[Pathophysiological features of dorsalgia development among railway workers, connected with railway communication].

Dorsalgia's is an actual medical and social problem. It gains prominent significance among railway workers, connected with railway communication. Pain syndromes among this group of patients have different complex pathogenetic mechanisms of the development.

[Axonopathy in the pathogenesis of multiple sclerosis, peripheral diffuse and local motor neuropathies and motor neuron disease].

Two hundreds and seventy-six patients including 43 patients with multiple sclerosis, 24 - with acute inflammatory demyelinating polyneuropathy (AIDP), 144 - with chronic inflammatory demyelinating polyneuropathy (CIDP), 27 - with motor multifocal neuropathy (MMN), 38 - with lateral amyotrophic sclerosis (LAS) have been examined. Symptoms of axonal degeneration, manifested in denervation phenomena in both clinical and instrumental studies (electromyography, transcranial magnetic stimulation, MRT), were revealed in all groups of patients. The formation of excitation conduction blocks is an universal pathophysiological mechanism of the axonopathy development in AIDP, CIDP, MMN and LAS.

[Differential diagnosis of multifocal motor neuropathy and related diseases].

Multifocal motor neuropathy (MMN) is a rare disease of the peripheral nervous system pathogenetically related to local demyelinization and formation of excitation conduction blocks. MMN affect only those nerves and their segments that comprise excitation conduction blocks. Such blocks have a persistent character and show a mosaic pattern over motor fibres which accounts for the specific clinical picture of MMN.

[Mechanisms of development of secondary axonal failure in diffuse and local demyelinating neuropathies].

To estimate a qualitative and quantitative effects of axonal failure on the clinical and electromyographic (EMG) picture of diffuse and local demyelination, 24 patients with Guillain-Barre syndrome (GBS), 144 with chronic inflammatory demyelinating polyneuropathy (CIDP) and 27 patients with multifocal motor neuropathy (MMN) have been studied. All the patients underwent a complex clinical neurological and EMG examination. Along with significant association between muscular hypotrophies and weakness in the majority of patients (tau=0,51; p<0,001), in some cases weakness in extremities was found in the absence of amyotrophic syndrome specifying a "functional" axonopathy due to the disturbance of ionic transport and the blockade of potassium channels.

[Therapeutic effect of dexalgin on disturbances of vertebrogenic and nonvertebrogenic mechanisms in back pain].

To evaluate the effect of Dexalgin on dysregulation mechanisms in the complex therapy of dorsalgia, 39 patients have been studied. They were divided into 2 groups: with vertebrogenic (23 patients) and without vertebrogenic (16 patients) pain syndrome. Dexalgin was prescribed in dosage 75 mg daily during 5 days.