The frontal system is the brain's executive.
We start with the sentence the rest of the module depends on.
That is the most important sentence in this module. The frontal system is not a motivation system, not a personality module, and not the part of the brain that decides whether a child is well-behaved. It is the part of the brain that holds instructions across time, inhibits the response that wants to fire first, and switches cleanly between tasks. When it operates efficiently, the child looks 'on task.' When it does not, the cost is paid one dropped step, one called-out answer, one freeze at the schedule change at a time.
The PSOF framework
PSOF organizes pediatric sensorimotor observation into nine canonical neurodevelopmental domains. The frontal domain is the first critical-path unit in this certification. It is the most directly adjacent to the Cerebellar module — both produce multi-step procedural failure, but the underlying constraint is different. Cerebellar fails on execution timing once the plan is held. Frontal fails on the holding of the plan in the first place.
- 01Frontal
- 02Cerebellar
- 03Vestibular
- 04Proprioceptive
- 05Limbic-Prefrontal
- 06Autonomic-High
- 07Autonomic-Low
- 08Brainstem
- 09Visual-Oculomotor
Constraint-based readiness
The Constraint-Based Medicine framework holds that adaptive systems must demonstrate readiness before exposure to increased demand. When the frontal system is the constraint, the demand of multi-step directions, whole-group questioning, and unscheduled transitions lands on a system that cannot reliably hold, inhibit, or switch. Behavior plans, recess removal, and verbal correction all assume an inhibition system that can respond to consequences. When that assumption is wrong, more consequences do not produce a more compliant child. They produce a more shaped one. This module trains you to see the constraint underneath the behavior log.