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On 56 preparations of the spine of the fetuses and adults, which had no diseases associated with the pathology of the spinal column in the anamnesis, the structure, quantitative anatomy and topography of the connective tissue structures of the epidural space in its various parts were studied using histological and anatomical methods. For the first time, a reasonable classification of the structural components of the connective tissue structures of the epidural space (simple trabeculae, simple plates, complex trabecular complexes, complex lamellar complexes, combined complexes and ligaments) is presented. Their morphological features are described. These structures are distributed by size (long and narrow, short and wide, intermediate) and by location (parietal and central). A quantitative assessment of the central epidural structures in different parts (cervical, thoracic, lumbar and sacral) within the same segment of the epidural space is presented. The ligaments of the dura mater (anterior, lateral, posterior) have been studied. The connective tissue structures of various shapes and localizations together constitute the concept of the stroma of the epidural space of the spinal cord. The stromal elements in quantitative composition differ significantly in different parts of the spinal canal.
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Keywords: epidural space, connective tissue stroma, structure, dura mater of spinal cord