[Reflection of the magnitude of the arm rotation angle by the time parameters of kinesthetic evoked cortical potentials in rhesus macaques]. / Otrazhenie velichiny ugla vrashcheniia ruki vremennými parametrami kinesteticheskikh vyzvannykh potentsialov kory makak rezusov.

The electrophysiological experiments were carried out on five male macaques rhesus under nembutal anesthesia. Kinesthetic evoked potentials in response to arm rotation in the elbow joint were registered in the contralateral primary somatosensory cortex. The data obtained show a significant increase in the duration of kinesthetic potential first positive component with 10 degrees-40 degrees arm rotation amplitude, as compared to 2 degrees rotation. On the contrary, the latent period and amplitude of the component in this stimulation range (2 degrees-40 degrees) were similar. It is suggested that the increase in the arm rotation angle is selectively reflected in the temporary parameters of kinesthetic potential first positive component.

[Centro-peripheral organization of the kinesthetic system studied by natural stimulation of peripheral receptors]. / Izuchenie tsentral'no-perifericheskoi organizatsii kinesteticheskoi sistemy metodom estestvennoi stimuliatsii perifericheskikh retseptorov.

A method is suggested for investigation of the central peripheral organization of the kinesthetic system by nonartefact natural stimulation of the receptors in animals with the aid of a kinesthetic stimulator. The data obtained show the evoked potentials in response to natural stimulation in the contralateral somatosensory cortex of cats to have a significantly shorter latent periods as compared with electric stimulation. It is concluded that the rate of kinesthetic afferent volleys conduction in the somatosensory pathway is higher than that of mixed information during electric stimulation. The method suggested can be used both under experimental and clinical conditions.