[Morphogenesis of structural elements of the cervical spine in the white rat in prenatal ontogeny].
Embryonal development of the spinal column cervical part has been studied in 100 series of sagittal, transversal, frontal sections; time of the main structural elements anlagen (vertebral bodies, arches, joints, ligaments) is noted. The prenatal development of the spinal column cervical part is divided into 3 stages--mesenchymal, cartilagenous, osseous. The first stage lasts up to 16 days of development; during this period anlagen of vertebral bodies, arches, joints, ligaments are formed. The second stage--cartilagenous; mesenchyma is substituted for cartilagenous tissue, cartilagenous cells are differentiated. This stage lasts from the 16th up to the 18th day of embryogenesis. The third stage--osseous--lasts from the 18th up to the 21st day of embryogenesis. During this period structures of the spinal column cervical part acquire a definitive form, the cartilagenous tissue is substituted for the osseous one.
Borisevich
A I
AI
Komarova
I P
IP
D000818:Animals; D000831:Animals, Newborn; D002574:Cervical Vertebrae / Q000196:embryology*; D005865:Gestational Age; D007403:Intervertebral Disc / Q000196:embryology; D009024:Morphogenesis; D010012:Osteogenesis; D051381:Rats
Morfogenez strukturnykh élementov sheĭnogo otdela pozvonochnika beloĭ krysy v prenatal'nom ontogeneze.