Talk:Gastrointestinal Tract - Mouth Development: Difference between revisions
(Created page with " ==2001== Ann Anat. 2001 Nov;183(6):511-8. Prenatal development of the muscles in the floor of the mouth in human embryos and fetuses from 6.9 to 76 mm CRL. Radlanski RJ1, Ren...") |
mNo edit summary |
||
| Line 1: | Line 1: | ||
==2001== | ==2001== | ||
===Prenatal development of the muscles in the floor of the mouth in human embryos and fetuses from 6.9 to 76 mm CRL=== | |||
Ann Anat. 2001 Nov;183(6):511-8. | Ann Anat. 2001 Nov;183(6):511-8. | ||
Radlanski RJ1, Renz H, Tabatabai A. | Radlanski RJ1, Renz H, Tabatabai A. | ||
Abstract | Abstract | ||
The development of the muscles in the floor of the mouth is described in 10 human embryos and fetuses ranging from 6.9 to 76 mm CRL by means of computer-aided graphical 3D-reconstructions. All primordia of the muscles in the floor of the mouth could be identified from the 15.6 mm CRL stage on. The proportions and insertion lines of the early muscles were found to be different from adult anatomy. Each muscle first inserted in the medial surface of Meckels cartilage, but during the developmental period between 19 and 68 mm CRL the insertion lines were gradually transposed to the bony ridges of the mandible which progrediently embraced Meckels cartilage. The fibers of the mylohyoid muscles left the anterior region near the symphysis mentalis free during all stages of this study. The digastric muscle revealed only one belly with a constriction of its continuous fibers where it passed the hyoid bone primordium. There was no attachment of digastric muscle fibers to the hyoid; only geniohyoid and mylohyoid fibers. Geniohyoid and genioglossus muscles basically correspond to their definite arrangement, but they underwent proportional changes. Individual specimens embodied irregularities such as accessory geniohyoid and hyoid portions and muscle fibers separate from the mylohyoide muscle. | The development of the muscles in the floor of the mouth is described in 10 human embryos and fetuses ranging from 6.9 to 76 mm CRL by means of computer-aided graphical 3D-reconstructions. All primordia of the muscles in the floor of the mouth could be identified from the 15.6 mm CRL stage on. The proportions and insertion lines of the early muscles were found to be different from adult anatomy. Each muscle first inserted in the medial surface of Meckels cartilage, but during the developmental period between 19 and 68 mm CRL the insertion lines were gradually transposed to the bony ridges of the mandible which progrediently embraced Meckels cartilage. The fibers of the mylohyoid muscles left the anterior region near the symphysis mentalis free during all stages of this study. The digastric muscle revealed only one belly with a constriction of its continuous fibers where it passed the hyoid bone primordium. There was no attachment of digastric muscle fibers to the hyoid; only geniohyoid and mylohyoid fibers. Geniohyoid and genioglossus muscles basically correspond to their definite arrangement, but they underwent proportional changes. Individual specimens embodied irregularities such as accessory geniohyoid and hyoid portions and muscle fibers separate from the mylohyoide muscle. | ||
PMID 11766522 | PMID 11766522 | ||
==1996== | ==1996== | ||
Revision as of 15:59, 28 April 2016
2001
Prenatal development of the muscles in the floor of the mouth in human embryos and fetuses from 6.9 to 76 mm CRL
Ann Anat. 2001 Nov;183(6):511-8.
Radlanski RJ1, Renz H, Tabatabai A.
Abstract
The development of the muscles in the floor of the mouth is described in 10 human embryos and fetuses ranging from 6.9 to 76 mm CRL by means of computer-aided graphical 3D-reconstructions. All primordia of the muscles in the floor of the mouth could be identified from the 15.6 mm CRL stage on. The proportions and insertion lines of the early muscles were found to be different from adult anatomy. Each muscle first inserted in the medial surface of Meckels cartilage, but during the developmental period between 19 and 68 mm CRL the insertion lines were gradually transposed to the bony ridges of the mandible which progrediently embraced Meckels cartilage. The fibers of the mylohyoid muscles left the anterior region near the symphysis mentalis free during all stages of this study. The digastric muscle revealed only one belly with a constriction of its continuous fibers where it passed the hyoid bone primordium. There was no attachment of digastric muscle fibers to the hyoid; only geniohyoid and mylohyoid fibers. Geniohyoid and genioglossus muscles basically correspond to their definite arrangement, but they underwent proportional changes. Individual specimens embodied irregularities such as accessory geniohyoid and hyoid portions and muscle fibers separate from the mylohyoide muscle.
PMID 11766522
1996
Development of the submandibular gland and its closer neighboring structures in human embryos and fetuses of 19-67 mm CRL
Ann Anat. 1996 Dec;178(6):509-14.
Guizetti B1, Radlanski RJ.
Abstract The fetal development and arrangement of the human submandibular gland was studied by means of serial sections of human embryos and fetuses ranging from 19 mm to 67 mm CRL. Computer assisted 3-dimensional reconstruction leads to the following observations: 1. The orifice of the submandibular duct is located in the medial paralingual sulcus. 2. There is evidence that the extension and location of WHARTON's duct is influenced by the surrounding structures. 3. The surface of the submandibular gland primordium shows impressions of the neighboring structures. 4. The glandular tissue is encapsulated in condensed mesenchyme. PMID 9010566
Ann Anat. 1996 Dec;178(6):503-8.
Development of the parotid gland and its closer neighboring structures in human embryos and fetuses of 19-67 mm CRL
Guizetti B1, Radlanski RJ.
Abstract
The fetal development of the human parotid gland was studied by means of serial sections of human embryos and fetuses ranging from 19 mm to 67 mm CRL. Analysis of computer assisted 3-dimensional reconstructions and anatomical drawings leads to the following observations: 1. The parotid gland anlage is found at the most lateral and cranial point of the sulcus buccalis. 2. The location of the orifice of the parotid duct is dependent upon the developmental processes of the fetal skeleton. 3. The anlagen of anatomical structures dominating the parotid bed in the adult are found prior to the enlargement of the parotid gland. 4. The surface of the parotid gland shows impressions of the surrounding structures. 5. There is no evidence that the parotid gland is subdivided into two lobes by the facial nerve. PMID 9010565
