Thoracic flexion, a rapid forward flexion at the waist, can elicit a circumferential electrical sensation in some patients with multiple sclerosis. The clinical and radiographic features of this phenomenon are described here. This symptom is typically a sensory band around the T6-T7 dermatomes and is usually associated with recent thoracic cord lesions. It is clinically independent of cervical pathology and Lhermitte's sign. Similar to the vertical radiation of symptoms upon neck flexion due to cervical cord lesions, this sign may help localize MS plaques to the thoracic cord, even when thoracic MRI is negative.

中文翻译：

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胸椎屈曲引起环周感觉迟钝：MS 中胸索病变的一个症状

胸椎屈曲，即腰部快速向前屈曲，可在一些多发性硬化症患者中引起周向电感。此处描述了这种现象的临床和放射学特征。这种症状通常是 T6-T7 皮节周围的感觉带，通常与最近的胸索病变有关。它在临床上独立于宫颈病理学和 Lhermitte 征。类似于由于颈髓病变引起的颈部屈曲症状的垂直辐射，即使胸部 MRI 为阴性，该体征也可能有助于将 MS 斑块定位到胸索。