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Photomicrographs of 7Mot cross-sections showing motoneurons retrogradely labelled with HRP conjugate and counterstained with neutral red. Injected muscles: A, platysma; B, orbicularis oris; C, buccinator; D, zygomaticus; E, auricularis superior; F, orbicularis oculi (inferior portion); G, orbicularis oculi (superior portion); H, frontalis. The orientation arrows and the scale bar are valid for all photomicrographs.
