All You Need To Know About Vertebras.
These movements occur near the muscles. M. ilio-psoas is (Online Pharmacy Without Prescription) attached to the bodies as the individual beams and the transverse appendages of vertebras from D I to L IV; closing the intervertebral holes and nerves watching out of these, the muscle descends into a small basin at the level of the horizontal branch of the pubic bone forms a tendon, which is attached to a small saliva thigh.
When extremities are fixed trunk forward flexion is made with this muscle(bilateral reduction), with a stationary body, it bends the hip. M. quadratus himborum lies behind the previous one and starts from the XII rib and transverse appendages of lumbar vertebras; its bottom tendon is attached to the lig. Ilio Jumbale and scallops of ilium. Muscle tilts the torso to the side and rotates it inside a little bit. Bending the body back is made by longitudinal muscles of the back.
Of the other muscles that are topographically related to the sciatic nerve, these should mention as follows. A) pear (m. piriformis), coming from the front surface of the sacrum. It emerges from the pelvis with a narrow end, through large sciatic hole, dividing the latter into two parts, and is attached to the greater trochanter femur. B) Obturator one (mm. obtu-ratorii int. Et ext.), the first of which starts from the edge of the oval openings, mostly from the descending branch of the pubic bone, obturator membrane and through a small hole out of the sciatic pelvis, attached to the bottom of fossae trochantericae thigh. Upper edge of this muscle, together with the horizontal branch of the pubic bone forms the slit. The channel for passage of nerves and blood vessels is composed of this slit, and with the hole in the obturator membrane so as with the slit in the outer obturator muscle. The latter is located outside the obturator membrane, starting and attaching the same place and the internal sphincter. C) Gluteal muscles (mm. glutaei) starts from the edge of the sacrum, the coccyx and the posterior surface of the ilium and is attached to the greater trochanter of the hip.
The inner wall of the sacral canal, as well as that of the entire vertebral one, is covered with periosteum (the outer layer of the dura mater), which is adjacent to the dura mater. The latter merges with the periosteum in the front of the channel, and in the side and rear parts forms space with it (epidural), filled with connective and fatty tissue. Venous plexus of a series of venous rings is located in this space. The rings correspond to the segments of the spine and are interconnected with anastomosis.
Dural sac, ending with the blunt end at the level of I-II sacral vertebras, is covered with the inner side by the arachnoid (arachnoidea), which forms a closed sac (subarachnoid space), filled with cerebrospinal fluid. Spinal cord, weighted by special ligaments in the subarachnoid space, ends at the level of I-II of the lumbar vertebrae. The final part of this space (cisterna terminalis) contains nerve roots, gradually going through the intervertebral holes.
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