Use-dependent plasticity in human primary motor hand area: Synergistic interplay between training and immobilization
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Use-dependent plasticity in human primary motor hand area : Synergistic interplay between training and immobilization. / Raffin, Estelle; Siebner, Hartwig Roman.
In: Cerebral Cortex, Vol. 29, No. 1, 2019, p. 356-371.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Use-dependent plasticity in human primary motor hand area
T2 - Synergistic interplay between training and immobilization
AU - Raffin, Estelle
AU - Siebner, Hartwig Roman
PY - 2019
Y1 - 2019
N2 - Training and immobilization are powerful drivers of use-dependent plasticity in human primary motor hand area (M1HAND). In young right-handed volunteers, corticomotor representations of the left first dorsal interosseus and abductor digiti minimi muscles were mapped with neuronavigated transcranial magnetic stimulation (TMS) to elucidate how finger-specific training and immobilization interact within M1HAND. A first group of volunteers trained to track a moving target on a smartphone with the left index or little finger for one week. Linear sulcus shape-informed TMS mapping revealed that the tracking skill acquired with the trained finger was transferred to the nontrained finger of the same hand. The cortical representations of the trained and nontrained finger muscle converged in proportion with skill transfer. In a second group, the index or little finger were immobilized for one week. Immobilization alone attenuated the corticomotor representation and pre-existing tracking skill of the immobilized finger. In a third group, the detrimental effects of finger immobilization were blocked by concurrent training of the nonimmobilized finger. Conversely, immobilization of the nontrained fingers accelerated learning in the adjacent trained finger during the first 2 days of training. Together, the results provide novel insight into use-dependent cortical plasticity, revealing synergistic rather than competitive interaction patterns within M1HAND
AB - Training and immobilization are powerful drivers of use-dependent plasticity in human primary motor hand area (M1HAND). In young right-handed volunteers, corticomotor representations of the left first dorsal interosseus and abductor digiti minimi muscles were mapped with neuronavigated transcranial magnetic stimulation (TMS) to elucidate how finger-specific training and immobilization interact within M1HAND. A first group of volunteers trained to track a moving target on a smartphone with the left index or little finger for one week. Linear sulcus shape-informed TMS mapping revealed that the tracking skill acquired with the trained finger was transferred to the nontrained finger of the same hand. The cortical representations of the trained and nontrained finger muscle converged in proportion with skill transfer. In a second group, the index or little finger were immobilized for one week. Immobilization alone attenuated the corticomotor representation and pre-existing tracking skill of the immobilized finger. In a third group, the detrimental effects of finger immobilization were blocked by concurrent training of the nonimmobilized finger. Conversely, immobilization of the nontrained fingers accelerated learning in the adjacent trained finger during the first 2 days of training. Together, the results provide novel insight into use-dependent cortical plasticity, revealing synergistic rather than competitive interaction patterns within M1HAND
KW - Immobilization
KW - Learning transfer
KW - Plasticity
KW - Training
KW - Transcranial magnetic stimulation
U2 - 10.1093/cercor/bhy226
DO - 10.1093/cercor/bhy226
M3 - Journal article
C2 - 30364930
AN - SCOPUS:85058873025
VL - 29
SP - 356
EP - 371
JO - Cerebral Cortex
JF - Cerebral Cortex
SN - 1047-3211
IS - 1
ER -
ID: 235785523