Read e-book online The Spinal Cord from Gestational Week 4 to the 4th Postnatal PDF

By Shirley A. Bayer, Joseph Altman

ISBN-10: 0849314208

ISBN-13: 9780849314209

ISBN-10: 1420040189

ISBN-13: 9781420040180

This primary quantity within the Atlas of Human principal worried procedure improvement sequence units the level with whole assurance of the spinal wire from gestational week four to the 4th postnatal month. 3D colour photos offer a holistic view of the structural alterations in the course of spinal twine morphogenesis. This landmark first quantity: presents quantitative summaries of numerous ontogenetic tendencies positive factors all of the phases of spinal twine improvement deals clean insights into the stairs focused on the morphogenesis of the mature spinal twine exhibits the human spinal wire at its such a lot primitive level, while consisting in most cases of neuroepithelial stem cells This atlas is additionally to be had as a part of the full 5 quantity sequence.

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Extra resources for The Spinal Cord from Gestational Week 4 to the 4th Postnatal Month (Atlas of Human Central Nervous System Development)

Example text

Dorsal root Sojourn zone of premigratory neurons destined for the dorsal horn Sulcus limitans Expanding dorsal canal Intermediate interneurons at er Depleting ventral interneuron source? Depleted motoneuron source? Active source of glial precursors? Ventral neuroepithelium Floor plate s Ventral white commissure V Large arrows extending from the neuroepithelium indicate migrating neurons. 3376 25 PLATE 10B Roof plate Lateral plate (neuroepithelium, NEP cells) Expanding white matter Dorsal root Spinal canal with expanding dorsal and receding ventral components Expanding gray matter Dorsal root ganglion Floor plate Cellular roof plate Dorsal funiculus Fibrous roof plate Dorsal root collateralization zone Dorsal neuroepithelium Migrating and settling dorsal horn neurons Dorsal root bifurcation zone Lateral cervical nucleus?

Thus, the areal measurements are given only for comparison purposes between levels. Full-page normal contrast photographs of each specimen are in Plates 22A-28A. Low contrast photographs with superimposed labels and outlines of structural details are in Plates 22B-28B. 5, reflecting a rostral-to-caudal gradient in spinal cord maturation, persist in this specimen. The lumbar enlargement is 11% smaller than the cervical enlargement, and the smallest cross-sectional area is at the sacral level. However, the lower thoracic level is 37% smaller than the cervical enlargement and 29% smaller than the lumbar enlargement, reflecting regional size differences characteristic of the adult spinal cord.

Thus, the areal measurements are given only for comparison purposes between levels. Full-page normal contrast photographs of each specimen are in Plates 22A-28A. Low contrast photographs with superimposed labels and outlines of structural details are in Plates 22B-28B. 5, reflecting a rostral-to-caudal gradient in spinal cord maturation, persist in this specimen. The lumbar enlargement is 11% smaller than the cervical enlargement, and the smallest cross-sectional area is at the sacral level. However, the lower thoracic level is 37% smaller than the cervical enlargement and 29% smaller than the lumbar enlargement, reflecting regional size differences characteristic of the adult spinal cord.

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The Spinal Cord from Gestational Week 4 to the 4th Postnatal Month (Atlas of Human Central Nervous System Development) by Shirley A. Bayer, Joseph Altman


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