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Sacrum - Apex | A Wisdom Archive on Sacrum - Apex | | Sacrum - Apex A selection of articles related to Sacrum - Apex | |
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Sacrum, Sacrum - Apex, Sacrum - Articulations, Sacrum - Base, Sacrum - Dorsal surface, Sacrum - Lateral surface, Sacrum - Pelvic surface, Sacrum - Sexual dimorphism, Sacrum - Variations, Sacrum - Vertebral canal, Bone terminology, Terms for anatomical location
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ARTICLES RELATED TO Sacrum - Apex | | | |  Sacrum - Apex: Encyclopedia II - Sacrum - Pelvic surfaceThe pelvic surface (facies pelvina) is concave from above downward, and slightly so from side to side. Its middle part is crossed by four transverse ridges, the positions of which correspond with the original planes of separation between the five segments of the bone. The portions of bone intervening between the ridges are the bodies of the sacral vertebrae. The body of the first segment is of large size, and in form resembles that of a lumbar vertebra; the succeeding ones diminish from above downward, are flattened from before backwa ...
See also:Sacrum, Sacrum - Pelvic surface, Sacrum - Dorsal surface, Sacrum - Lateral surface, Sacrum - Base, Sacrum - Apex, Sacrum - Vertebral canal, Sacrum - Articulations, Sacrum - Sexual dimorphism, Sacrum - Variations Read more here: » Sacrum: Encyclopedia II - Sacrum - Pelvic surface |
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| | | | Sacrum - Apex: Encyclopedia II - Sacrum - Surfaces
Sacrum - Pelvic surface.
The pelvic surface (facies pelvina) is concave from above downward, and slightly so from side to side.
Its middle part is crossed by four transverse ridges, the positions of which correspond with the original planes of separation between the five segments of the bone.
The portions of bone intervening between the ridges are ...
See also:Sacrum, Sacrum - Surfaces, Sacrum - Pelvic surface, Sacrum - Dorsal surface, Sacrum - Lateral surface, Sacrum - Base, Sacrum - Apex, Sacrum - Vertebral canal, Sacrum - Articulations, Sacrum - Sexual dimorphism, Sacrum - Variations Read more here: » Sacrum: Encyclopedia II - Sacrum - Surfaces |
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| | | | Sacrum - Apex: Encyclopedia II - Sacrum - Variations The sacrum, in some cases, consists of six pieces; occasionally the number is reduced to four. The bodies of the first and second vertebrae may fail to unite.
Sometimes the uppermost transverse tubercles are not joined to the rest of the ala on one or both sides, or the sacral canal may be open throughout a considerable part of its length, in consequence of the imperfect development of the laminae and spinous processes.
The sacrum, also, varies considerably wit ...
See also:Sacrum, Sacrum - Surfaces, Sacrum - Pelvic surface, Sacrum - Dorsal surface, Sacrum - Lateral surface, Sacrum - Base, Sacrum - Apex, Sacrum - Vertebral canal, Sacrum - Articulations, Sacrum - Sexual dimorphism, Sacrum - Variations Read more here: » Sacrum: Encyclopedia II - Sacrum - Variations |
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| | | | Sacrum - Apex: Encyclopedia II - Sacrum - Sexual dimorphism The sacrum is noticeably sexually dimorphic (differently-shaped in males and females).
In the female the sacrum is shorter and wider than in the male; the lower half forms a greater angle with the upper; the upper half is nearly straight, the lower half presenting the greatest amount of curvature. The bone is also directed more obliquely backward; this increases the size of the pelvic cavity and renders the sacrovertebral angle more prominent.
In the male the curvature is more evenly distributed over the whole length of the bone, a ...
See also:Sacrum, Sacrum - Surfaces, Sacrum - Pelvic surface, Sacrum - Dorsal surface, Sacrum - Lateral surface, Sacrum - Base, Sacrum - Apex, Sacrum - Vertebral canal, Sacrum - Articulations, Sacrum - Sexual dimorphism, Sacrum - Variations Read more here: » Sacrum: Encyclopedia II - Sacrum - Sexual dimorphism |
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| | | | Sacrum - Apex: Encyclopedia II - Sacrum - Base The base of the sacrum (basis oss. sacri), which is broad and expanded, is directed upward and forward.
In the middle is a large oval articular surface, the upper surface of the body of the first sacral vertebra, which is connected with the under surface of the body of the last lumbar vertebra by an intervertebral fibrocartilage.
Behind this is the large triangular orifice of the sacral canal, which is completed by the laminae and spinous proces ...
See also:Sacrum, Sacrum - Surfaces, Sacrum - Pelvic surface, Sacrum - Dorsal surface, Sacrum - Lateral surface, Sacrum - Base, Sacrum - Apex, Sacrum - Vertebral canal, Sacrum - Articulations, Sacrum - Sexual dimorphism, Sacrum - Variations Read more here: » Sacrum: Encyclopedia II - Sacrum - Base |
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| | | | Sacrum - Apex: Encyclopedia II - Sacrum - Variations The sacrum, in some cases, consists of six pieces; occasionally the number is reduced to four. The bodies of the first and second vertebrae may fail to unite. Sometimes the uppermost transverse tubercles are not joined to the rest of the ala on one or both sides, or the sacral canal may be open throughout a considerable part of its length, in consequence of the imperfect development of the laminae and spinous processes. The sacrum, also, varies considerably with respect to its degree of curvature.
Most of this copied and pasted from the 1917 Gray's anatomy, which is in the public domai ...
See also:Sacrum, Sacrum - Pelvic surface, Sacrum - Dorsal surface, Sacrum - Lateral surface, Sacrum - Base, Sacrum - Apex, Sacrum - Vertebral canal, Sacrum - Articulations, Sacrum - Sexual dimorphism, Sacrum - Variations Read more here: » Sacrum: Encyclopedia II - Sacrum - Variations |
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| | | | Sacrum - Apex: Encyclopedia II - Sacrum - Vertebral canal The vertebral canal (canalis sacralis; sacral canal) runs throughout the greater part of the bone; above, it is triangular in form; below, its posterior wall is incomplete, from the non-development of the laminae and spinous processes.
It lodges the sacral nerves, and its walls are perforated by the anterior and posterior sacral foramina through which these nerves pass out.
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See also:Sacrum, Sacrum - Surfaces, Sacrum - Pelvic surface, Sacrum - Dorsal surface, Sacrum - Lateral surface, Sacrum - Base, Sacrum - Apex, Sacrum - Vertebral canal, Sacrum - Articulations, Sacrum - Sexual dimorphism, Sacrum - Variations Read more here: » Sacrum: Encyclopedia II - Sacrum - Vertebral canal |
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