Dinaburg A D
Zh Nevropatol Psikhiatr Im S S Korsakova. 1978;78(8):1185-9.
The author describes 2 symptoms of elective lesions of the hand muscles: one of the central genesis, the other--peripheral, vegetative. The first symptom is characterized by a weakening of volar and dorsal interossal muscles of the hand in an increased electrical activity, which is beyond the weakened muscles. It is due to a lesion of filogenetically new cortico-spinal path, adjacent to the pyramidal and participating in the innervation of the muscles of the distal parts of extremities. The second symptom is "the symptom of the fifth finger", which is characterized by a selective weakening and decreased electrogenesis of the muscles in the fifth finger--abductor, adductor and the flexor brevis. Due to this it is likely caused by the activation of beta2-adrenoreceptors in the neuromuscular synapse, evoked by the irritation of cervical sympathical nodes and seen in degenerative changes of the cervical intravertebral discs, isolated cervical sympathalgia and toxico-infectious vegetative-vascular processes, especially hypothalamic.
一种是中枢性的，另一种是外周性、植物神经性的。第一种症状的特点是手部掌侧和背侧骨间肌在电活动增强的情况下变弱，且这种电活动超出了变弱的肌肉范围。这是由于与锥体束相邻且参与肢体远端肌肉神经支配的系统发生学上较新的皮质脊髓通路受损所致。第二种症状是“小指症状”，其特点是小指的肌肉——外展肌、内收肌和短屈肌选择性变弱且电发生减少。因此，它可能是由颈交感神经节受刺激诱发的神经肌肉突触中β2 - 肾上腺素能受体激活引起的，见于颈椎间盘退变、孤立性颈交感神经痛和中毒性感染性植物神经血管过程，尤其是下丘脑相关的情况。
