07/05/2024
Cervical spine
The cervical spine consists of the first seven vertebrae at the top of the spine. These vertebrae are the smallestTrusted Source in the vertebral column. They are known as C1–C7. People may also refer to C1 as the atlas and C2 as the axis.
This segment of the spine spans from the base of the skull to the upper chest. The vertebrae in the cervical spine make up the bones of the neck.
A person’s cervical spine has a slight curve. This allows the neck to support the weight and movement of a person’s head. It is also flexible, allowing a person to turn their head and neck in many directions.
Thoracic spine
The thoracic spine is the longest segment of a person’s spine. It spans from the upper chest to the middle of the back. There are 12 vertebrae in the thoracic spine, known as T1–T12.
This segment of the spine connects the cervical spine to the lumbar spine. It is also the only part of the spine attached to the rib cage.
The thoracic spine is important for stability. It also helps protect a person’s spinal cord and provides an attachment site for the ribs.
Lumbar spine
A person’s lumbar spine is in the lower back and consists of five vertebrae, known as L1–L5. These vertebrae are the largest bones in the spine.
The lumbar spine supports most of the weight of the upper body. Activities like heavy lifting or sitting down for too long may affect the health of this part of the spine.
The NSHF notes that pain in this region is the most common cause of disability that prevents a person from working as a result of back pain.
Sacrum
The sacrum is the base of a person’s spine. It consists of five vertebrae that fuse to form one bone. These bones, known as S1–S5, fuse together during adolescence.
This segment of the spine connects to a person’s pelvis. It helps transfer an individual’s body weight to the pelvis. This stabilizes the pelvis and helps with walking, standing, and other load-bearing activities.
The sacrum also helps protect the spinal nerves in the lower back.
Coccyx
The coccyx is a small, triangular bone of three to five fused vertebrae. This bone sits below the sacrum. People may also refer to it as the tailbone.
This part of the spine provides an attachment area for different muscles, ligaments, and tendons in the pelvic region. It also helps distribute a person’s body weight while sitting down.
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颈椎
颈椎由位于脊柱顶部的前七节椎骨组成。这些椎骨是脊柱中最小的椎骨，被称为C1–C7。人们也可能把C1称为“枢椎”，C2称为“枢轴”。
颈椎部分从颅底延伸到上胸部。颈椎中的椎骨构成了颈部的骨骼。
一个人的颈椎有轻微的曲线。这使得颈部能够支撑头部的重量和运动。它也很灵活，使得一个人可以将头部和颈部转向许多方向。
胸椎
胸椎是一个人脊柱的最长部分。它从上胸延伸到背部中部。胸椎有12个椎骨，被称为T1–T12。
脊柱的这个部分将颈椎连接到腰椎。它也是脊柱与肋骨连接的唯一部分。
胸椎对于稳定性至关重要。它还有助于保护一个人的脊髓，并为肋骨提供附着点。
腰椎
一个人的腰椎位于下背部，由五个椎骨组成，称为L1–L5。这些椎骨是脊柱中最大的骨骼。
腰椎支撑着上半身的大部分重量。像举重或长时间坐下这样的活动可能会影响这部分脊柱的健康。
NSHF指出，这个区域的疼痛是最常见的导致因背痛而导致一个人无法工作的残疾原因。
骶骨
骶骨是一个人脊柱的基础。它由五个椎骨融合成一块骨头。这些椎骨在青春期期间融合在一起，称为S1–S5。
这个脊柱部分连接到一个人的骨盆。它有助于将个人的体重转移到骨盆。这稳定了骨盆，并有助于行走、站立和其他负重活动。
骶骨还有助于保护下背部的脊神经。
尾骨
尾骨是由三到五个融合的椎骨组成的一个小三角形骨头。这个骨头位于骶骨下方。人们也可能称之为“尾骨”。
这部分脊柱为骨盆区域的不同肌肉、韧带和肌腱提供了一个附着区域。它还有助于在坐下时分配一个人的体重。
source: medicalnewstoday.com/articles/spine-anatomy
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