Neck Flashcards
Name this layer
Epidermis
Name this layer
Dermis
Name this layer
Superficial fascia
Name this layer
Deep fascia
how is deep fascia organised?
in tubes that run from the base of the skull and the top of the thorax (superior mediastinum)
why is it important that fascia is organised in deep tubes?
they help to prevent spread of infection from one compartment to another
- An infection in the neck tends to spread within a single fascial tube
superficial neck fascia is composed of?
adipose connective tissue
where is superficial neck fascia located between?
the skin and the underlying deep fascia
Usually a thin layer in the neck
superficial neck fascia contains what 4 things
- Sensory nerves
- Platysma muscles (facial expression)
- Superficial veins
- Lymphatic vessels and superficial lymph node - cant be seen in dissection
The sensory nerves in the superficial fascia of the neck are known as
the cervical plexus
what does plexus mean?
intertwining of structures
What sensory nerves give rise to the cervical plexus?
Anterior rami of cervical spinal nerves C2, C3 &C4
the anterior ramus of the spinal chord relays what kind of information?
sensory
The anterior ramus of the spinal cord relays sensory information from and to what?
the anterolateral body wall towards the spinal chord
What structures does the action potential pass through to get sensory information from the anterolateral body wall to the spinal cord? 4 things
Anterior ramus
spinal nerve
posterior root into posterior rootlets
spinal chord
what is the dermatome map?
map of the areas of the body supplied by a specific spinal nerve
The anterior rami of cervical spinal nerves C2-C4 is sensory to skin of where 3 things?
- Neck
- Shoulder
- Corner of the face
Sensory nerves leave the skin and superficial fascia, to get to the spinal chord they have to?
Pierce the deep fascia
What are the 4 named branches of the cervical plexus?
- Great auricular nerve
- Transverse cervical nerve
- Lesser occipital nerve
- Supraclavicular nerves
The great auricular nerve is formed by the anterior rami of which spinal nerves?
C2 & C3
The transverse cervical nerve is formed by the anterior rami of which spinal nerves?
C2 & C3
The lesser occipital nerve is formed by the anterior rami of which spinal nerves?
C2
The supraclavicular nerves are formed by the anterior rami of which spinal nerves?
C3 &C4
which nerve is this?
great auricular nerve C2&C3
which nerve is this?
transverse cervical nerve C2&C3
which nerve is this?
lesser occipital nerve C2
which nerve is this?
supraclavicular nerves C3&C4
Great auricular nerve supplies
the skin over the parotid gland, external ear and posterior auricular region
Transverse cervical nerve supplies
Anterolateral neck
Lesser occipital nerve supplies
posterior aspect of the neck
Supraclavicular nerves supplies
area over the clavicle to the tip of the shoulder
Green dashed line represents
the cervical plexus
the cervical plexus passes from
superficial towards deep structures