Abstract：
:Observation of people performing movements facilitates motor planning, execution and memory formation. Tempo, a crucial aspect involved in the execution of rhythmic movements, is normally perceived and learned through auditory channels. In this work, we ascertained whether: first, the frequency of self-paced finger movements (SPMs), which in normal subjects is around 2 Hz, is modified by prior observation of movements performed at either 1 or 3 Hz; second, such changes are lasting; third, there is an effect of time interval between observation and performance. We finally determined the effect of providing explicit information about the upcoming motor task. Seventy-two normal subjects (12 groups) performed a simple finger sequence at different intervals after observation of videos of either landscapes or finger opposition movements. Both with and without information about the upcoming task, observation influenced the tempo of SPMs and led to memory formation. With knowledge of the upcoming task, such changes occurred at all observation-execution intervals, while without instructions, changes took place only when SPMs were performed immediately after observation. Compared to explicit instructions, the absence of instructions produced tempo's changes that more closely resembled the observed rhythms. We conclude that learning requires a prompt comparison between visual and sensorimotor representations of movements; moreover, learning with explicit instructions is more efficient, as activity in both the dorsal and ventral streams might be potentiated by the chatecholaminergic attentional systems that promote long-term potentiation. These results provide the bases for novel neurorehabilitation strategies in terms of temporal re-organization of movement.
journal_name
Brain Res Bulljournal_title
Brain research bulletinauthors
Bove M,Tacchino A,Pelosin E,Moisello C,Abbruzzese G,Ghilardi MFdoi
10.1016/j.brainresbull.2009.04.008subject
Has Abstractpub_date
2009-09-28 00:00:00pages
122-7issue
3eissn
0361-9230issn
1873-2747pii
S0361-9230(09)00121-Xjournal_volume
80pub_type
杂志文章abstract：:Cerebral malaria (CM) is the severe neurological complication associated with Plasmodium falciparum infection. In clinical settings CM is predominantly characterized by fever, epileptic seizures, and asexual forms of parasite on blood smears, coma and even death. Cognitive impairment in the children and adults even af...
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pub_type： 杂志文章,评审
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journal_title：Brain research bulletin
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