acoustic radiation acoustic radiation the acoustic radiations or auditory radiations are structures found in the brain, in the ventral cochlear pathway, a part of the auditory system. acoustic radiation arising in the medial geniculate nucleus and end in primary auditory cortex (transverse temporal gyri). lesions to the auditory radiations could be a cause of cortical deafness. auditory radiationshuman auditory pathway. acoustic radiation is shown as red arrow at center-top.detailsidentifierslatinradiatio acusticaneuronames2084ta98a14.1.08.662 a14.1.09.545ta25587fma62413anatomical terms of neuroanatomy