Differentiation of receptive fields in the sensory cortex following stimulation of various nerves of the lower limb in humans: a magnetoencephalographic study.
Differentiation of receptive fields in the sensory cortex following stimulation of various nerves of the lower limb in humans: a magnetoencephalographic study.
复制标题
刺激人类下肢各种神经后感觉皮层感受野的分化：脑磁图研究。
DOI：
10.3171/jns.1996.85.2.0255
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发表时间：
1996
影响因子：
4.1
通讯作者：
S. Watanabe
中科院分区：
文献类型：
--
作者：
M. Shimojo;R. Kakigi;M. Hoshiyama;S. Koyama;Y. Kitamura;S. Watanabe
作者研究了7名正常受试者（14条肢体）在刺激踝关节的胫后神经（PT）和腓神经（PE）以及覆盖在腹股沟韧带上的股神经（FE）后的脑磁图，并证实了其在阐明人类下肢初级感觉皮质区感受野的详细分化方面的有用性。结果表明：1)经PT和SU刺激后得到的等效电流偶极子（ECDs）分布非常接近，且均沿脑裂方向分布。它们被水平定向到受刺激神经的同侧半球。2)在所有14个肢体中，FE刺激后的ECD在位置和/或方向上都与其他神经明显不同。将14个肢体的ECD根据其位置与手术前的距离分为两类；1型（小于1厘米，9条肢体）和2型（小于1厘米，5条肢体）。在1型中，FE刺激后的ECD位于中央后回的顶部或半球间裂的边缘，而在2型中，FE刺激后的ECD接近PT和SU刺激后沿半球间裂的ECD。3)与PT和SU相比，PE刺激后的ECD位于14个肢体的半球间裂，其位置略高于1型PT和SU，但显著高于2型PT和SU刺激后的ECD，接近2型PT和SU刺激后的ECD。目前的研究结果表明，大约65%（14个肢体中的9个）的肢体显示出与侏儒相匹配的特殊感受野。本研究中发现的个体之间和个体内部（左右）的巨大差异表明，人类下肢感觉皮层区域存在显著的解剖学差异。
The authors investigated magnetoencephalography following stimulation of the posterior tibial (PT) and sural (SU) nerves at the ankle, the peroneal nerve (PE) at the knee, and the femoral nerve (FE) overlying the 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 in humans. The results were summarized as follows: 1) the equivalent current dipoles (ECDs) estimated by the magnetic fields following stimulation of the PT and SU 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 seen in 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 1 and 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 variation in the area of the lower limb in the sensory cortex of humans.
影响因子：
3.5
作者：
SARVAS, J
通讯作者：
SARVAS, J