Only mobility happening at the thoracic spine is rotation because of which we can rotate our trunk backward while moving our lower limbs. So, it forms a strong cage, hence the mobility is very less.
So, each vertebra is attached to one rib on the right and left side and in front, these ribs are attached with the sternum bone. This is the least mobile and most stable part of the spine. This part of the spine has kyphosis, that is, bent forward. It is present at the opposite of the chest wall. That means, it is a cervical vertebra but behaves like thoracic vertebrae (explained below). Now the last, that is, the 7th vertebra is actually a transitional vertebra. Rest 3rd, 4th, 5th, 6th vertebrae make the rest of the 50 % of movements.
Almost 50 % of our head movements are because of them. The unique feature of these two vertebrae is that these are very mobile and there is no disc between them. The 2nd vertebra is connected to the first vertebra and is responsible for “no” or side to side movement.
The 1st vertebra is connected to the skull and is responsible for nodding or “yes” movement. This part of the spine has lordosis, that is, bent backward. So, in the cervical spine, we have 7 vertebrae. In every spine, there are a certain number of vertebrae, which are bones and they are arranged like a stack. So normally, when we tell the doctor that “I have cervical,” then we must understand that it is not a problem, but the name of a normal part of the spine.
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