The physiology of mechanoreceptors in the anterior cruciate ligament. An experimental study in decerebrate-spinalised animals

Miyatsu, M.; Atsuta, Yuji; Watakabe, Makoto

doi:10.1302/0301-620x.75b4.8331126

Cited by 67 publications

(44 citation statements)

References 20 publications

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“…However, when the ligament was transected and anterior instability was present, a significant increase in the MAN activation was observed at 30" and 90°, suggesting that the medial meniscus and other medially innervated structures may be overloaded, thus producing more medial information. Although PAN activity is present in our study in the normal knee, as found by Miyatsu et al (1993), MAN activity is also present and appears to be significantly more important when the ligament is damaged.…”

Section: Discussionsupporting

confidence: 52%

“…Our experimental model was designed to study knee proprioception and its reaction to passive motion and passive stress with or without the anterior cruciate ligament, in the anesthetized cat. Decerebrate animals have been used to determine motor neuron output in various studies (Ekholm et al 1960, Miyatsu et al 1993). A better detection of motor unit discharges is the reason for using experimental decerebration.…”

Section: Discussionmentioning

confidence: 99%

“…They concluded that ligament overload may contribute to functional stability of the knee joint by the regulation of periarticular muscle contraction. Further experiments by Miyatsu et al (1993) showed discharges at the PAN, and muscle motor unit activity, not only in the hamstring but also in the quadriceps muscle, after axially stretching the anterior cruciate ligament with physiologic loads (between 1% and 10% of the ligament's maximum tensile strength). These results suggested that the anterior cruciate-muscle reflex may play a physiologic role during knee function.…”

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confidence: 98%

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Neural and muscular electric activity in the cat's knee: Changes when the anterior cruciate ligament is transected

Gómez‐Barrena

Núñez

Martinez-Moreno

et al. 1997

Acta Orthopaedica Scandinavica

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Section: Discussionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 99%

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confidence: 98%

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Neural and muscular electric activity in the cat's knee: Changes when the anterior cruciate ligament is transected

Gómez‐Barrena

Núñez

Martinez-Moreno

et al. 1997

Acta Orthopaedica Scandinavica

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“…The mechanoreceptors in the cruciate ligaments are believed to be involved in controlling the muscles acting on the knee joint [13,16,19,21,23,. Either a direct effect of the mechanoreceptors 011 the muscles via the amotoiieurons [2 1,291 or a n indirect effect on the muscles and muscle stiffness via the y-motoneurons in the musclespindle system has been proposed [ 14,15,29].…”

Section: Introductionmentioning

confidence: 99%

Muscle reflexes during gait elicited by electrical stimulation of the posterior cruciate ligament in humans

Fischer-Rasmussen

Krogsgaard

Jensen

et al. 2002

Journal Orthopaedic Research

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We investigated the influence of electrical stiinulation of the posterior cruciate ligament (PCL) on the niotoneuron pool of the thigh and calf muscle during gait. The study group comprised eight young men without any history of injury to tlie knee joints. Multistranded teflon-insulated stainless steel wires were inserted into the PCL guided by sonography and in four subjects also into tlie fat pad of the knee. The PCL was electrically stimulated during gait on a treadmill at heel strike and 100 ms after heel strike. Electroinyographic signals were recorded with bipolar surface electrodes placed over the vastus medialis, rectus femoris, vastus lateralis, biceps feinoris caput longum, and semitendinosus muscles. The stimuli consisted of four pulses delivered at 200 Hz; the stimulus amplitude was two to three times the sensory threshold. The electrical stimulation of the PCL inhibited the ongoing muscle activity in both the quadriceps and the hamstrings. The latency of the inhibition ranged between 78 and 148 ins in the quadriceps, between 88 and 110 ins in the hamstrings and between 189 and 258 ms in m. gastrocnemius. Stimulation of the fat pad of the knee did not influence the thigh and calf muscle motoneuron pool as evidenced by electroniyography. The response elicited from the stimulation of the PCL was not limited to a specific muscle group but depended on ongoing muscle contraction, which suggests that the mechanoreceptors in the PCL are involved in the control of all muscles acting on the knee joint during gait. 0 7002 Orthopaedic Research Society. Published by

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“…22. '~~J134 and clinic-investigations.30.MMJ77J9 Afferent input from ACL mechanoreceptors reportedly alters the gamma muscle spindle activity of the calf and knee flexor muscles in the cat, serving a vital function in postural tone regulati~n.'~."…”

mentioning

confidence: 99%

Effects of a 2-Hour Cheerleading Practice on Dynamic Postural Stability, Knee Laxity, and Hamstring Extensibility

Rowe¹,

Wright²,

Nyland³

et al. 1999

J Orthop Sports Phys Ther

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Study Desig One group; pretest, posttest design. Objective: To assess the effect of a 2-hour cheerleading practice on the anterior knee laxity, hamstring extensibility, and dynamic postural stability (preferred stance leg during visiondenied unilateral stance) of 17 nonimpaired members of a college cheerleading team (8 females, 9 males; 18-25 years old). Background: Anterior knee laxity and hamstring extensibility increase following exercise. The relationship between exercise induced anterior knee laxity, hamstring extensibility, and dynamic postural stability, however, has not been examined. Methods and Measures: Pre-and postpractice measurements were compared using paired t tests and Bonferroni's correction for multiple comparisons. A 3 X 2 analysis of variance (force level applied to the arthrometer by condition) and Tukey honest significant difference post hoc test were used to evaluate specific arthrometer force level by condition effects (P < .05).Results: Mean laxity at 133 N and hamstring extensibility increased (mean 2 SD) 1.5 2 1 mm and 3 2 4O, respectively, following practice. Mean medial-lateral stabiliometer platform angulation (frontal plane position) moved medially following practice (2.9 2 3%nd produced a weak correlation with increased knee laxity (r = 0.58). Hamstring extensibility did not significantly relate to stabiliometry or knee laxity variables. Conclusions:The relationship between the medially directed platform angulation and the increase in anterior knee laxity following cheerleading practice suggests a relationship between subtalar joint position and anterior cruciate ligament strain. I Orthop Sports Phys Ther I999;29:455-4l62.

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The physiology of mechanoreceptors in the anterior cruciate ligament. An experimental study in decerebrate-spinalised animals

Cited by 67 publications

References 20 publications

Neural and muscular electric activity in the cat's knee: Changes when the anterior cruciate ligament is transected

Neural and muscular electric activity in the cat's knee: Changes when the anterior cruciate ligament is transected

Muscle reflexes during gait elicited by electrical stimulation of the posterior cruciate ligament in humans

Effects of a 2-Hour Cheerleading Practice on Dynamic Postural Stability, Knee Laxity, and Hamstring Extensibility

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