What are the main functions of the cranium in the human body?
The cranium's main functions are to protect the brain, house and support sensory structures such as the eyes and ears, provide attachment points for facial and jaw muscles, and contribute to the shape and structure of the head.
What bones make up the human cranium?
The human cranium is made up of eight bones: the frontal bone, two parietal bones, two temporal bones, the occipital bone, the sphenoid bone, and the ethmoid bone.
What are common conditions or injuries that affect the cranium?
Common conditions or injuries affecting the cranium include skull fractures, traumatic brain injuries, craniosynostosis, and bone diseases such as Paget's disease. Infections like osteomyelitis and tumors, whether benign or malignant, can also impact the cranial structures.
How does the cranium change from infancy to adulthood?
The cranium undergoes significant changes from infancy to adulthood. In infancy, the cranium is composed of several bones connected by sutures and fontanelles, allowing for brain growth and skull expansion. As a person matures, the bones gradually fuse, sutures close, and the fontanelles harden, forming a solid, protective adult skull.
How does the cranium protect the brain?
The cranium protects the brain by providing a hard, bony enclosure that shields it from impact and injury. It absorbs and disperses force away from the brain during trauma, minimizing the risk of damage. Additionally, its structure supports and stabilizes the brain within the skull.