Involvement of subareas within the dorsal premotor area (PMd) in a conceptually demanding visuomotor task

2009 ◽  
Vol 65 ◽  
pp. S168
Author(s):  
Yoshihisa Nakayama ◽  
Nariko Arimura ◽  
Tomoko Yamagata ◽  
Jun Tanji ◽  
Eiji Hoshi
Keyword(s):  
Premotor Area ◽  
Visuomotor Task

Neural Encoding Correlates of High and Low Verbal Memory Performance

2006 ◽  
Vol 20 (2) ◽  
pp. 68-78 ◽  
Author(s):  
Sibylle Heinze ◽  
Gudrun Sartory ◽  
Bernhard W. Müller ◽  
Armin de Greiff ◽  
Michael Forsting ◽  
...  
Keyword(s):  
Verbal Memory ◽  
Parietal Lobe ◽  
Functional Neuroimaging ◽  
Memory Performance ◽  
Extrastriate Cortex ◽  
Parahippocampal Gyrus ◽  
Premotor Area ◽  
High Performers ◽  
Rehearsal Strategy ◽  
Common Memory

Neuroimaging studies have indicated involvement of left prefrontal cortex and temporal areas in verbal memory processes. The current study used event-related functional neuroimaging to compare encoding of subsequently recalled and not recalled words in high and low memory performers. Fifteen healthy volunteers were given lists of words to learn with immediate recall and to read as a control condition. High performers reported to have visualized the words whereas low performers used a rehearsal strategy. Compared to reading, unsuccessful encoding was associated with thalamic and left premotor area (BA 6) activity. Comparing successful with unsuccessful learning yielded widespread activity of the left prefrontal and posterior temporal gyrus as well as the left superior parietal lobe in the whole group. Low performers showed activation of the left premotor area throughout learning and additionally of the left middle temporal and parahippocampal gyrus during successful encoding. High performers showed increased activation in the extrastriate cortex throughout learning and additionally in the left parietal post- and paracentral areas as well as in the right precuneus during successful encoding. The results suggest that high verbal memory performance is the result of spatiovisual activation concomitant to imagery and low performance of hippocampal and motor activation, the latter being associated with rehearsal, with a common memory circuit subserving both groups.

Neurophysiological and behavioral indices of time pressure effects on visuomotor task performance

2000 ◽  
Vol 9 (3) ◽  
pp. 287-298 ◽  
Author(s):  
S.M Slobounov ◽  
K Fukada ◽  
R Simon ◽  
M Rearick ◽  
W Ray
Keyword(s):  
Task Performance ◽  
Time Pressure ◽  
Pressure Effects ◽  
Behavioral Indices ◽  
Visuomotor Task

Corticospinal Tract Microstructure Correlates With Beta Oscillatory Activity in the Primary Motor Cortex After Stroke

Stroke ◽  
2021 ◽  
Author(s):  
Robert Schulz ◽  
Marlene Bönstrup ◽  
Stephanie Guder ◽  
Jingchun Liu ◽  
Benedikt Frey ◽  
...  
Keyword(s):  
Motor Cortex ◽  
Fractional Anisotropy ◽  
Primary Motor Cortex ◽  
Supplementary Motor Area ◽  
Premotor Cortex ◽  
Motor Impairment ◽  
Motor Area ◽  
Oscillatory Activity ◽  
Premotor Area ◽  
Beta Power

Background and Purpose: Cortical beta oscillations are reported to serve as robust measures of the integrity of the human motor system. Their alterations after stroke, such as reduced movement-related beta desynchronization in the primary motor cortex, have been repeatedly related to the level of impairment. However, there is only little data whether such measures of brain function might directly relate to structural brain changes after stroke. Methods: This multimodal study investigated 18 well-recovered patients with stroke (mean age 65 years, 12 males) by means of task-related EEG and diffusion-weighted structural MRI 3 months after stroke. Beta power at rest and movement-related beta desynchronization was assessed in 3 key motor areas of the ipsilesional hemisphere that are the primary motor cortex (M1), the ventral premotor area and the supplementary motor area. Template trajectories of corticospinal tracts (CST) originating from M1, premotor cortex, and supplementary motor area were used to quantify the microstructural state of CST subcomponents. Linear mixed-effects analyses were used to relate tract-related mean fractional anisotropy to EEG measures. Results: In the present cohort, we detected statistically significant reductions in ipsilesional CST fractional anisotropy but no alterations in EEG measures when compared with healthy controls. However, in patients with stroke, there was a significant association between both beta power at rest ( P =0.002) and movement-related beta desynchronization ( P =0.003) in M1 and fractional anisotropy of the CST specifically originating from M1. Similar structure-function relationships were neither evident for ventral premotor area and supplementary motor area, particularly with respect to their CST subcomponents originating from premotor cortex and supplementary motor area, in patients with stroke nor in controls. Conclusions: These data suggest there might be a link connecting microstructure of the CST originating from M1 pyramidal neurons and beta oscillatory activity, measures which have already been related to motor impairment in patients with stroke by previous reports.

scholarly journals Systematic examination of low-intensity ultrasound parameters on human motor cortex excitability and behavior

eLife ◽  
2020 ◽  
Vol 9 ◽  
Author(s):  
Anton Fomenko ◽  
Kai-Hsiang Stanley Chen ◽  
Jean-François Nankoo ◽  
James Saravanamuttu ◽  
Yanqiu Wang ◽  
...  
Keyword(s):  
Motor Cortex ◽  
Short Interval ◽  
Motor Evoked Potential ◽  
Cortical Inhibition ◽  
Transcranial Ultrasound ◽  
Human Motor Cortex ◽  
Low Intensity ◽  
Visuomotor Task ◽  
Motor Cortex Excitability ◽  
And Behavior

Low-intensity transcranial ultrasound (TUS) can non-invasively modulate human neural activity. We investigated how different fundamental sonication parameters influence the effects of TUS on the motor cortex (M1) of 16 healthy subjects by probing cortico-cortical excitability and behavior. A low-intensity 500 kHz TUS transducer was coupled to a transcranial magnetic stimulation (TMS) coil. TMS was delivered 10 ms before the end of TUS to the left M1 hotspot of the first dorsal interosseous muscle. Varying acoustic parameters (pulse repetition frequency, duty cycle, and sonication duration) on motor-evoked potential amplitude were examined. Paired-pulse measures of cortical inhibition and facilitation, and performance on a visuomotor task was also assessed. TUS safely suppressed TMS-elicited motor cortical activity, with longer sonication durations and shorter duty cycles when delivered in a blocked paradigm. TUS increased GABAA-mediated short-interval intracortical inhibition and decreased reaction time on visuomotor task but not when controlled with TUS at near-somatosensory threshold intensity.

Influence of haptic guidance in learning a novel visuomotor task

2009 ◽  
Vol 103 (3-5) ◽  
pp. 276-285 ◽  
Author(s):  
Edwin H.F. van Asseldonk ◽  
Martijn Wessels ◽  
Arno H.A. Stienen ◽  
Frans C.T. van der Helm ◽  
Herman van der Kooij
Keyword(s):  
Haptic Guidance ◽  
Visuomotor Task

Activity of neurons in the caudate and putamen during a visuomotor task

Neuroreport ◽  
2008 ◽  
Vol 19 (11) ◽  
pp. 1141-1145 ◽  
Author(s):  
Maria C. Romero ◽  
Maria A. Bermudez ◽  
Ana F. Vicente ◽  
Rogelio Perez ◽  
Francisco Gonzalez
Keyword(s):  
Visuomotor Task

scholarly journals Gaze is driven by an internal goal trajectory in a visuomotor task

2012 ◽  
Vol 37 (7) ◽  
pp. 1112-1119 ◽  
Author(s):  
J. J. Tramper ◽  
A. Lamont ◽  
M. Flanders ◽  
S. Gielen
Keyword(s):  
Visuomotor Task

Parcellation-based modeling of the dorsal premotor area

2020 ◽  
Vol 415 ◽  
pp. 116907
Author(s):  
John R. Sheets ◽  
Robert G. Briggs ◽  
Michael Y. Bai ◽  
Anujan Poologaindran ◽  
Isabella M. Young ◽  
...  
Keyword(s):  
Premotor Area

Functional Properties of Grasping-Related Neurons in the Dorsal Premotor Area F2 of the Macaque Monkey

2004 ◽  
Vol 92 (4) ◽  
pp. 1990-2002 ◽  
Author(s):  
Vassilis Raos ◽  
Maria-Alessandra Umiltá ◽  
Vittorio Gallese ◽  
Leonardo Fogassi
Keyword(s):  
Motor Neurons ◽  
Discharge Rate ◽  
Macaque Monkey ◽  
3 Dimensional ◽  
Premotor Area ◽  
Neuron Response ◽  
Behavioral Paradigm ◽  
Fixation Task ◽  
Object Fixation ◽  
Almost All

We investigated the properties of neurons located in the distal forelimb field of dorsal premotor area F2 of macaque monkey using a behavioral paradigm for studying the neuronal discharge during observation (object fixation condition) and grasping of different 3-dimensional objects with and without visual guidance of the movement (movement in light and movement in dark conditions, respectively). The main result is that almost all studied neurons were selective for both the type of prehension and the wrist orientation required for grasping an object. Three categories of neurons were found: purely motor, visually modulated, and visuomotor neurons. The discharge of purely motor neurons was not affected by either object presentation or by the visual feedback of the hand approaching to and interacting with the object. Visually modulated neurons presented a different discharge in the 2 movement conditions, this determining a decrease in selectivity for the grip and wrist orientation in the movement in dark condition. Visuomotor neurons typically discharged during the object fixation task even in the absence of any grasping movement. Nine of them also displayed a different discharge rate between the 2 movement conditions. Congruence was observed between the neuron response during the most effective type of prehension and the neuron response during observation of the object requiring that particular prehension. These results indicate an important role of F2 in the control of goal-related hand movements.

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