Interjoint coordination between the ankle and hip joints during quiet standing in individuals with motor incomplete spinal cord injury

Lee, Jae W.; Chan, Katherine; Unger, Janelle; Yoo, Jaeeun; Musselman, Kristin E.; Masani, Kei

doi:10.1152/jn.00302.2020

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…Thus, this device may be effective as one of the interventions that can be selected based on the patient’s condition. In addition, ankle joint function is closely related to standing balance [ 24 ], and improvement of ankle joint function can lead to more practical gait by improving balance during walking [ 25 ], and may have a spillover effect on ADL, such as allowing selection of a simpler lower limb orthosis in the future. In the future, the number and frequency of effective interventions should be examined.…”

Section: Discussionmentioning

confidence: 99%

Use of Robot-Assisted Ankle Training in a Patient with an Incomplete Spinal Cord Injury: A Case Report

Koseki

Takahashi

Yamamoto

et al. 2023

JFMK

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Rehabilitation interventions are crucial in promoting neuroplasticity after spinal cord injury (SCI). We provided rehabilitation with a single-joint hybrid assistive limb (HAL-SJ) ankle joint unit (HAL-T) in a patient with incomplete SCI. The patient had incomplete paraplegia and SCI (neurological injury height: L1, ASIA Impairment Scale: C, ASIA motor score (R/L) L4:0/0, S1:1/0) following a rupture fracture of the first lumbar vertebra. The HAL-T consisted of a combination of ankle plantar dorsiflexion exercises in the sitting position, knee flexion, and extension exercises in the standing position, and stepping exercises in the standing position with HAL assistance. The plantar dorsiflexion angles of the left and right ankle joints and electromyograms of the tibialis anterior and gastrocnemius muscles were measured and compared using a three-dimensional motion analyzer and surface electromyography before and after HAL-T intervention. Phasic electromyographic activity was developed in the left tibialis anterior muscle during plantar dorsiflexion of the ankle joint after the intervention. No changes were observed in the left and right ankle joint angles. We experienced a case in which intervention using HAL-SJ induced muscle potentials in a patient with a spinal cord injury who was unable to perform voluntary ankle movements due to severe motor–sensory dysfunction.

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Section: Discussionmentioning

confidence: 99%

Use of Robot-Assisted Ankle Training in a Patient with an Incomplete Spinal Cord Injury: A Case Report

Koseki

Takahashi

Yamamoto

et al. 2023

JFMK

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“…During quiet standing, subjects with incomplete SCI showed larger postural sway than did able-bodied subjects, primarily due to larger ankle-joint acceleration. Also, while in ablebodied subjects the ankle-and hip-joint accelerations were in anti-phase to minimize the postural sway, this interjoint coordination was not affected in SCI patients, which could therefore not help reduce the large center-of-mass (COM) accelerations (Lee et al 2021).…”

Section: Quiet Standing and Sitting In Humans With Sci And Strokementioning

confidence: 99%

Plastic Spinal Motor Circuits in Health and Disease

Windhorst¹,

Dibaj²

2022

Preprint

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In former times, the spinal cord was considered a hard-wired network for spinal reflexes and a conduit for long-range connections. This view has changed dramatically over the past few decades. It is now recognized as a plastic device whose structures and functions adapt to changing circumstances. While such changes also occur under physiological conditions, the most dramatic alterations take place during or after various pathological events. It is astonishing what mechanisms the musculo-skeletal system has evolved to come to grips with the damages. Many of these changes are maladaptive, but some appear to help adapt to the new conditions. Although myriads of studies, using manifold methods, have been devoted to elucidating the underlying mechanisms, in humans and animal models, the etiology and pathophysiology of various diseases are still little understood, due to a number of reasons. We will here try to summarize some results and remaining problems in a selection of diseases, in particular spinal muscular atrophy (SMA), amyotrophic laterals sclerosis (ALS), and predominantly spinal cord injury (SCI) with occasional relations to stroke. Especially the changes in SCI (and stroke) depend on the cause, site and extent of the afflicted damage and are therefore multifarious. At the end, we will briefly summarize results indicating that operant, classical and instrumental conditioning can be used to produce plastic changes in healthy people, with potentials for applications to patients with spinal cord injury. In order not to overload the article, we will not delve deeply into sub-cellular processes.

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“…The variances in angular displacements are coordinated to suppress the center of mass (COM) displacement in the sagittal plane. Investigation using a simpler double-inverted pendulum model with ankle and hip joints [9][10][11] exhibited anti-phasing coupling between the upper and lower segments. When the upper segment moves anteriorly, the lower segment moves posteriorly, and vice versa.…”

Section: Introductionmentioning

confidence: 99%

Age-Related Changes in Inter-Joint Interactions for Global and Local Kinematics While Standing

Fujio,

Takeuchi

2023

IEEE Trans. Neural Syst. Rehabil. Eng.

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Inter-joint interactions are involved in human standing. These interactions work not only for global kinematics that control the center of mass (COM) of the entire body, but also for local kinematics that control joint angular movements. Age-related changes in these interactions are thought to cause unstable standing postures in older people. Interactions of global kinematics are known to be deficient owing to aging. However, it is unclear whether the interaction of local kinematics is affected by aging. We investigated the age-related changes in inter-joint interactions, especially local kinematics, during standing. Differences were investigated in these two inter-joint interactions between older and younger adults in three different postures: normal, eyesclosed, and foam-surface standings. The inter-joint interaction for local kinematics was computed using the induced-acceleration analysis with a double-inverted pendulum model and quantified using an uncontrolled manifold approach. Consistent with previous studies, the inter-joint interaction for COM acceleration (global kinematics) deteriorated in older adults. In contrast, the interactions for angular accelerations in the ankle and hip joints (local kinematics) were slightly better in the older adults. Moreover, the individual components of angular acceleration which were induced by net torques from homonymous and remote joints were significantly increased in older adults. Thus, global and local inter-joint interactions are driven by distinct neural mechanisms and the interaction of local kinematics can compensate for the increment of each component of joint angular acceleration in older adults.

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Interjoint coordination between the ankle and hip joints during quiet standing in individuals with motor incomplete spinal cord injury

Cited by 5 publications

References 29 publications

Use of Robot-Assisted Ankle Training in a Patient with an Incomplete Spinal Cord Injury: A Case Report

Use of Robot-Assisted Ankle Training in a Patient with an Incomplete Spinal Cord Injury: A Case Report

Plastic Spinal Motor Circuits in Health and Disease

Age-Related Changes in Inter-Joint Interactions for Global and Local Kinematics While Standing

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