Hailey G. answered 02/17/23
Neuroscience PhD Candidate Available for all STEM
All neurons in the brain are constantly communicating via electrical signals and neurotransmitter action. However, these communications happen at different speeds.
The left and right side of the brain need to communicate almost instantaneously so the left and right sides of your body and mind are doing the same thing at the same time.
The meninges is a 3-layer protective barrier surrounding the brain (between the brain and skull) that helps cushion it and protect it from damage. While it does surround both hemispheres, it is not composed of neurons and doesn't communicate anything.
The limbic system is generally associated with emotional regulation but only exists in the midbrain region and doesn't fully span both hemispheres.
The correct answer is corpus colosseum. The corpus colosseum is a bundle of neurons that spans the entire brain from rostral to caudal (front to back). This dense bundle of nerve fibers is myelinated and allows the two hemispheres to stay in sync by communicating back and forth via these nerve fibers.