Structure of the human skull
The skull is one of the most complex structures of the musculoskeletal system. It consists of 22 bones, which form two functional sections: the brain and the facial. Each bone has a unique shape, and together they create a strong yet surprisingly lightweight structure to protect the brain and senses.
Brain section: protection of the main organ
The cranial vault is formed by four bones: the frontal, two parietals and the occipital. They are connected by sutures - immobile fibrous joints that are not yet closed in newborns (fontanelles). It is thanks to the fontanelles that the baby's head can become slightly deformed as it passes through the birth canal.
The base of the skull is a more complex area. Here are the sphenoid and temporal bones, as well as the ethmoid bone. Cranial nerves, arteries and veins pass through numerous openings at the base. The largest of them is the foramen magnum (foramen magnum), through which the spinal cord connects to the brain.
Facial region: support for the senses
The facial skull is formed by 14 bones, including the upper and lower jaws, zygomatic, nasal, lacrimal bones and vomer. The only movable bone of the skull is the lower jaw (mandibula), which connects to the temporal bone through the temporomandibular joint.
The upper jaw contains the maxillary sinus - the largest of the paranasal sinuses. Inflammation of the sinus mucosa (sinusitis) is one of the most common ENT pathologies, and understanding the anatomy of the sinus is critical for diagnosis and treatment.
Topography: three cranial fossae
The inner surface of the base of the skull is divided into three fossae:
- Anterior cranial fossa - the frontal lobes of the brain lie here
- Middle cranial fossa - contains the temporal lobes and pituitary gland (in the sella turcica)
- Posterior cranial fossa - contains the cerebellum and brainstem
Knowledge of the topography of the cranial fossae is necessary for neurosurgeons when planning surgical approaches and interpreting CT and MRI images.
Why is it important to study the anatomy of the skull
Understanding the structure of the skull is the basis for many medical specialties. Dentists work with the upper and lower jaws, otolaryngologists - with the paranasal sinuses and temporal bone, neurosurgeons - with the arch and base. Even cosmetologists are required to know the location of bone landmarks for safe injections.
Modern 3D atlases, such as Humio], allow you to view each bone of the skull from all angles, turn off neighboring structures and literally look inside - something that was previously only possible in the anatomical theater.