B737Theory - Flight Spoilers. Movement around the longitudinal axis of the aircraft is accomplished by the Ailerons and the Flight Spoilers. The Ailerons are moved by the respective PCU (Power Control Unit)
Why does spoiler extension cause straight-wing Learjets to pitch down, rather than up, and why did it take so long to discover this? - Aviation Stack Exchange
Spoilers
737 MAX - FBW Spoiler System
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What is the Purpose of Spoilers on a Plane? - Aeroclass.org
What is a spoiler in aviation? - Quora
Spoiler alert - AOPA
Aerospace | Free Full-Text | Aircraft-Type-Specific Impact of Speed Brakes on Lift and Drag
What are spoilers used for on a plane, and when are they used? - Quora