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Overall, sacral vertebrae problems are not common in horses. However, it is possible for the sacral vertebrae to become fractured, dislocated or infected, all of which can compress the pelvic limb spinal nerves that run through the sacral vertebrae.
S1-5. These nerves enter through the sacral or pelvic vertebrae.
sacral crest
The fifth lumbar vertebra articulates with the first fused sacral vertebra of the pelvic girdle.
As far as the hips are concerned, the pelvic girdle is in the center. The pelvic "bone" in general is composed of many different fused bones, like the ilium or pubis. Attached to the pelvis is the lower sacral vertebrates known as the sacrum, also called the tailbone.
The sacrum is both the mechanical weight bearing base of the spinal column and the fused central posterior section of the pelvic girdel. The is defined as, one of three bones (sacrum and two pelvic bones) that make up the pelvic ring; consists of five fused sacral vertebrae.
the sacral hiatussacral hiatus
coccyx-the remains of the tail cervical-support the neck (lift, bend and turn the head) sacral- fused to pelvic, base of trunk and legs lumbar- allow twisting and turning, provide attachment for back muscles thoracic-short floating ribs
cervical region: neck Thoracic region: back Lumbar region: lower back sacral region: pelvic girdle Coccyxgeal region: tailbone
Peripheral neurons are bundled together to make up the 31 pairs.Each pair of nerves is named for the vertebra from which it exits. S1-5. These nerves enter through the sacral or pelvic vertebrae.
The five vertebrae that are fused within the pelvic bones are the sacral vertebrae, as well as a few vestigal caudal vertebrae that are called the coccyx in humans.
Cervical,thoracic and lumbar,sacral vertebrae.If we extend the list to include all bones near back then,skull(occipital bone),scapula,pelvic bones(ischium,ileum)