If the parts of the skull were not fixed the brain would have much less protection. The spine is partially movable, or we wouldn't be able to bend. If it were fully articulated we would need much stronger muscles to keep us upright.
The Thoracic Spine is the least mobile segment of the spinal column and it contributes to it's share by lengthening dynamically during movement.
It is hopeful that skull has not become detached from the spine as that person would likely be dead. The joint that attaches the spinal column to the skull is called the atlanto-occiptial joint and creates forward and backward movement (flexion and extension). There are also strong ligaments. They can all be injured and if unstable it is possible to fuse to spine to the skull using plate and screws, operating from the back of the head and neck.
If the skull bones had movable joints, it would significantly compromise the structural integrity and protection that the skull provides for the brain. This increased mobility could lead to greater vulnerability to injuries, as the brain would be less shielded from impacts. Additionally, it would disrupt essential functions such as biting and chewing, as the skull's rigidity is crucial for proper alignment of the jaw and teeth. Overall, such a change would likely result in severe consequences for both brain safety and basic physiological functions.
The lower jaw bone (mandible) is the only bone connected to the skull by a freely movable joint, known as the temporomandibular joint (TMJ). This joint allows for actions such as chewing, speaking, and yawning.
There is a bone at the lower and posterior part of the skull called the occipital bone, which, along with the atlas and the axis (the topmost vertebrae) forms the joint connecting the skull and spine. Answer provided by Migue Antonio.-
Yes, it would hurt if you broke your neck, you are breaking a bone that connects your skull to your spine, and has several hundred thousand nerves attached to it.
for one movable pulley you would get a mechanical advantage of 2
Lungs; your ribs and spine would break.
Because your upper jaw is part of your skull which is connected to your spine and your lower jaw is connected to your upper jaw by a hinge type joint that allows you to move your lower jaw so that we can eat. So therefore we cannot move our upper jaw because that would require moving our head which would move our lower jaw too.
Although CDs do not have a spine, a CD Case would. Similar to the spine of a book, the spine would be the narrow vertical back side of the case which includes the hinge thingee... if you partially open the case and view it from the bottom, the spine would be the bottom of the "V".
If there were no freely movable joints in the body, then our bones cannot bend and stretch and we would have become like a statue.
a skull is 'un crâne' in French.