Neural Plasticity

Research Article

Motor Cortical Networks for Skilled Movements Have Dynamic Properties That Are Related to Accurate Reaching

Table 3

The mean () connectivity ratio and the number of inferred significant neuronal associations (including self-interaction) in three cell-type subcategories in 8 datasets. The first two numbers in each column show the prevalence of connected neuronal pairs as a fraction of the total number of possible connections during unsuccessful and successful (in brackets) trials, respectively. The numbers in square brackets in the last 3 columns indicate the numbers of all possible pairwise neuronal associations (including self-interaction) for different data sets. Two neurons are said to interact if their pairwise connection coefficients at any time lag are significantly different from 0. Note that in order to compute the fraction of significant neuronal interactions in the three cell-pair subcategories, we need to divide the listed raw numbers by the respective numbers in the square brackets in each group.


Dataset	Condition	Mean ratio	Ratio of significant neuronal interactions
			RS-RS	RS-FS	FS-FS

1	Background	0.08 (0.07)	0.3 (0.28) [64]	0.38 (0.35) [80]	0.88 (0.88) [25]
	reaching	0.09 (0.12)	0.61 (0.63)	0.4 (0.41)	0.96 (1)
2	Background	0.45 (0.46)	0.27 (0.29) [100]	0.24 (0.24) [100]	0.6 (0.64) [25]
	reaching	0.49 (0.61)	0.6 (0.64)	0.24 (0.27)	0.68 (0.68)
3	Background	0.26 (0.24)	0.02 (0.02) [49]	0.05 (0.08) [112]	0.25 (0.3) [64]
	reaching	0.29 (0.47)	0.31 (0.35)	0.2 (0.2)	0.47 (0.42)
4	Background	0.52 (0.49)	0.32 (0.24) [25]	0.24 (0.2) [50]	0.8 (0.76) [25]
	reaching	0.59 (0.72)	0.6 (0.64)	0.44 (0.44)	1 (1)

5	Background	0.56 (0.74)	0.19 (0.44) [36]	0.29 (0.44) [48]	0.81 (1) [16]
	reaching	0.62 (0.79)	0.36 (0.64)	0.25 (0.44)	0.81 (0.94)
6	Background	0.48 (0.53)	0.18 (0.2) [49]	0.19 (0.24) [42]	0.78 (0.89) [9]
	reaching	0.56 (0.86)	0.77 (0.77)	0.5 (0.5)	1 (1)
7	Background	0.14 (0.27)	0.03 (0.05) [64]	0.13 (0.31) [16]	1 (1) [1]
	reaching	0.19 (0.48)	0.2 (0.3)	0.19 (0.25)	1 (1)
8	Background	0.14 (0.27)	0 (0.08) [36]	0.08 (0.18) [72]	0.69 (0.92) [36]
	reaching	0.16 (0.26)	0.03 (0.08)	0.1 (0.25)	0.81 (0.89)