Title | A Task-Optimized Neural Network Replicates Human Auditory Behavior, Predicts Brain Responses, and Reveals a Cortical Processing Hierarchy. |
Publication Type | Journal Article |
Year of Publication | 2018 |
Authors | Kell AJE, Yamins DLK, Shook EN, Norman-Haignere SV, McDermott JH |
Journal | Neuron |
Volume | 98 |
Issue | 3 |
Pagination | 630-644.e16 |
Date Published | 2018 05 02 |
ISSN | 1097-4199 |
Keywords | Acoustic Stimulation, Adolescent, Adult, Aged, Auditory Cortex, Female, Forecasting, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Nerve Net, Psychomotor Performance, Young Adult |
Abstract | A core goal of auditory neuroscience is to build quantitative models that predict cortical responses to natural sounds. Reasoning that a complete model of auditory cortex must solve ecologically relevant tasks, we optimized hierarchical neural networks for speech and music recognition. The best-performing network contained separate music and speech pathways following early shared processing, potentially replicating human cortical organization. The network performed both tasks as well as humans and exhibited human-like errors despite not being optimized to do so, suggesting common constraints on network and human performance. The network predicted fMRI voxel responses substantially better than traditional spectrotemporal filter models throughout auditory cortex. It also provided a quantitative signature of cortical representational hierarchy-primary and non-primary responses were best predicted by intermediate and late network layers, respectively. The results suggest that task optimization provides a powerful set of tools for modeling sensory systems. |
DOI | 10.1016/j.neuron.2018.03.044 |
Alternate Journal | Neuron |
PubMed ID | 29681533 |