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42) Our results suggest that parietal ccPAS can modulate M1 excitability and PPC-M1 connectivity and is a new approach to modify motor excitability and sensorimotor interaction.
* Induction of motor associative plasticity in the posterior parietal cortex-primary motor network.
- There is anatomical and functional connectivity between the primary motor cortex (M1) and posterior parietal cortex (PPC) that plays a role in sensorimotor integration. In this study, we applied corticocortical paired-associative stimuli to ipsilateral PPC and M1 (parietal ccPAS) in healthy right-handed subjects to test if this procedure could modulate M1 excitability and PPC-M1 connectivity. One hundred and eighty paired transcranial magnetic stimuli to the PPC and M1 at an interstimulus interval (ISI) of 8 ms were delivered at 0.2 Hz. We found that parietal ccPAS in the left hemisphere increased the excitability of conditioned left M1 assessed by motor evoked potentials (MEPs) and the input-output curve. Motor behavior assessed by the Purdue pegboard task was unchanged compared with controls. At baseline, conditioning stimuli over the left PPC potentiated MEPs from left M1 when ISI was 8 ms. This interaction significantly attenuated at 60 min after left parietal ccPAS. Additional experiments showed that parietal ccPAS induced plasticity was timing-dependent, was absent if ISI was 100 ms, and could also be seen in the right hemisphere. Our results suggest that parietal ccPAS can modulate M1 excitability and PPC-M1 connectivity and is a new approach to modify motor excitability and sensorimotor interaction.
=>新発見の, 新しい, 現代的な, 新参の
Overview of adj new
The adj new has 11 senses (first 5 from tagged texts)
1. (310) new -- (not of long duration; having just (or relatively recently) come into being or been
made or acquired or discovered; "a new law"; "new cars"; "a new comet"; "a new friend"; "a new
year"; "the New World")
2. (36) fresh, new, novel -- (original and of a kind not seen before; "the computer produced a
completely novel proof of a well-known theorem")
3. (11) raw, new -- (lacking training or experience; "the new men were eager to fight"; "raw
recruits")
4. (5) new, unexampled -- (having no previous example or precedent or parallel; "a time of
unexampled prosperity")
5. (3) new -- (other than the former one(s); different; "they now have a new leaders"; "my new car
is four years old but has only 15,000 miles on it"; "ready to take a new direction")
6. new -- (unaffected by use or exposure; "it looks like new")
7. newfangled, new -- ((of a new kind or fashion) gratuitously new; "newfangled ideas"; "she buys
all these new-fangled machines and never uses them")
8. New -- (in use after medieval times; "New Eqyptian was the language of the 18th to 21st
dynasties")
9. Modern, New -- (used of a living language; being the current stage in its development; "Modern
English"; "New Hebrew is Israeli Hebrew")
10. new, young -- ((of crops) harvested at an early stage of development; before complete maturity;
"new potatoes"; "young corn")
11. new -- (unfamiliar; "new experiences"; "experiences new to him"; "errors of someone new to the
job")
Overview of adv new
The adv new has 1 sense (first 1 from tagged texts)
1. (1) newly, freshly, fresh, new -- (very recently; "they are newly married"; "newly raised
objections"; "a newly arranged hairdo"; "grass new washed by the rain"; "a freshly cleaned floor";
"we are fresh out of tomatoes")
--- WordNet end ---