Session 1 Flashcards
How many cervical fascia are there?
- Superficial cervical fascial layer
- 4 Deep cervical fascial layer
Where can the superficial cervical layer be found?
It is found just below the skin and largely contains adipose
What can be found within the superficial cervical layer?
- External jugular vein
- Cutaneous nerves
- Superficial lymph nodes
- Platysma
- Fat
- Superficial blood vessels
What are the 3 layers of the deep cervical fascia from superficial to deep?
From superficial to deep
- Investing layer
- Carotid sheath
- Pre tracheal layer
- Pre vertebral layer
Which fascial layer encloses the sternocleidomastoid, trapezius, submandibular and parotid salivary glands?
Investing layer
Where does the retropharyngeal space lie?
Pre-vertebral layer of fascia and the fascia surrounding the pharynx.
What are the complications of an infection that develops in the retropharyngeal space?
Can potentially spread from the neck into the thorax as far down as the posterior mediastinum risking development of a mediastinitis
What are the main muscle group of the face?
- Muscles of facial expression
- Muscles of mastication
Which nerves supplies all of the muscles of mastication?
-Mandibular division of the trigeminal nerve
Which nerve supplies the muscles of fascial expression and superficial muscle of neck and chin?
-Facial nerve
What is Bell’s palsy?
Inflammation of the facial nerve causing facial paralysis
What are the main muscles of the neck?
- Platysma
- Sternocleidomastoid
- Trapezius
- Suprahyoids: attach to the hyoid and above it
- Infrahyoids: attach to the hyoid bone and below it
What nerve supplies the muscles of the neck?
-Cranial nerves
What is the action of platysma muscle?
Depresses corners of the mouth
Contraction assists in depression of the mandible
What is the nerve supply of the platysma muscle?
Facial Nerve
What are the attachments of the sternocleidomastoid?
- Arises from the sternum and clavicle
- Inserts into the mastoid process
What is the action of the sternocleidomastoid?
- Contraction results in lateral flexion of the neck towards the side of the contraction
- Both muscles contracting bring the skull forward or flexion of the neck
What can be used to examine the sternocleidomastoid?
Put hand on the patients neck and ask them to look over their shoulder
What is the nerve supply of the sternocleidomastoid?
Accessory nerve
What is the action of the trapezius?
Contraction causes the shoulder to be shrugged.
What can be used to test the accessory nerve?
Shrug against resistance to test damage to nerve that supplies the trapezius
What are the borders of the anterior triangle?
Superiorly: inferior border of the mandible
Laterally: Medial border of the sternocleidomastoid
Medially: Imaginary saggital line down the midline of the body
What are the borders of the posterior triangle?
Anterior: Posterior border of the sternocleidomastoid
Posterior: Anterior border of the trapezius muscle.
Inferior: Middle 1/3 of the clavicle.
What does inserting surgical airways carry the risk of?
Infection of the pre tracheal space
What do muscles of the fascial expression do?
Act as sphincters and dilators. Attach to bone and the skin/fascia of the face