## 1 Introduction  
It can be assumed that the overload accompanying the work of a high-maneuver jet fighter pilot may lead to changes in the biomechanics of the spine and cause changes in the transmission of nerve impulses in the fibers of the spinal roots. Moreover, it can be a source of pathological, generalized changes in peripheral nerve fiber conduction, and changes in the function of muscle motor units by neurogenic and/or overload origins. Additional expected clinical symptoms of the pathology may be a pain in the cervical and lumbosacral spine, sensory disturbances, or decreased muscle strength. Only a few papers describe the effectiveness of treatment of the mentioned pathologies in military aviators, with only a few kinestheticnequretic methods that minimize the risk of abnormalities in the nervous and muscular systems [1]. Considering the G overloading influence, it can be supposed that there may be a maximum value beyond which the severity of pain does not increase. However, the intensity of exposure to overload is responsible for the stronger pain in the neck [2]. The literature describing the pathologies in high-maneuvering jet fighters focuses mainly on the cervical spine level. [PERSON] and co-workers point to persistent high overload forces and changes in head position resulting in musculoskeletal pathologies [3]. The combination of a tight cockpit where the pilot is sitting and works while wearing a helmet increases the loading and may cause acute or chronic pain in the spine and upper extremities [4]. The fact of loading by the auxiliary pilot's equipment becomes essential; there are night-vision goggles or the helmet signaling system. Such devices are the most commonly reported cause of neck pain [5]. [PERSON] considers that the exposure of the jet military fighter to overloading can cause pain in the cervical spine, reduces the pilot's efficiency, and cause acute or chronic diseases [6]. [PERSON] and co-workers demonstrated the phenomenon of muscle fatigue, mainly innervated from the cervical spine, and increasing the risk of spine injury, thus reducing the effectiveness of air missions [7]. In their research, the muscle's strength and the muscle's motor unit activity decreased with the number of air maneuvers performed by the pilot. It has not been entirely explained the real cause of muscle pathology, the phenomenon of overload, or the secondary effects of damage to the nerve structures [8]. Most of the studies conducted so far used clinical assessment methods of pain intensity increase or muscle strength decline, based mainly on subjective questionnaire assessment [9]. These studies show that high-maneuvering jet fighters report severe pain after the flight; therefore, there is a growing concern about their operational ability [10]. The possibility of a correlation between age or the time of flying hours and the intensity of lumbosacral back pain was also underlined. Activities such as sitting and standing are also reported to be the most painful, relieved after stretching kinesotherapy exercises [11]. Few studies describe the use of clinical neurophysiology techniques, including electromyography (EMG) to assess the activity of the muscles of the neck and upper or lower extremities, associated with increased activity during aerobatics or flight control [12]. Diagnostic tests of clinical neurophysiology used in the presented study are performed to confirm or deny the clinical diagnosis of the presence of pathological symptoms in the muscular system and abnormal transmission of nerve impulses in the central and peripheral nervous systems. Electroneurography (ENG) or motor-evoked potential induced with the magnetic field (MEP) studies were never or casuistically utilized in the evaluation of the health status of the high-maneuvering jet fighters. In cases where there are no obvious structural pathologies in the ultrasound image or high-resolution neuroimaging (computed tomography or magnetic resonance imaging), these tests may highlight the functional nature of the abnormality.