Table 2 Functional short paths in the right and left hemisphere for all conditions. The tabular summary displays the shortest paths from the visuo-motor node in subarea hOc4d to SMA and Broca area BA44/ventral PMC for the four conditions in the 0.45 thresholded graph. The functional edges column contain the percentile threshold and the associated minimum number of high weight edges required to generate the short paths as compared to their total number per condition.

From: Exploring imitation of within hand prehensile object manipulation using fMRI and graph theory analysis

Condition

Left hemisphere pathways

Functional edges (at percentile)

Right hemisphere pathways

Functional edges (at percentile)

Total edges per condition

Manipulation left

    

1060

 Do motor path

hOc4d-PGa-hIP1-SMA

302 (> 0.69)

hOc4d-PGa-hIP1-SMA

151 (> 0.85)

 

 Ve motor path

hOc4d-PGa-BA44/vPMC

302 (> 0.69)

hOc4d-PGa-OP1-BA44/vPMC

151 (> 0.85)

 

 Recursive loop

 

hOc3d-7P-(hIp3-PGa-PGp)-(hOcd4-hOc3)

97 (> 0.9)

 

Manipulation right

    

1143

 Do motor path

hOc4d-PGa-hIP1-SMA

361 (> 0.68)

hOc4d-PGa-hIP1-SMA

213 (> 0.81)

 

 Ve motor path

hOc4d-PGa-BA45-BA44/vPMC

361 (> 0.68)

hOc4d-PGa-BA44/vPMC

213 (> 0.81)

 

 Recursive loop

 

hOc3d-7P-(hIp3-PGa-PGp)-(hOcd4-hOc3d)

153 (> 0.86)

 

Observation of manipulation by left hand

    

1159

 Do motor path

hOc4d-7A,7P-SMA

253 (> 0.78)

hOc4d-7A,7P-SMA

232 (> 0.79)

 

 Do motor path

hOc4d-7A,5M-SMA

227 (> 0.8)

hOc4d-7A,5M-SMA

293 (> 0.74)

 

 Ve motor path

 

 

Observation of manipulation by right hand

    

965

 Do motor path

hOc4d-7A,7P-SMA

145 (> 0.84)

hOc4d-7A,7P-SMA

224 (> 0.76)

 

 Do motor path

hOc4d-7A,5M

237 (> 0.75)

hOc4d-7A,5M-SMA

231 (> 0.76)

 

 Do motor path

hOc4d-hIP1-SMA

224 (> 0.78)

 

 Ve motor path

 
  1. In the right hemisphere the short paths appear at a considerably lower number of high weight edges. A suggested recursive loop originating in subarea hOc3d is active with few functional edges in the right hemisphere only during motor execution.