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Table 2 Associations between measures of transcallosal inhibition and age-related variations in unimanual performance of the right hand and left hand

From: Age and hemispheric differences in transcallosal inhibition between motor cortices: an ispsilateral silent period study

Direction of motor transcallosal inhibitiona Manual performance
Dexterity (GPT) Grip strength (Pinch dynamometer)
Left to right Right Hand
    LTI r= 0.59*** r= −0.37
    TCT r= 0.50** r= −0.46*
    iSP area r= −0.46* r= 0.38*
Right to left Left Hand
    LTI r= 0.50** r= −0.33
    TCT r= 0.42* r= −0.44*
    iSP area r= −0.57** r= 0.49**
  1. a The direction of transcallosal inhibition corresponds to the ispsilateral inhibition induced from the stimulated hemisphere towards the opposite hemisphere during voluntary contractions.
  2. Abbreviations: GPT Grooved Pegboard Test, LTI Latency of Transcallosal Inhibition, iSP ispsilateral Silent Period area, TCT Transcallosal Conduction Time.
  3. Significant correlations are marked with asterisks: *p<0.05, **p<0.01, ***p<0.001.