Functional MR Imaging of the Motor Cortex in Active and Passive Movement: Qualitative and Quantitative Changes

✓ Functional magnetic resonance (MR) imaging was performed using a 1.5-tesla MR system to localize sensorimotor cortex. Six neurologically normal subjects were studied by means of axial gradient-echo images with a motor task and one or more sensory tasks: 1) electrical stimulation of the median nerve; 2) continuous brushing over the thenar region; and 3) pulsed flow of compressed air over the palm and digits. An increased MR signal was observed in or near the central sulcus, consistent with the location of primary sensory and motor cortex. Four patients were studied using echo planar imaging sequences and motor and sensory tasks. Three patients had focal refractory seizures secondary to a lesion impinging on sensorimotor cortex. Activation seen on functional MR imaging was coextensive with the location of the sensorimotor area determined by evoked potentials and electrical stimulation. Functional MR imaging provides a useful noninvasive method of localization and functional assessment of sensorimotor cortex.

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Delayed feedback of somato-motor cortex activations modulates finger tapping results in real-time functional MR Imaging

Klinische Neurophysiologie ◽

10.1055/s-2006-939146 ◽

2006 ◽

Vol 37 (01) ◽

Author(s):

J Gawehn ◽

G Vucurevic ◽

P Dellani ◽

P Urban ◽

P Stoeter

Keyword(s):

Motor Cortex ◽

Mr Imaging ◽

Real Time ◽

Delayed Feedback ◽

Finger Tapping ◽

Functional Mr Imaging

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Functional MR Imaging of the Primary Motor Area in Patients with Brain Tumors of the Motor Cortex : Evaluation with Echo-planer Imaging on a Clinical 1.0 T MR Imager

Japanese Journal of Neurosurgery ◽

10.7887/jcns.7.222 ◽

1998 ◽

Vol 7 (4) ◽

pp. 222-229 ◽

Cited By ~ 1

Author(s):

Yoshie Hara ◽

Mitsugu Nakamura ◽

Norihiko Tamaki ◽

Kazumasa Ehara ◽

Junji Kitamura

Keyword(s):

Motor Cortex ◽

Brain Tumors ◽

Mr Imaging ◽

Motor Area ◽

Primary Motor Area ◽

Functional Mr Imaging

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Persistent mirror movements: functional MR imaging of the hand motor cortex.

Radiology ◽

10.1148/radiology.203.2.9114119 ◽

1997 ◽

Vol 203 (2) ◽

pp. 545-552 ◽

Cited By ~ 49

Author(s):

G L Leinsinger ◽

D T Heiss ◽

A G Jassoy ◽

T Pfluger ◽

K Hahn ◽

...

Keyword(s):

Motor Cortex ◽

Mr Imaging ◽

Mirror Movements ◽

Functional Mr Imaging

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Activation of the motor cortex in patients with mirror movements evaluated with functional MR imaging

NeuroImage ◽

10.1016/s1053-8119(96)80397-1 ◽

1996 ◽

Vol 3 (3) ◽

pp. S395

Author(s):

G.L. Leinsinger ◽

D. Heiss ◽

R. Toms ◽

A. Danek ◽

K. Hahn

Keyword(s):

Motor Cortex ◽

Mr Imaging ◽

Mirror Movements ◽

Functional Mr Imaging

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Sensory motor cortex: correlation of presurgical mapping with functional MR imaging and invasive cortical mapping.

Radiology ◽

10.1148/radiology.190.1.8259434 ◽

1994 ◽

Vol 190 (1) ◽

pp. 85-92 ◽

Cited By ~ 255

Author(s):

C R Jack ◽

R M Thompson ◽

R K Butts ◽

F W Sharbrough ◽

P J Kelly ◽

...

Keyword(s):

Motor Cortex ◽

Mr Imaging ◽

Cortical Mapping ◽

Sensory Motor ◽

Functional Mr Imaging ◽

Presurgical Mapping

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Functional Mr Imaging at 1.5 T

Acta Radiologica ◽

10.1177/028418519303400121 ◽

1993 ◽

Vol 34 (1) ◽

pp. 101-103 ◽

Cited By ~ 10

Author(s):

O. Henriksen ◽

H. B. W. Larsson ◽

P. Ring ◽

E. Rostrup ◽

A. Stensgaard ◽

...

Keyword(s):

Blood Flow ◽

Motor Cortex ◽

Mr Imaging ◽

Preliminary Investigation ◽

Capillary Blood ◽

Detectable Change ◽

Gradient Echo ◽

Functional Mr Imaging ◽

Echo Time ◽

Stimulation Of

A preliminary investigation of the effects of stimulation of the visual and the motor cortex was made on a conventional 1.5 T MR imaging scanner. Both types of activation gave a detectable change in the signal between rest and stimulation using a gradient echo sequence with an echo time of 60 ms. The observed effects were assumed to be caused by variation in the amount of paramagnetic deoxyhemoglobin between stimulation and rest due to local increase of capillary blood flow in the human brain during stimulation.

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