Functional Localization of Motor Processes in the Primary and Supplementary Motor Areas

Lang, Wilfried; Höllinger, Peter; Eghker, A; Lindinger, G.

doi:10.1097/00004691-199407000-00003

Cited by 41 publications

(18 citation statements)

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“…1). Location and orientation of each dipole are consistent with the assumption that they reflect intracellular, surface-to-depth current flow in the anterior bank of the central sulcus of each hemisphere (area 4; MI; for review: [20]). The two dipoles explained 92% of the variance of the observed data at movement onset.…”

Section: Meg-studiessupporting

confidence: 62%

“…Evidence from EEG studies is indirect. It is based on the assumption that hemispheric asymmetry of brain potentials in C3/C4 with movement execution is caused by MI-activity which is larger contralateral than ipsilateral to the performing hand (for a review see [20]). But the possibility cannot be excluded that adjacent parts of the cortex, e.g.…”

Section: Discussionmentioning

confidence: 99%

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Electric and magnetic fields of the brain accompanying internal simulation of movement

Lang¹,

Cheyne

Höllinger³

et al. 1996

Cognitive Brain Research

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Methods of functional brain imaging have been used to identify brain structures which are active during internal simulation of movements (ISM). Between 1977 and 1993 it was consistently reported that the primary motor cortex (MI) is not active during ISM whereas other cortical areas, in particular the supplementary motor area (SMA) are active. ISM was assumed to be a situation of 'internal programming'. Brain systems involved in ISM or 'programming' were hypothesized to be superior to and separable from 'executive system' including MI. We have studied electric and magnetic fields of the brain when subjects internally simulated either a single movement or a sequence of movements. Results of the studies are consistent with the assumption that MI is active with ISM. Internally subjects experienced effort which was required to inhibit overt movements during ISM. A recent EEG study showed different patterns of cortical activity with ISM and with movement inhibition suggesting that different brain structures may be active during ISM and movement inhibition [23].

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Section: Meg-studiessupporting

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Electric and magnetic fields of the brain accompanying internal simulation of movement

Lang¹,

Cheyne

Höllinger³

et al. 1996

Cognitive Brain Research

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“…The most probable side of the required response was indicated by one (Lang et al 1994), the event-related lateralizations of the EEG are depicted from cue onset until 550 ms after target onset. It is obvious that the target event-related lateralizations (ERLs) might be still influenced by the cue ERLs.…”

Section: Discussionmentioning

confidence: 99%

“…4). Since such tactile asymmetries are assumed to be inverted in polarity (Wascher & Wauschkuhn, 1996), most probably due to surfaceto-depth current flow in pyramidal tract neurons in the somatosensory cortex (Lang, Ho¨llinger, Eghker, & Lindinger, 1994), their influence led to reversed effects in the target PCN, which cannot account for the behavioral effects.…”

Section: Eeg Parametermentioning

confidence: 99%

Intentional pre-cueing does not influence the Simon effect

Buhlmann

Wascher

2005

Psychological Research

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Choice reactions can be performed more quickly if the response corresponds spatially to the stimulus, even when the stimulus location is irrelevant for the task (Simon effect). It is assumed that the Simon effect is related to interference between spatial stimulus and response codes in a response selection stage. A central finding for such a response selection account is the increase in the effect if the most probable response location is given in advance by an intentional pre-cue. However, Hasbroucq and Possamaı¨(1994) assumed that the increase in the Simon effect in such a task may be due to an unmeant pre-cueing of the stimulus location, which has been recently supported by an electroencephalography (EEG) study by Wascher and Wolber (2004). In the present study this notion has been tested experimentally. In Experiment 1, a centrally presented symbolic cue served as an intentional cue. As a result, the enhancement of the Simon effect in valid cueing almost disappeared. When tactile cues were used (Experiment 2), the increase in the Simon effect disappeared completely. Thus, the influence of intentional cueing reported in previous studies can be assigned to attentional factors and does not support a response selection account.

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“…As an early example, we would like to address two articles by W Lang, Obrig, Lindinger, Cheyne, and Deecke (1990) and W Lang, Cheyne, Kristeva, Lindinger, and Deecke (1991). Both papers focus on the functional localization of cortical processes linked to controlled motor activity.…”

Section: Sample Studiesmentioning

confidence: 99%

Slow potential topography

Bauer

1998

Behavior Research Methods, Instruments, & Computers

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Functional Localization of Motor Processes in the Primary and Supplementary Motor Areas

Cited by 41 publications

References 0 publications

Electric and magnetic fields of the brain accompanying internal simulation of movement

Electric and magnetic fields of the brain accompanying internal simulation of movement

Intentional pre-cueing does not influence the Simon effect

Slow potential topography

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