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Titolo:
DIFFERENTIATION OF RECEPTIVE-FIELDS IN THE SENSORY CORTEX FOLLOWING STIMULATION OF VARIOUS NERVES OF THE LOWER-LIMB IN HUMANS - A MAGNETOENCEPHALOGRAPHIC STUDY
Autore:
SHIMOJO M; KAKIGI R; HOSHIYAMA M; KOYAMA S; KITAMURA Y; WATANABE S;
Indirizzi:
NATL INST PHYSIOL SCI,DEPT INTEGRAT PHYSIOL OKAZAKI AICHI 444 JAPAN NATL INST PHYSIOL SCI,DEPT INTEGRAT PHYSIOL OKAZAKI AICHI 444 JAPAN
Titolo Testata:
Journal of neurosurgery
fascicolo: 2, volume: 85, anno: 1996,
pagine: 255 - 262
SICI:
0022-3085(1996)85:2<255:DORITS>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSTERIOR TIBIAL NERVE; SOMATOSENSORY EVOKED-POTENTIALS; CEREBRAL MAGNETIC-FIELDS; SCALP TOPOGRAPHY; PARADOXICAL LATERALIZATION; RESPONSES;
Keywords:
SOMATOSENSORY EVOKED POTENTIAL; MAGNETOENCEPHALOGRAPHY; POSTERIOR TIBIAL NERVE; SURAL NERVE; PERONEAL NERVE; FEMORAL NERVE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
M. Shimojo et al., "DIFFERENTIATION OF RECEPTIVE-FIELDS IN THE SENSORY CORTEX FOLLOWING STIMULATION OF VARIOUS NERVES OF THE LOWER-LIMB IN HUMANS - A MAGNETOENCEPHALOGRAPHIC STUDY", Journal of neurosurgery, 85(2), 1996, pp. 255-262

Abstract

The authors investigated magnetoencephalography following stimulationof the posterior tibial (PT) and sural (SU) nerves at the ankle, the peroneal nerve (PE) at the knee, and the femoral nerve (FE) overlying tile inguinal ligament in seven normal subjects (14 limbs) and confirmed its usefulness in clarifying the detailed differentiation of the receptive fields in the lower limb area of the primary sensory cortex inhumans. The results were summarized as follows: 1) the equivalent current dipoles (ECDs) estimated by the magnetic fields following stimulation of the PT and Sri were located very close to each other, along the interhemispheric fissure in all 14 limbs. They were directed horizontally to the hemisphere ipsilateral to the stimulated nerve, 2) The ECD following stimulation of the FE was clearly different from that seenin the other nerves, in terms of the location and/or direction, in all 14 limbs. The ECDs of 14 limbs were classified into two types according to the distance of ECD location between PT and FE; Type 1 (> 1 cm,nine limbs) and Type 2 (< 1 cm, five limbs). The ECD following FE stimulation was located on the crown of the postcentral gyrus or at the edge of the interhemispheric fissure in Type 1 and was close to the ECDs following PT and SU stimulation along the interhemispheric fissure in Type 2. 3) The ECD following PE stimulation was located along the interhemispheric fissure in all 14 limbs as for PT and SU. Its location was slightly but significantly higher than that of PT and SU in Type 1and was close to ECDs following PT and SU stimulation in Type 2. The present findings indicated that approximately 65% (nine of 14) of the limbs showed the particular receptive fields compatible with the homunculus. Large inter- and the intraindividual (left-right) differences found in the present study indicated a significant anatomical variationin the area of the lower limb in the sensory cortex of humans.

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Documento generato il 12/07/20 alle ore 06:31:23