The Intraneural Plexus of Fasciculi and Fibers in the Sciatic Nerve

Abstract

But if the incision cuts into the nerve ju t above the point of ongm of a branch the signs of complete division of that branch are produced. In certain ituations also-for example, in the anterior primary division of "the fifth cervical nerve-the nen•e fiber are arranged in a well-defined order, and incomplete division of this nerve may entail complete •division of those motor fiber which supply the spinati and the deltoid muscles. Again, in the trunk 3. ~farie, P.: Des resultats fournis par l'electrisation directe des troncs nerveux clan la plaie operatoire chez !es hie ses atteints de traumatismes des nerfs, Bull. de l'Acad. de med.

Human distal sciatic nerve fascicular anatomy: Implications for ankle control using nerve-cuff electrodes

“…This pattern was observed in all three specimens, and was consistent with McKinley's study [17], though the latter had the DF and SF grouped together (Figure 3). Sunderland and Ray's tracing of the common fibular was detailed in the distal nerve, but the fascicles became intermixed more proximally, making functional grouping impossible [18], and hence was not shown for comparison.…”

“…These results from three specimens expand our current knowledge from two previous specimens [17][18]. The fascicular anatomy and morphology prove conducive to selective activation of ankle musculature and the generation of balanced dorsiflexion and plantarflexion with multicontact nerve-cuff electrodes.…”

“…This is shown in Figure 5, which also includes a sample harvested by McKinley [17] showing similar fascicular organization. Sunderland and Ray's tracings did not maintain separate, functionally distinct groups in any sections proximal to the joint space [18] and are not shown for comparison.…”

“…The fascicular anatomy of two human sciatic nerves has been examined by McKinley [17] and Sunderland and Ray [18]. However, these studies do not provide adequate detail to allow nerve-cuff design.…”

“…Groups of fascicles going to the tibial, common fibular, DF, and SF nerves were later identified and traced. Tracing distances of these fascicular groups with respect to specified landmarks were tabulated and compared across three nerves and compared to results reported by McKinley [17].…”