Arthrogenic muscle response to a simulated ankle joint effusion

Palmieri, Riann M.; Ingersoll, C D; Hoffman, Mark A.; Cordova, Mitchell L.; Porter, David A.; Edwards, Jeffrey E.; Babington, J P.; Krause, B. Andrew; Stone, Marcus B.

doi:10.1136/bjsm.2002.001677

Cited by 76 publications

(64 citation statements)

References 22 publications

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“…Two EMG electrodes were adhered 1.75 cm apart on the greatest bulk of the FL, approximately 2 to 3 cm inferior to the fibular head (Figure). 28,29 The reference electrode was positioned on the medial malleolus of the nondominant leg. AcqKnowledge software (version 3.7.3; BIOPAC Systems, Inc) was used to visualize the EMG and force signal.…”

Section: Methodsmentioning

confidence: 99%

Chronic Ankle Instability and Corticomotor Excitability of the Fibularis Longus Muscle

Pietrosimone

Gribble

2012

Journal of Athletic Training

113

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Context: Neuromuscular deficits are common in people with chronic ankle instability (CAI). Corticomotor pathways are very influential in the production of voluntary muscle function, yet these pathways have not been evaluated in people with CAI.Objective: To determine if corticomotor excitability of the fibularis longus (FL) differs between individuals with unilateral CAI and matched control participants without CAI.Design: Case-control study. Setting: Laboratory.Patients or Other Participants: Ten people with CAI (4 men, 6 women; age ¼ 21.2 6 1.23 years, height ¼ 175.13 6 9.7 cm, mass ¼ 77.1 6 13.58 kg) and 10 people without CAI (4 men, 6 women; age ¼ 21.2 6 2.3 years; height ¼ 172.34 6 8.86 cm, mass ¼ 73.4 6 7.15 kg) volunteered for this study.Main Outcome Measure(s): Transcranial magnetic stimulation was performed over the motor cortex on neurons corresponding with the FL. All testing was performed with the participant in a seated position with a slightly flexed knee joint and the ankle secured in 108 of plantar flexion. The resting motor threshold (RMT), which was expressed as a percentage of 2 T, was considered the lowest amount of magnetic energy that would induce an FL motor evoked potential equal to or greater than 20 lV, as measured with surface electromyography, on 7 consecutive stimuli. In addition, the Functional Ankle Disability Index (FADI) and FADI Sport were used to assess self-reported function.Results: Higher RMTs were found in the injured and uninjured FL of the CAI group (60.8% 6 8.4% and 59.1% 6 8.99%, respectively) than the healthy group (52.8% 6 8.56% and 52% 6 7.0%, respectively; F 1,18 ¼ 4.92, P ¼ .04). No leg 3 group interactions (F 1,18 ¼ 0.1, P ¼ .76) or between-legs differences (F 1,18 ¼ 0.74, P ¼ .40) were found. A moderate negative correlation was found between RMT and FADI (r ¼ À0.4, P ¼ .04) and FADI Sport (r ¼ À0.44, P ¼ .03), suggesting that higher RMT is related to lower self-reported function.Conclusions: Higher bilateral RMTs may indicate deficits in FL corticomotor excitability in people with CAI. In addition, a moderate correlation between RMT and FADI suggests that cortical excitability deficits may be influential in altering function.Key Words: motor cortex, neuromuscular activity, muscles, transcranial magnetic stimulation Key PointsBilateral fibularis longus resting motor threshold was higher in participants with chronic ankle instability (CAI) than in participants without CAI. Increased resting motor threshold might indicate deficits in fibularis longus corticomotor excitability in people with CAI. Resting motor threshold and self-reported function were moderately correlated, suggesting deficits in corticomotor excitability might influence function.A nkle sprains are the most common injury in physically active people and account for approximately 23% 1 and 15% 2 of all injuries in high school and collegiate athletics, respectively. In addition, 628 000 ankle sprains are treated annually in emergency facilities within the United States, representing approximately 20% of...

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Section: Methodsmentioning

confidence: 99%

Chronic Ankle Instability and Corticomotor Excitability of the Fibularis Longus Muscle

Pietrosimone

Gribble

2012

Journal of Athletic Training

113

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“…20 Articular afferent input from the dense type-II and type-III mechanoreceptor innervation to the lateral ankle can elicit efferent responses, also called arthrogenic muscle inhibition, causing muscles surrounding that joint to be inhibited. 34,35 There is conflicting evidence of alterations in muscular responsiveness in both weight bearing and non-weight bearing proprioception, regardless of joint capsule involvement. One study suggests that proprioception was not affected by direct anesthesia blockade to the ankle joint ligaments.…”

Section: Discussionmentioning

confidence: 99%

The Impact of Chiropractic Manipulative Therapy on Chronic Recurrent Lateral Ankle Sprain Syndrome in Two Young Athletes

Gillman¹

2004

Journal of Chiropractic Medicine

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“…Such reflex motoneuron inhibition was generalized to explain muscle weakness and atrophy from all forms of joint damage (89) . Sensory facilitation may also contribute to increased muscle stiffness, at least as inferred from muscles around the ankle joint (90) .…”

Section: Lumbar Multifidus Type Specificity and Proprioceptive Functionmentioning

confidence: 99%

“…The multifidus is also considered to display arthrogenic muscle inhibition, which is attributed to damage in associated joint structures (89,90) . Such reflex motoneuron inhibition was generalized to explain muscle weakness and atrophy from all forms of joint damage (89) .…”

Section: Lumbar Multifidus Type Specificity and Proprioceptive Functionmentioning

confidence: 99%

Clinical, Biomechanical, and Physiological Translational Interpretations of Human Resting Myofascial Tone or Tension

Masi

Nair²,

Evans³

et al. 2010

IJTMB

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Methods: Biomechanical, clinical, and physiological studies were reviewed to interpret the passive stiffness properties of HRMT that help to stabilize various relaxed functions such as quiet balanced standing. Biomechanical analyses and experimental studies of the lumbar multifidus were reviewed to interpret its passive stiffness properties. The lumbar multifidus was illustrated as the major core stabilizing muscle of the spine, serving an important passive biomechanical role in the body.Results: Research into muscle physiology suggests that passive resting tension (CNS-independent) is generated in sarcomeres by the molecular elasticity of low-level cycling cross-bridges between the actomyosin filaments. In turn, tension is complexly transmitted to intimately enveloping fascial matrix fibrils and other molecular elements in connective tissue, which, collectively, constitute the myofascial unit. Postural myofascial tonus varies with age and sex. Also, individuals in the population are proposed to vary in a polymorphism of postural HRMT. A few people are expected to have outlier degrees of innate postural hypotonicity or hypertonicity. Such biomechanical variations likely predispose to greater risk of related musculoskeletal disorders, a situation that deserves greater attention in clinical practice and research. Axial myofascial hypertonicity was hypothesized to predispose to ankylosing spondylitis. This often-progressive deforming condition of vertebrae and sacroiliac joints is characterized by stiffness features and particular localization of bony lesions at entheseal sites. Such unique features imply concentrations and transmissions of excessive force, leading to tissue micro-injury and maladaptive repair reactions.Conclusions: The HRMT model is now expanded and translated for clinical relevance to therapists. Its passive role in helping to maintain balanced postures is supported by biomechanical principles of myofascial elasticity, tension, stress, stiffness, and tensegrity. Further research is needed to determine the molecular basis of HRMT in sarcomeres, the transmission of tension by the enveloping fascial elements, and the means by which the myofascia helps to maintain efficient passive postural balance in the body. Significant deficiencies or excesses of postural HRMT may predispose to symptomatic or pathologic musculoskeletal disorders whose mechanisms are currently unexplained.

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Arthrogenic muscle response to a simulated ankle joint effusion

Cited by 76 publications

References 22 publications

Chronic Ankle Instability and Corticomotor Excitability of the Fibularis Longus Muscle

Chronic Ankle Instability and Corticomotor Excitability of the Fibularis Longus Muscle

The Impact of Chiropractic Manipulative Therapy on Chronic Recurrent Lateral Ankle Sprain Syndrome in Two Young Athletes

Clinical, Biomechanical, and Physiological Translational Interpretations of Human Resting Myofascial Tone or Tension

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