phenomenon. EEG power changes were affected by movements, the asymmetry extended when performing more complicated movements.

Partial Text

Anterior cruciate ligament (ACL) rupture is one of the most common sport injuries. The high cost of ACL injury treatment, the long duration of recovery and the physical functional limitation after surgery are serious medical care problems. The ACL is one of the important structures of the knee joint in maintaining joint stability. After the ligament ruptures, the tibia is no longer restricted in its forward movement. This instability of the knee joint will cause meniscus injury, cartilage degeneration and other tissue damage, even osteoarthritis [1, 2]. Restoring knee joint stability is the key issue of ACL injury. At present, although arthroscopy of ACL reconstruction has satisfactory clinical effects [3, 4], some patients still feel unstable, even after surgery and physiotherapy [5–7].

There were significant differences in EEG power spectra between the ACL patients and healthy people. ACL patients showed high EEG band power activities and asymmetry. Additionally, EEG power changes were affected by movements, the asymmetry extended when performing more complicated movements.

 

Source:

http://doi.org/10.1371/journal.pone.0170455

 

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