Dr. Jean Ayres, often considered the “founder” of sensory processing theory, defined modulation as the “brain’s regulation of its own activity”. It involves facilitating some neural messages to produce an enhanced response and inhibiting other messages to reduce activity. She highlighted the role of the vestibular system in modulating the activity of the other systems.

Modulation has also be referred to as the process that keeps brain activity in harmony with all the other functions of the nervous system.

1.) Excessive difficulty falling asleep

2.) Excessive / extreme tantrums

3.) Difficult controlling emotions

4.) Aggressive behaviors

5.) Excessive difficulty staying asleep

6.) Sensitivities to touch input

7.) Sensitivities to movement input

8.) Sensitivities to sounds and/or visual input

9.) General irritability

10.) General anxiety