Cours Marc Flashcards
What occurs when the foot or ankle is sprained?
Partial de-afferentation of the injured joints occurs.
This results in impaired reflex stabilization of the foot.
What was the basis for treatment by coordination exercises according to Freeman?
The hope that some central process might compensate for articular de-afferentation and its consequent proprioceptive deficit.
Freeman suggested that central mechanisms could help recover motor control.
What does the existence of bilateral impairment after an ankle sprain suggest?
It does not support the hypothesis that ligament mechanoreceptor damage causes neuromuscular control deficits after injury.
This conclusion was drawn by Evans et al. in 2004.
How do pain and edema affect postural control?
They seem to alter postural control at the central level and may prevent cortical changes associated with gains in motor performance.
Boudreau et al. (2010) indicated that these factors impact motor control.
What is suggested by the presence of bilateral postural deficiencies after an ankle sprain?
A central problem of integration of somatosensory information and motor command contributes to functional instability.
This indicates a more complex issue beyond just peripheral injury.
What modifications occur in the sensorimotor cortex due to pain?
Modifications in excitability occur quickly in the presence of pain, immobilization, and altered movement patterns.
Roy et al. (2017) and Schabrun (2015) discuss these changes.
What is the estimated latency for producing a reflex response in case of functional instability?
84 ms + 107 ms.
This was reported by Hopkins et al. in 2009.
What must occur for the joint to be adequately protected against external perturbation?
The perturbation must be anticipated and the muscles must be activated before the perturbation.
Santos et al. (2010) emphasize the importance of anticipatory control.
What are joint receptors sensitive to?
They are sensitive to stretching only at the end of the joint range and are not part of a monosynaptic reflex loop.
This highlights the complexity of joint receptor functions.
What is necessary for adequate protection of lateral ankle ligaments during movement?
Anticipatory compensatory adjustments during walking.
Monaghan et al. (2006) studied the EMG activity of peroneal muscles.
What does the alteration in force moment in the frontal plane indicate?
It seems to be a protective mechanism to prevent ankle sprains, supported by increased EMG activity.
This was indicated by Delahunt et al. in 2006.
What is the global rehabilitation strategy aimed at?
Isolating and repeatedly stimulating the systems and strategies of postural stability control.
The goal is to promote redundancy and functional reorganization.
What should be included in the rehabilitation program for ankle injuries?
- Muscle strengthening
- Neuromuscular training
- Exercises for balance and coordination
- Proprioceptive training
- Plyometric exercises
This comprehensive approach addresses various aspects of recovery.
What is the significance of sensory weighting theory in balance control?
The relative contribution of sensory systems to balance maintenance varies according to the task, environment, and quality of sensory information.
Shummway-Cook and Woollacott (2007) discuss the implications of this theory.
What is the primary strategy for static balance control?
Hip strategy is primarily used unless the base of support is very narrow, where ankle strategy becomes more significant.
Winter (1996) elaborates on the strategies used for maintaining balance.
What factors determine the strategy used for postural stability?
- Nature and magnitude of a perturbation
- The environment
These factors influence how the body responds to maintain stability.
What is the estimated time required to produce an adequate response to protect the lateral ankle ligaments?
A maximum contraction of peroneal muscles is required quickly after an external perturbation.
Adjustments must be rapid to prevent injury.
What is the aim of plyometric training in rehabilitation?
To improve control and strength of the hip through dynamic exercises.
This type of training is crucial for restoring function.
What should be emphasized during the reception of jumps in rehabilitation?
Quality of knee alignment and proper control of the trunk and pelvis.
Proper mechanics are essential for injury prevention.
Quel est l’objectif principal de la réception de sauts?
Qualité de l’alignement genou/2ème orteil et contrôle du bassin et tronc.
Quelle stratégie est utilisée pour la base de support réduite?
Stratégie de cheville en M/L.
Qu’est-ce que l’alternance entre le sol et les stones nécessite?
Une réponse réflexe et des ajustements posturaux constants.
Quels types de jeux de pieds peuvent être utilisés?
- Alternés
- Pieds joints
- 2 ou 4 stones avec ou sans transition au sol.
Comment les poutres influencent-elles la stratégie de chevilles?
Elles diminuent fortement l’efficacité de la stratégie de chevilles.
