The trapezoid body is concerned with
Trapezoid body is a trapezium-shaped mass of white matter lying in the anterior pa of tegmentum, posterior to basilar pa of pons.It is formed by decussation of transversely running fibres arising from cochlear nuclei of both sides before it reaches the superior olivary nucleus. This decussation is believed to help in localization of sound.(Ref: Vishram Singh textbook of clinical neuroanatomy second edition pg 80)
Pain and temperature
Hearing
Touch and pressure
Proprioception
Brain 