PSB-2000 Lecture Notes - Lecture 8: Medial Geniculate Nucleus, Inferior Colliculus, Auditory Cortex
Document Summary
Info such as the direcion, distance, and importance of sounds is put together later. There is convergent processing in the thalamus: at the midbrain and above, sound processing is bilateral* The auditory nerve projects to the cochlear nucleus in the medulla. Your ear compares loudness, the ear that isn"t facing the sound is called the sound shadow and that"s how you hear it on the other side. Sound informaion from both ears is put together and compared to determine locaion. The brain compares which ear the sound gets too sooner: this is called the itd (interaural temporal diference, the ime diference between ears is microseconds. The brain compares the diference involume between the two ears: this is called ild, this works beter for high frequency sounds. Both itd and ild are computed between the medulla and pons. Auditory centers in the brainstem project to the midbrain.
