DCM parameter priors including the observation model, neuronal model, and experimental effects
| Parameters | Prior | Interpretation | |
|---|---|---|---|
| Mean (π) | Variance (σ) | ||
| Observation model | |||
| αu | 0 | 1/16 | Exogenous white input |
| αs | 0 | 1/16 | Channel white noise |
| βu | 0 | 1/16 | Exogenous pink input |
| βs | 0 | 1/16 | Channel pink noise |
| ϴ | 1 | 1 | Lead-field gain |
| [Deep, super, stellate] | [0.2, 0.8, 0.2] | [1/16] | [Subpopulation contributions] |
| Neuronal sources | |||
| 1/κ1 | 2 ms | 1/16 | Time constant (s.s.) |
| 1/κ2 | 2 ms | 1/16 | Time constant (s.p.) |
| 1/κ3 | 16 ms | 1/16 | Time constant (i.i.) |
| 1/κ4 | 28 ms | 1/16 | Time constant (d.p.) |
| γ1 | 4 | 1/16 | Intrinsic connection (s.s. to >s.s.) |
| γ2 | 4 | 1/16 | Intrinsic connection (s.p. to >s.s.) |
| γ3 | 4 | 1/16 | Intrinsic connection (i.i. to >s.s.) |
| γ4 | 4 | 1/16 | Intrinsic connection (i.i. to >i.i.) |
| γ5 | 4 | 1/16 | Intrinsic connection (s.s. to >i.i.) |
| γ6 | 2 | 1/16 | Intrinsic connection (d.p. to >i.i.) |
| γ7 | 4 | 1/16 | Intrinsic connection (s.p. to >s.p.) |
| γ8 | 4 | 1/16 | Intrinsic connection (s.s. to >s.p.) |
| γ9 | 2 | 1/16 | Intrinsic connection (i.i. to >d.p.) |
| γ10 | 1 | 1/16 | Intrinsic connection (d.p. to >d.p.) |
| D | 1 ms | 1/16 | Laminar delay |
| Experimental design | |||
| β1 | 0 | 1/8 | Modulation of γ1 |
| β2 | 0 | 1/8 | Modulation of γ7 |
| β3 | 0 | 1/8 | Modulation of γ4 |
| β4 | 0 | 1/8 | Modulation of γ10 |
s.s., Spiny stellate; s.p., superficial pyramidal; i.i., inhibitory interneuron; d.p., deep pyramidal.