- [Voiceover] On the fetal skull,
we have a few unique structures
that can only be seen here.
First off, this is the anterior side,
so if we look at the anterior surface,
can see it looks very similar to what
an adult skull looks like, but
there are some notable differences.
First off, this right here, between
the frontal bone and parietal bones,
this is going to be
your anterior fontanel.
If you go towards the back of the skull,
you're gonna see you have
your posterior fontanel,
between the parietal and occipital bones.
On the side of the skull,
we have two fontanels.
One is your anterior
lateral, anterior front,
lateral side, or also know
as the sphenoidal fontanel,
and then we have the posterior lateral,
or also known as the mastoid fontanel.
Now the fontanels are all gonna be,
all four of them, are gonna be soft spots
where the bones have not fully formed.
So the anterior fontanel is going
between the frontal and parietal.
Posterior fontanel is between
the parietal and occipital.
The anterior lateral, or sphenoidal,
is between the frontal, temporal,
and where the sphenoid bone would be,
and then the posterior
lateral, or the mastoid,
is between the parietal,
occipital, and temporal.
The last structure that
gonna be unique here,
is going to be this
suture, which is called
the metopic suture.
It's actually splitting, or
right through the middle,
of the frontal bone, so it's sometimes
also known as the frontal suture.
So right here, the frontal
suture, or the metopic suture.
