The vestibular system is not a balance system.
We start with the sentence the rest of the module depends on.
That is the most important sentence in this module. The vestibular system is a postural stability and spatial orientation system. Its job is to maintain the body's relationship to gravity and to the surrounding environment at all times, across all positions, during all transitions. Balance is one visible expression of that job. It is not the job itself. Understanding this distinction determines what you look for in a student and what you miss.
The PSOF framework
PSOF organizes pediatric sensorimotor observation into nine canonical neurodevelopmental domains. Each domain governs a specific class of neurologic function that interacts directly with academic performance. The vestibular domain is the entry point for this certification. Understanding where it sits within the full framework helps you understand both what it covers and, critically, what it does not cover.
- 01Frontal
- 02Cerebellar
- 03Vestibular
- 04Proprioceptive
- 05Limbic-Prefrontal
- 06Visual
- 07Auditory
- 08Tactile
- 09Interoceptive
Constraint-based readiness
The clinical framework behind PSOF is called Constraint-Based Medicine. Its organizing premise is this: adaptive systems must demonstrate readiness before exposure to increased demand. A constraint is any upstream limitation that prevents appropriate neurologic adaptation to load. When the vestibular system is the constraint, instruction applied before that constraint is identified and addressed lands on a system that cannot receive it. That is not a teaching problem. It is a sequencing problem. This module trains you to see the constraint.