Abstract
This chapter provides a critical appraisal of the concept of a circuit-centered neurophenotype that is conceptualized within a genome-to-phenome framework. Representing many of the kinds of variables that complicate this model are a few select ones that are sampled in this chapter. They include the following: (a) The problem of minimal circuit definition—the many scales of neural circuitry and the difficulty of demarcating circuits within some forms of neural architecture; (b) the modulation of neural circuits and the alterations of circuit architecture through non-gene-regulated factors such as synaptic plasticity, extra-synaptic neuromodulation, and bioelectric dynamics; and (c) technical and methodological considerations in circuit delineation—as is coming to light in the field of microscale connectomics. Adding these complex variables from neuroscience into the fray make for great attenuation of the notion of a circuit neurophenotype in the behavioral neurosciences, and this is given some depth of coverage in this chapter. However, the chapter does not dismiss the utility of the concept of circuit neurophenotypes. It concludes with a discussion of the kinds of additional information that may be needed in order for the concept to be better validated.
Keywords
- Circuit neurophenotypes
- Circuit definition
- Circuit scale
- Circuit architecture
- Circuit morphology
- Synaptic plasticity
- Neuromodulation
- Bioelectric dynamics
- Gap junction communication
- Microscale connectomics
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Notes
- 1.
See for example the Special Issue of the Journal of Abnormal Psychology (2013), Vol. 122, No. 3.
- 2.
It is also commonly said in neuroscience that the Cajalian “neuron hypothesis” and the Golgi-labeled sparse neuron diagrams that Cajal elegantly illustrated are deep historical roots of this notion.
- 3.
Certain mathematical models may offer ways around this problem—see Chap. 14 in this volume—though in this instance, the number of neural variables that would be needed for the equations are currently improbable in terms of recording and discovery.
- 4.
Lecture given at Boston University, titled “The Promises and Perils of Connectomics,” December 4th, 2015.
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Jagaroo, V., Bosl, W., Santangelo, S.L. (2016). Appraising Circuit-Centered Neurophenotypes. In: Jagaroo, V., Santangelo, S. (eds) Neurophenotypes. Innovations in Cognitive Neuroscience. Springer, Boston, MA. https://doi.org/10.1007/978-1-4614-3846-5_3
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