scholarly journals Dexmedetomidine inhibits unstable motor network in patients with primary motor area gliomas

Aging ◽  
2021 ◽  
Author(s):  
Tao Yu ◽  
Songlin Yu ◽  
Zhentao Zuo ◽  
Nan Lin ◽  
Jing Wang ◽  
...  
Keyword(s):  
Motor Area ◽  
Primary Motor Area ◽  
Motor Network

FUNCTIONAL IDENTIFICATION OF THE PRIMARY MOTOR AREA BY CORTICOSPINAL TRACTOGRAPHY

Neurosurgery ◽  
2007 ◽  
Vol 61 (suppl_1) ◽  
pp. ONS-98-ONS-109 ◽  
Author(s):  
Kyousuke Kamada ◽  
Yutaka Sawamura ◽  
Fumiya Takeuchi ◽  
Hideaki Kawaguchi ◽  
Shinya Kuriki ◽  
...  
Keyword(s):  
Motor Area ◽  
Functional Identification ◽  
Primary Motor Area

Recovery from complete hemiplegia following resection of a retrocentral metastasis: the prognostic value of intraoperative cortical stimulation

2001 ◽  
Vol 95 (6) ◽  
pp. 1050-1052 ◽  
Author(s):  
Hugues Duffau
Keyword(s):  
Tumor Resection ◽  
Prognostic Indicator ◽  
Acute Onset ◽  
Motor Area ◽  
Primary Motor Area ◽  
Content Type ◽  
Motor Responses ◽  
Motor Mapping ◽  
Intraoperative Electrical Stimulation ◽  
Fine Print

✓ The goal in this study was to determine if intraoperative electrical stimulation mapping is useful during surgical resection of lesions located in the central region, even in cases of preoperative hemiplegia. This 45-year-old man with a retrocentral metastasis from an embryonal carcinoma of the testis suffered an acute complete hemiplegia after intratumoral bleeding. Emergency surgery was performed with the aid of intraoperative motor mapping despite the preoperative deficit. Cortical stimulations (CSs) elicited motor responses, allowing the detection and hence preservation of the primary motor area during tumor removal. Postoperatively, the patient recovered almost completely within 1 week; the tumor resection was total. It is possible that CSs give an early and valuable prognostic indicator of motor recovery in cases of complete hemiplegia, at least in patients with acute onset and short duration of the deficit. Consequently, if motor responses can be elicited by CSs, it becomes mandatory for the surgeon to respect the primary motor area despite the preoperative hemiplegia, with the aim of preserving the chances of an eventual recovery.

scholarly journals Prediction of recovery from supplementary motor area syndrome after brain tumor surgery: preoperative diffusion tensor tractography analysis and postoperative neurological clinical course

2018 ◽  
Vol 44 (6) ◽  
pp. E3 ◽  
Author(s):  
Kazunori Oda ◽  
Fumio Yamaguchi ◽  
Hiroyuki Enomoto ◽  
Tadashi Higuchi ◽  
Akio Morita
Keyword(s):  
Diffusion Tensor Imaging ◽  
Corpus Callosum ◽  
Supplementary Motor Area ◽  
Diffusion Tensor ◽  
Motor Area ◽  
Primary Motor Area ◽  
Sma Syndrome ◽  
Interhemispheric Connectivity ◽  
Recovery Group ◽  
Diffusion Tensor Imaging Tractography

OBJECTIVEPrevious studies have suggested a correlation between interhemispheric sensorimotor networks and recovery from supplementary motor area (SMA) syndrome. In the present study, the authors examined the hypothesis that interhemispheric connectivity of the primary motor cortex in one hemisphere with the contralateral SMA may be important in the recovery from SMA syndrome. Further, they posited that motor cortical fiber connectivity with the SMA is related to the severity of SMA syndrome.METHODSPatients referred to the authors’ neurological surgery department were retrospectively analyzed for this study. All patients with tumors involving the unilateral SMA region, without involvement of the primary motor area, and diagnosed with SMA syndrome in the postoperative period were eligible for inclusion. Preoperative diffusion tensor imaging tractography (DTT) was used to examine the number of fiber tracts (NFidx) connecting the contralateral SMA to the ipsilateral primary motor area via the corpus callosum. Complete neurological examination had been performed in all patients in the pre- and postoperative periods. All patients were divided into two groups: those who recovered from SMA syndrome in ≤ 7 days (early recovery group) and those who recovered in ≥ 8 days (late recovery group). Differences between the two groups were assessed using the Student t-test and the chi-square test.RESULTSEleven patients (10 men, 1 woman) were included in the study. All patients showed transient postoperative motor deficits because of SMA syndrome. Tractography data revealed NFidx from the contralateral SMA to the ipsilateral primary motor area via the corpus callosum. The mean tumor volume (early 27.87 vs late 50.91 cm3, p = 0.028) and mean NFidx (early 8923.16 vs late 4726.4, p = 0.002) were significantly different between the two groups. Fisher exact test showed a significant difference in the days of recovery from SMA syndrome between patients with an NFidx > 8000 and those with an NFidx < 8000.CONCLUSIONSDiffusion tensor imaging tractography may be useful for predicting the speed of recovery from SMA syndrome. To the authors’ knowledge, this is the first DTT study to identify interhemispheric connectivity of the SMA in patients with brain tumors.

MOVEMENT-RELATED POTENTIALS RECORDED FROM SUPPLEMENTARY MOTOR AREA AND PRIMARY MOTOR AREA

Brain ◽  
1992 ◽  
Vol 115 (4) ◽  
pp. 1017-1043 ◽  
Author(s):  
AKIO IKEDA ◽  
HANS O. LÜDERS ◽  
RICHARD C. BURGESS ◽  
HIROSHI SHIBASAKI
Keyword(s):  
Supplementary Motor Area ◽  
Motor Area ◽  
Primary Motor Area ◽  
Related Potentials

Inhibition of the human primary motor area by painful heat stimulation of the skin

1999 ◽  
Vol 110 (8) ◽  
pp. 1475-1480 ◽  
Author(s):  
Massimiliano Valeriani ◽  
Domenico Restuccia ◽  
Vincenzo Di Lazzaro ◽  
Antonio Oliviero ◽  
Paolo Profice ◽  
...  
Keyword(s):  
Motor Area ◽  
Primary Motor Area ◽  
Heat Stimulation ◽  
Stimulation Of

scholarly journals Young patients with focal seizures may have the primary motor area for the hand in the postcentral gyrus

2007 ◽  
Vol 76 (2-3) ◽  
pp. 131-139 ◽  
Author(s):  
Ateeq Haseeb ◽  
Eishi Asano ◽  
Csaba Juhász ◽  
Aashit Shah ◽  
Sandeep Sood ◽  
...  
Keyword(s):  
Young Patients ◽  
Motor Area ◽  
Primary Motor Area ◽  
Focal Seizures ◽  
Postcentral Gyrus
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