Name: 頸部深筋膜 (Deep Fascia of the Neck)
Uploaded: 2021-01-14T08:06:07.000Z
Duration: 13 min
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Hi Students, today we will be studying about
the Anatomy of the Neck. This is Dr Yusuf

and these are the specific objects
which are followed in the College of

Medicine, Al Jouf University. The first
object is - Describe fasciae of the neck

The second one is enumerate the
structures in the anterior median plane of

the neck from above downwards.
Third is, mention the actions and nerve

supply of sternocleidomastoid muscle,
mention its relations and clinical

importance. Fourth is outline the triangles
of the neck and list the contents of

each. Fifth is identify the super hyoid as
well as the infrahyoid muscles and give

their actions and nerve supply. So these
are some of the objectives which we'll

discuss one by one. To begin with - if you
see the neck, neck is a very important

structure through which the lower part
of the body will be in connection with

the head and neck.  So a lot of
structures will be entering from the, the

lower part from the thoracic region to
the head and neck and many structures will

be descending downwards from the head
and neck into the thoracic region and

this connection is very important here
and this is confined to a very small

area called as the neck. Before we discuss
about the neck itself will be discussing

em when we reflect the skin and
superficial fascia, there is a very

important fascia, deep fascia called as the deep cervical fascia of the neck which is also

called as Fascia Colli. This the fascia which
covers all the structures of the neck

and give us an additional support as
well as covering so to defy it is a

facial which invests the muscles of the
neck and fills up the

interval between muscles, vessels and
cervical

viscera.  So it's a fascia which invests the
muscles of the neck so it covers totally

the muscles of the neck, gives protection
to that, gives an additional support and

fills the interval between muscles, vessels & cervical viscera. So it covers

the structure separately the vessels and
cervical viscera which are there like the

trachea itself, the esophagus, the thyroid gland.  All these are covered by a special

facial which is called as the deep cervical facial of the neck.  It has three layers or three

parts, one is called at the investing
layer of the deep cervical fascia which is

the outermost covering. So if you
see here in this picture this is how it

looks like to be more precise will go to
the next picture here if you can see

here this is the cross section of the
neck seen from above and you can see

here the the blue colored line, just below
the skin and the platysma muscle here

there is a deep fascia, this is .. this blue line is called as investing layer

of deep cervical fascia. It is covering
the whole of the neck as well as it is

giving extra support as well as covering the muscles here, both in the

anterior part as well as the posterior part.
Here if you see the sternocleidomastoid

muscle, behind it is the trapezius muscle.
So it covers on either side of these

Ok, so this fascia which is outer most of
the three fascias, which covers the

whole of the neck. This is the investing
layer of of deep cervical fascia. The

second fascia is called as the pre-tracheal fascia which is in front of the

trachea, so that's why it is called as pre-tracheal, it can be much more clearly

seen in this picture the cross-section
where it is around the trachea, this is the

trachea here and here is the esophagus and these are the two lobess of the

thyroid gland and around that there is a
fascia which is covering, this is called

as the pre-tracheal fascia, because it is
in front

of the trachea so it is called as pre, pre means front. So pre-tracheal

fascia which covers the, not only in the
front of the trachea but also on sides as well

behind, not only the trachea itself but also
the thryoid glands, esophagus and other

structures. Then the third fascia which is there which is around the vertebras is called

as the pre-vertebral because it is in front
of the vertebras. In this picture, if you

see here these are the vertebras, this is
the spinal cord and in front of that you

can see that is a fascia which is called as the prevertebral fascia.  To be more precise

in this picture is much more clear. Here
you can see the the vertebral column and

this is the spinal cord inside and
around that there are important muscles

surrounding this vertebral column
itself and all the whole of this

structures, the muscles, the vertebra
itself, the spine cord, everything is covered by a

additional fascia around all these
structures and this is called as the pre

vertebral fascia. So its mentioned here the
pre-vertebral, this pink line this is

the pre-vertebral fascia.  This orange line
this is the pre-tracheal fascia and

this is the investing layer of the deep
cervical fascia.  These are the fascias which

are around the neck and covering very
important structures in the neck. Along with

that there is an additional fascia which
covers some very important structures

especially if you can see here, this is
the fascia and it covers very important

such as like the common carotid artery. So
that's why it is called carotid sheath

because it covers the
common carotid artery as well as its

terminal branches - the external and internal carotid arteries, especially the internal carotid.

Then this is the internal jugular vein and here is the vagus nerve. There are

three important structures within the
carotid sheath, there is a common character

and its branches, terminal branches.  This
is the internal jugular vein and the

are covered by a special covering,
this is called as the carotid sheath. This is also

part of the deep cervical fascia. So all these fascia are the part of the deep cervical

fascia of the neck which is also called
the Fascia Colli. So these fasciae will

divide the whole of neck into
compartments, one is called the visceral

compartment, Viscera means the organs
like the pretracheal as well as the

prevertebral fascia where there are
important structures like the trachea, esophagus,

thyroid gland and other structures so
because these fasciae... this part of the

fascia will be covering important
structures there, the organs (visceras) so

that's why it is called as the pre.....
this is called the visceral compartment.

So this is a visceral compartment where
the importance visceras like esophagus, trachea

thyroid gland and here the vertebral
column itself, the spinal cord, the

muscles. So all these, the pre-vertebral
and pre-tracheal fascia will be

called as visceral compartment. There is
also a very important component is called

as the Neuro-vasacular compartment. Neuro means nerves and the vascular means vessels the

arteries and the veins. So this is in case
in case of the carotid sheath where it is covering

very important neurovascular components
neuro is the nerve i.e., is the Vagus nerve

here and the vascular that is the artery
and vein, the common carotid artery as well

as the internal jugular vein.  All these
structures are covered by a separate

part of the deep cervical fascia. So this will
divide this into a separate

Ok, so this is called as the neuro-vascular 
compartment inside which the carotid

sheath where the internet carotid artery,
the internal jugular vein and the vagus nerve are

So some of the important functions of
the fascia of the neck have been mentioned here

first of all it acts as a covering and
also as a protective barrier, after the

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頸部深筋膜 (Deep Fascia of the Neck)

structure

common

bacteria

barrier