Multifunctionality poses significant challenges for human brain mapping. Cathy Price and Karl Friston argue that brain regions perform many functions in one sense and a single function in another. Thus, neuroscientists must revise their “cognitive ontologies” to obtain systematic mappings. Colin Klein draws a different lesson from these findings: neuroscientists should abandon systematic mappings for context-sensitive ones. I claim that neither account succeeds as a general treatment of multifunctionality. I argue that brain areas, like genes or organs, are multifunctional in (...) different ways. I call this the “functional heterogeneity hypothesis.” I contend that different multifunctional parts require different mapping strategies. (shrink)

Functional localization is a central aim of cognitive neuroscience. But the nature and extent of functional localization in the human brain have been subjects of fierce theoretical debate since the 19th Century. In this essay, I first examine how concepts of functional localization have changed over time. I then analyze contemporary challenges to functional localization drawing from research on neural reuse, neural degeneracy, and the context-dependence of neural functions. I explore the consequences of these challenges for topics in philosophy of (...) science and philosophy of mind including localizationist versus anti-localizationist approaches to cognitive neuroscience, multiple realizability, reverse inference in functional neuroimaging, and the modularity of mind. (shrink)

What does cognitive neuroscience contribute to our philosophical understanding of concepts? Over the past several decades, brain researchers have employed the tools of cognitive neuroscience and neuropsychology to probe the structure and func­tion of the conceptual system. The results of this effort, which are often extremely surprising, raise more questions than they resolve. Brain research has invigorated age-old philosophical debates about the nature of concepts—such as whether concepts are perceptual representations—and generated new controversies about how conceptual knowledge is organized. In (...) this essay, I examine three debates in the neuroscience of conceptual knowledge: whether concepts are embodied or couched in amodal representations, whether conceptual knowledge is organized according to evolved categories, and whether the brain has multiple conceptual systems. My purpose is not to resolve these debates—rather, I intend to show how many of the proposed solutions fail to accommodate the diverse range of data emerging from cognitive neuroscience. I am therefore skeptical that brain data alone will resolve these issues, but remain optimistic that neuroscience has much to contribute to philosophical accounts of concepts. (shrink)