Ultrastructural Observation of Axon Complex of Epithelial Cells after Nerve Implantation into Denervated Fingers of Monkey

The recognition of visual shape in monkeys depends on a multi-layer pathway from primary visual cortex to lower temporal cortex. Visual stimulation is received by retina and then projected to the primary visual cortex VI region through lateral geniculate nucleus. There are a large number of neurons activated by linear stimulation such as short side and line segment. This paper mainly studies the ultrastructural observation of axon complex of epithelial cells after nerve implantation in monkey nerve loss fingers. Through the ultrastructural view of epithelial axon complex, we can master the changes of nerve regeneration function to skin cells and solve the problems caused by nerve defects, this paper mainly studies the method of nerve implantation, uses the neural interface model and the algorithm of nerve electrode, and compares the experiment with the monkey without nerve implantation, and then observe the synaptic ultrastructure under the electron microscope after the experiment to find that nerve implantation can promote the skin sensory organs. The results showed that the repair of sensory cells was faster than that of the skin sensory cells after nerve implantation in the ultrastructures of epithelial axon complex after nerve implantation in monkeys. 90% of the cells implanted with nerve were very fast to repair, which could provide useful information for the study of peripheral nerve regeneration in the nervous system. Nerve implantation regeneration has been a medical research the research focus of the topic,medical researchers hope to find an effective method of nerve implantation for skin cell repir.

Navigation-Guided Transmodiolar Approach for Auditory Nerve Implantation via the Middle Ear in Humans

The aim of this study was to assess the surgical feasibility of a transmodiolar approach via the middle ear cavity for an auditory nerve implantation in humans. In the first part of the study, 6 adult human temporal bones underwent a navigator-guided transmodiolar implantation via the middle ear space after a radical mastoidectomy. In the second part, 122 temporal bone CT scans were analyzed for anatomical parameters relevant to this approach. The nerve implantation was feasible in all temporal bones in laboratory conditions, with a mean target registration error of 0.065 ± 0.0583 mm (n = 6). Evaluation of anatomical parameters on CT scans also supported the feasibility. There was a significant interindividual variation of the modiolar axis and the entry point in relation to visible anatomical landmarks, highlighting the necessity for surgical preplanning.