Head & Neck Flashcards
Where does the deep investing fascia lie?
jaw round the skull down to the clavicle & shoulders
What does the visceral deep fascia cover?
- Trachea
- Oesophagus
- Thyroid gland
- Joins on to the pericardium
What structures are enclosed in the carotid sheath?
- Internal Jugular
- Common carotid
- Vagus nerve
- Internal carotid
What are the different deep fasciae in the neck?
- Deep investing
- Visceral deep
- Carotid sheath
- Prevertebral
What structures are in the prevertebral fascia?
- Spine
- Paraspinal muscles (sternomastoid, weak flexors & extensors)
What are the potential spaces in the neck?
Retropharyngeal
Space between Visceral deep & prevertebral
Where is the parapharyngeal space?
Base of the skull to the hyoid bone
What is the significance of the parapharyngeal space?
Infection from upper teeth & adenoids & tonsils can pass into this space becoming an abscess
What is the significance of the Retropharyngeal space?
Formation of abscess (usually in children) from infection spread from adenoids & teeth.
Can cause airway compromise
What is the significance of the Submandibular space?
- Between mylohyoid & deep investing fascia
- Dental abscess can spread here
- Ludwigs angina involves this space
What is the function of sternomastoid?
Singly rotate head
Together extend the head
What is the function of the supra hyoid muscles?
Elevating the hyoid as part of swallowing
What is the function of the infra hyoid muscles?
Involved in swallowing and depressing the larynx
Where is the isthmus of the thyroid?
Below cricothyroid membrane
Where does the thyroid attach?
2nd & 3rd tracheal rings
How many tracheal rings are there?
C shaped- incomplete
15-20 rings
Where do the cervical sympathetic nerves leave the spine?
T1-L2
How do sympathetic nerves travel?
In the walls of arteries
How does sympathetic flow go to the neck?
Travels through 3 ganglia
What are the places a Horner’s syndrome can arise?
- Spinal cord (syringomyelia)
- Root level (brachial plexus)
- Ganglion (penetrating trauma)
- Lung apex (pan coast tumour)
- Carotid artery (aneurysm)