Network Dynamics Mediating Ipsilateral Motor Cortex Activity during Unimanual Actions
نویسندگان
چکیده
منابع مشابه
Network Dynamics Mediating Ipsilateral Motor Cortex Activity during Unimanual Actions
Executing difficult actions with the left hand results in bilateral activity of motor areas along the precentral gyrus. Using TMS and fMRI, we explored the functional relationship between primary (M1) and premotor areas during unimanual actions, focusing on M1 activity in the ipsilateral hemisphere. Single-pulse TMS revealed that the amplitude of motor-evoked potentials (MEPs), elicited in the ...
متن کاملIpsilateral motor cortex activity during unimanual hand movements relates to task complexity.
Functional imaging studies have revealed recruitment of ipsilateral motor areas during the production of sequential unimanual finger movements. This phenomenon is more prominent in the left hemisphere during left-hand movements than in the right hemisphere during right-hand movements. Here we investigate whether this lateralization pattern is related specifically to the sequential structure of ...
متن کاملIncreased prefrontal activity and reduced motor cortex activity during imagined eccentric compared to concentric muscle actions
In this study we used functional magnetic resonance imaging (fMRI) to examine differences in recruited brain regions during the concentric and the eccentric phase of an imagined maximum resistance training task of the elbow flexors in healthy young subjects. The results showed that during the eccentric phase, pre-frontal cortex (BA44) bilaterally was recruited when contrasted to the concentric ...
متن کاملIncreased activity of the ipsilateral motor cortex during a hand motor task in patients with brain tumor and paresis.
PURPOSE To look for changes in the motor cortex in patients with brain tumors. METHODS Both cerebral hemispheres in seven patients with brain tumors were examined with functional MR imaging during a motor task performed by the hand opposite the site of tumor. The ratio of the activated area in the motor cortex ipsilateral/contralateral to the tested hand was calculated for each subject. Twent...
متن کاملMotor demand dependent activation of ipsilateral motor cortex 1
28 29 The role of ipsilateral primary motor cortex (M1) in hand motor control during complex 30 task performance remains controversial. Bilateral M1 activation is inconsistently 31 observed in fMRI studies of unilateral hand performance. Two factors limit the 32 interpretation of these data. As the motor tasks differ qualitatively in these studies, it is 33 conceivable that M1 contributions dif...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cognitive Neuroscience
سال: 2011
ISSN: 0898-929X,1530-8898
DOI: 10.1162/jocn.2011.21612