Effects of unilateral voluntary movement on motor imagery of the contralateral limb.
Summary of "Effects of unilateral voluntary movement on motor imagery of the contralateral limb."
To investigate whether unilateral voluntary movement affects voluntary drive of motor imagery for the contralateral limb.
The subjects were asked to maintain the left index-finger movements with different directions (abduction and adduction, 5% of maximum voluntary contraction; MVC) and with different force levels (10% and 25% MVC). Under these conditions, transcranial magnetic stimulation was applied over the left motor cortex to record motor evoked potential (MEP) from the right first dorsal interosseous muscle with or without motor imagery of the right index-finger abduction.
Voluntary movement of the left index finger with isodirection, but not mirrored direction, to the imagined movement reduced the MEP enhancement induced by motor imagery. MEP was gradually increased depending on increment of the force level on the left side, while the motor imagery-induced MEP enhancement was consequently reduced.
Enhancement of the motor cortex excitability driven by motor imagery of the contralateral limb is interfered with by isodirection and forceful movement of the ipsilateral limb, which may be due to an increase in the transcallosal inhibitory effects.
Using motor imagery as a therapeutic tool, the voluntary movements on the other side of the body should be taken into account.
Department of Physiology, Graduate School of Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan; Center for Advanced Practice and Research of Rehabilitation, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 7
This article was published in the following journal.
Name: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20800539
- DOI: http://dx.doi.org/10.1016/j.clinph.2010.07.024
Medical and Biotech [MESH] Definitions
The use of mental images produced by the imagination as a form of psychotherapy. It can be classified by the modality of its content: visual, verbal, auditory, olfactory, tactile, gustatory, or kinesthetic. Common themes derive from nature imagery (e.g., forests and mountains), water imagery (e.g., brooks and oceans), travel imagery, etc. Imagery is used in the treatment of mental disorders and in helping patients cope with other diseases. Imagery often forms a part of HYPNOSIS, of AUTOGENIC TRAINING, of RELAXATION TECHNIQUES, and of BEHAVIOR THERAPY. (From Encyclopedia of Human Behavior, vol. 4, pp29-30, 1994)
Epilepsy, Partial, Motor
A disorder characterized by recurrent localized paroxysmal discharges of cerebral neurons that give rise to seizures that have motor manifestations. The majority of partial motor seizures originate in the FRONTAL LOBE (see also EPILEPSY, FRONTAL LOBE). Motor seizures may manifest as tonic or clonic movements involving the face, one limb or one side of the body. A variety of more complex patterns of movement, including abnormal posturing of extremities, may also occur.
Molecular Motor Proteins
Proteins that are involved in or cause CELL MOVEMENT such as the rotary structures (flagellar motor) or the structures whose movement is directed along cytoskeletal filaments (MYOSIN; KINESIN; and DYNEIN motor families).
Cyclical movement of a body part that can represent either a physiologic process or a manifestation of disease. Intention or action tremor, a common manifestation of CEREBELLAR DISEASES, is aggravated by movement. In contrast, resting tremor is maximal when there is no attempt at voluntary movement, and occurs as a relatively frequent manifestation of PARKINSON DISEASE.
The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior.
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