Core Subsystems (Slings)
The Core Subsystems were first described by Vleeming et al. in a 1995 paper examining the complex anatomy of the thoracolumbar fascia (1). This foundational work detailed the multiple fascial layers of the thoracolumbar fascia, the mechanisms of force transmission between these layers, and the critical roles of specific ligaments and muscles in stabilizing and transferring force across the legs, pelvis, sacroiliac joint (SIJ), and spine.
Vleeming et al. proposed that specific groups of thoracolumbar fascial layers, muscles, and ligaments function synergistically in what they termed "slings." The paper introduced the original slings (later referred to as subsystems in some texts): the posterior oblique sling, the anterior oblique sling, and the longitudinal sling.
This research marked a significant advancement in the understanding of myofascial slings (or subsystems), transitioning the concept from a primarily theoretical framework to one grounded in both a comprehensive review of existing peer-reviewed studies and original research conducted by the authors. Prior to Vleeming et al.'s contributions, the concept of slings lacked substantial empirical support.
The Brookbush Institute subsequently expanded on this framework by introducing the Intrinsic Stabilization Subsystem as a fourth subsystem, incorporating insights from the work of Hodges et al. (20), Bergmark (1989), Comerford and Mottram (2001), and others. Additionally, the Brookbush Institute integrated these subsystems into a practical model for performance training, corrective exercise, and physical rehabilitation, enhancing the ability to select core exercises and design neuromuscular re-education techniques.
Core Subsystem (Myofascial Sling) Courses:
- Posterior Oblique Subsystem (POS)
- Intrinsic Stabilization Subsystem (ISS)
- Anterior Oblique Subsystem (AOS)
- Deep Longitudinal Subsystem (DLS)
Research Review Article:
- Vleeming, A., Pool-Goudzwaard, A. L., Stoeckart, R., van Wingerden, J. P., & Snijders, C. J. (1995). The posterior layer of the thoracolumbar fascia. Spine, 20(7), 753-758.