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

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

Direction of motor transcallosal inhibition^a	Manual performance
Direction of motor transcallosal inhibition^a	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**

^a The direction of transcallosal inhibition corresponds to the ispsilateral inhibition induced from the stimulated hemisphere towards the opposite hemisphere during voluntary contractions.
Abbreviations: GPT Grooved Pegboard Test, LTI Latency of Transcallosal Inhibition, iSP ispsilateral Silent Period area, TCT Transcallosal Conduction Time.
Significant correlations are marked with asterisks: *p<0.05, **p<0.01, ***p<0.001.

ISSN: 1471-2202