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The vertebral column, also known as the spinal column, spine or backbone, is the core part of the axial skeleton in vertebrate animals.The vertebral column is the defining and eponymous characteristic of the vertebrate endoskeleton, where the notochord (an elastic collagen-wrapped glycoprotein rod) found in all chordates has been replaced by a segmented series of mineralized irregular bones ...
The spinal cord and the brain work together, making them the key components of the central nervous system. [5] Damage to this system affects specific functions of the body, primarily relating to the function of muscles. The areas most commonly injured include the cervical vertebrae (C1-C7), and the lumbar spine (L1-L5). [6]
The spinal nerves arise from the spinal column. The top section of the spine is the cervical section, which contains nerves that innervate muscles of the head, neck and thoracic cavity, as well as transmit sensory information to the CNS. The cervical spine section contains seven vertebrae, C-1 through C-7, and eight nerve pairs, C-1 through C-8.
superior part of mental spine of mandible (symphysis menti) dorsum of tongue, body of hyoid: lingual artery: hypoglossal nerve [CNXII] protrudes tongue: 2 3 genioglossus, middle fibers head, tongue (left/right) superior part of mental spine of mandible (symphysis menti) dorsum of tongue, body of hyoid: lingual artery: hypoglossal nerve [CNXII ...
The long thoracic nerve arises from the anterior rami of cervical spinal nerves C5, C6, and C7. [1] [2] [3] The root from C7 may occasionally be absent. [4] The roots from C5 and C6 pierce through the scalenus medius, while the C7 root passes in front of the muscle. [citation needed]
They are also known as the sacrospinalis group of muscles. These muscles lie on either side of the spinous processes of the vertebrae and extend throughout the lumbar, thoracic, and cervical regions. The erector spinae is covered in the lumbar and thoracic regions by the thoracolumbar fascia, and in the cervical region by the nuchal ligament.
This is the segmental organization of its cervical, thoracic, lumbar, and sacral components, which is arranged from most medial to most lateral respectively. The pathway crosses over at the level of the spinal cord, rather than in the brainstem like the dorsal column-medial lemniscus pathway and lateral corticospinal tract.
In the thoracic region, the thoracolumbar fascia consists of a single layer - an upward extension of the posterior layer of the lumbar fascia, becoming progressively thinner before fading out above the 1st rib, replaced by the splenius muscle. [3] In the thoracic region, it forms a thin fibrous fascial covering for extensor muscles associated ...
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