In details

Bones of human skull



Bones of the human skull: protection for the brain

Introduction

The brain is responsible for commanding the whole functioning of the organism through circuits involving thousands of neurons. And beyond all the physiology involved, the integrity of such a structure, guaranteed by a bone structure, is required.

A set of bones, which make up the skull box, is responsible for protecting the entire brain mass.

What they are and general characteristics

In all, they consist of 22 bones, 8 of which are essentially involved with brain protection. The others are bones of the face.

Together, all of these structures form a cavity that will house the brain. So it is as if all bones form a protective "shell".

These are all small bones that articulate through sutures, which will be discussed below.

What are the bones and location

The bones with the essential function of protecting the brain are eight:

- Ethmoid: is located anteriorly.

- Sphenoid: its shape is compared to that of a bat, and has function in the articulation and passage of structures.

- Temporal: two, each on one side, inferior to the parietal bones.

- Front: As the name suggests, it is located in the anterior portion of the skull.

- Parietals: are two, and are located laterally and posteriorly.

- Occipital: It is located posteriorly, and its function is to integrate other bones.

In addition to these, there are others that form the face, such as jaws, palatines, zygomatics, and more.

What are your structures

The bones of the skull are to be expected to be complex because they receive (and also emit) a series of nerves, vessels, and other structures.

Initially, for one bone to articulate with another, there are sutures. Although they are present throughout the skull, three of them stand out:

- Lambdoid suture: separates the parietal and occipital bones.

Sagittal suture: This is a continuation of the anterior, and if analyzed from the upper view, "divides" the skull into two parts.

- Coronal suture: separates the frontal bones from the parietal ones.

Other processes are intrinsic to bones, and their function is the passage of various structures: the foramina. Among them, we can mention:

- foramen magnum: there is passage of the bulb, meninges, blood vessels, accessory nerve, and others.
- Round foramen: trigeminal nerve (V cranial pair).

- Spinous foramen: median meningeal artery.

Main functions

- Define a rigid structure;

- Protect the brain;

- Support and protect the other structures involved with the brain;

- Shaping the face along with the possibility of muscle insertion.

Curiosity

The "molter" (fontanelle) closes over time, and is present in the part to allow the passage of the baby's head in the maternal vaginal canal. Calcification occurs even in the first years of life!