The spine is made up of 33 vertebrae. Each of them is distributed among five regions: the cervical region, the dorsal region, the lumbar region, the sacrum and the coccyx.
The vertebrae present in the spine
As we mentioned in the previous paragraph, the human body can have 33 vertebrae and each of them will be divided into five regions or large groups.
Regions in which the vertebrae are distributed:
– The cervical region: 7 vertebrae (C1 to C7)
– The dorsal region: 12 vertebrae (T1 to T12)
– The lumbar region: 5 vertebrae (L1 to L5)
– The region of the sacrum: 5 vertebrae (S1 to S5)
– The coccyx region: 4 vertebrae (Co1 to Co4, inconsistent)
The cervical, dorsal and lumbar vertebrae are independent (free) and enjoy a certain mobility, while the vertebrae of the sacrum and the coccyx are welded together, forming two bones: the sacrum and the coccyx. This is why they are not mobile.
Functions of the different vertebrae
We are now going to give you a brief explanation of the main function that the vertebrae perform in the human body, depending on the region to which they belong, corresponding to the classification that we presented to you in the previous paragraph.
– The cervical vertebrae allow flexion, extension, twisting and rotation of the head.
– The dorsal vertebrae are primarily designed to allow rotation of the torso.
– The lumbar vertebrae mainly allow the movement of forward flexion and backward extension of the torso, but also lateral flexion. They have a small rotation capacity.
– The vertebrae of the sacrum have the main function of transmitting the weight of the body to the belt of the pelvis.
– The coccyx vertebrae serve as support for many muscles and ligaments.
What is the spine?
The vertebral column, located on the middle and posterior part of the trunk, is the main supporting structure of the skeleton. It protects the spinal cord and allows humans to move while standing without losing their balance.
The spine starts from the head (which it supports) and goes to the pelvis (to which it provides support). In total, the spine of an adult measures 70 cm in men and 60 cm in women, approximately.
It has four curvatures that give it an elongated “S” or sinusoidal shape. Curvatures cervical et lumbar are concave, posteriorly, while the curvatures thoracic et you sacrum are concave, posteriorly.