Sensory neurons in the vestibulocochlear nerve (VIII) synapse with neurons in the medulla oblongata that project to the inferior colliculus of the midbrain (fig. 10.23). Neurons in this area, in turn, project to the thalamus, which sends axons to the auditory cortex of the temporal lobe. By means of this pathway, neurons in different regions of the basilar membrane stimulate neurons in corresponding areas of the auditory cortex. Each area of this cortex thus represents a different part of the basilar membrane and a different pitch (fig. 10.24).
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.