1/4 Hour Neuro #28: "How to Prevent Tendonitis in Badminton Players"

Introduction: Understanding Pain Beyond Tissue Damage

Welcome to this episode of the neuro quarter-hour, dedicated to a common question among athletes, particularly badminton players: how to prevent and manage recurring tendonitis and joint pain? We will discuss the case of a badminton enthusiast suffering from chronic knee pain and ankle tendonitis, with no detectable injury on medical imaging. This situation, far from being isolated, invites us to explore a different approach to pain, focusing on the nervous system and postural reprogramming.

It is crucial to understand that pain is not always directly correlated with tissue damage. The brain plays a predominant role in interpreting signals and creating the sensation of pain. If the brain does not feel safe, it may activate defense mechanisms, including pain, even in the absence of apparent physical injury. This is why a thorough assessment of the nervous system's functioning, including the brain, cerebellum, brainstem, and motor and sensory areas, is essential.

The Neuro-Postural Approach: Beyond Traditional Medicine

The Role of the Brain and Nervous System in Chronic Pain

When conventional medical examinations (MRIs, X-rays) reveal nothing despite persistent pain, it is time to consider the nervous system. The brain is the center of interpretation of our environment. If it perceives danger or instability, it may generate pain as a protective mechanism. This does not mean the brain "is not functioning well", but rather understanding how it interprets sensory information and whether it can ensure optimal stability.

The Importance of Injury History and Compensations

The history of injuries, even old ones (sprains, falls, scars), is a valuable source of information. A poorly rehabilitated injury, even if it seems insignificant at the time, can create patterns of postural and neural compensation that establish and manifest years later as chronic pain. For example, an old ankle sprain can lead to a right-side imbalance, affecting walking, cervical mobility, and even proprioception.

We often observe individuals with problems on one side of the body (right, in this case) who, after analyzing their gait and history, reveal vestibular imbalances, difficulties with cervical rotation, or subtle sensory issues. These elements are major clues for understanding the origin of the pain.

Reflex Stabilization and PRMF: A Key Concept

The concept of Reflex Stabilization and PRMF (Posture Reflexive Motor Function) is fundamental. When we perform a voluntary movement (for example, moving the left arm), there is a reflex stabilization of the opposite side of the body. This involves complex feedback loops where the cerebellum plays a crucial role. Approximately 10% of voluntary movement is consciously controlled, while 90% of the information travels through ipsilateral pathways at the brainstem for reflex stabilization.

If reflex stabilization is compromised on one side, it can create uneven muscle tension, affect local blood pressure, and ultimately generate pain. This is why working solely on the painful side is not always sufficient.