Neurophysiologic correlates of fMRI in human motor cortex
نویسندگان
چکیده
منابع مشابه
An fMRI study of human visual cortex in response to spatiotemporal properties of visual stimuli
ABSTRACT Background: The brain response to temporal frequencies (TF) has been already reported, but with no study reported for different TF with respect to various spatial frequencies (SF). Materials and Methods: fMRI was performed by 1.5T GE-system in 14 volunteers during checkerboard, with TFs of 4, 6, 8 and 10Hz in low and high SFs of 0.5 and 8cpd. Results: Average percentage BOLD signa...
متن کاملfMRI evaluation of somatotopic representation in human primary motor cortex.
We used fMRI to map foot, elbow, fist, thumb, index finger, and lip movements in 30 healthy subjects. For each movement type confidence intervals of representational sites in the primary motor cortex (M1) were evaluated. In order to improve the precision of their anatomical localization and to optimize the mapping of cortical activation sites, we used both the assessment of locations in the con...
متن کاملCOMPLEX ORGANIZATION OF HUMAN PRIMARY MOTOR CORTEX: A HIGH RESOLUTION fMRI STUDY Abbreviated title: Human motor cortex
A traditional view of the human motor cortex is that it contains an overlapping sequence of body part representations from the tongue in a ventral location to the foot in a dorsal location. In the present study, high resolution functional magnetic resonance imaging (1.5 X 1.5 X 2 mm) was used to examine the somatotopic map in the lateral motor cortex of humans, to determine whether it followed ...
متن کاملan fmri study of human visual cortex in response to spatiotemporal properties of visual stimuli
abstract background: the brain response to temporal frequencies (tf) has been already reported, but with no study reported for different tf with respect to various spatial frequencies (sf). materials and methods: fmri was performed by 1.5t ge-system in 14 volunteers during checkerboard, with tfs of 4, 6, 8 and 10hz in low and high sfs of 0.5 and 8cpd. results: average percentage bold signal ...
متن کاملNeurophysiologic Correlates of Aging-Related Muscle Weakness
38 Muscle weakness associated with aging implicates central neural degeneration. However, role of 39 the primary motor cortex (M1) is poorly understood despite evidence that gains in strength in younger 40 adults are associated with its adaptations. We investigated whether weakness of biceps brachii in aging 41 analogously relates to processes in M1. We enrolled 20 young (22.6±0.87 years) and 2...
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: Human Brain Mapping
سال: 2011
ISSN: 1065-9471
DOI: 10.1002/hbm.21314