5: Triangles and Fascia Of The Neck Flashcards
Subq layer of fascia: location
Between dermis and investing layer of deep cervical fascia
Contents of the subq layer of fascia
Sensory N’s, blood vessels, lymph vessels, superficial LNs, fat, platysma
What N innervates platysma
Facial N
Three things enclosed in investing fascia
SCM, trapezius, parotid glands, submandibular glands
Superficial veins relation to investing fascia
Overlay investing fascia
Where is pretracheal fascia
In anterior neck, blends with pericardium
What does prevertebral fascia extend laterally as?
Axillary sheath in arm
Three contents of the carotid sheath
Carotids, IJV, vagus N
Carotid sheath relation to SCM
Runs along SCM, then under the anterior border of SCM
Where is the retropharyngeal space?
Posterior to pharynx and esophagus, from the base of the skull to the mediastinum
Three fascia layers that form boundaries of the retropharyngeal space
Buccopharyngeal fascia, prevertebral fascia, carotid sheath
Purpose of the retropharyngeal space
Permits movement of pharynx, larynx, and esophagus during swallowing
What can be clinically relevant with the retropharyngeal space?
Easy route for URI or oral infections to spread
What vertebral level is the hyoid bone at?
C3-4 level
Where do all cutaneous nerves to the neck originate from?
Cervical plexus
Where do cutaneous nerves to the neck emerge from?
Posterior margin of mid-SCM
Clinical relevance of nerve point of the neck
Site of anesthetic application
Posterior triangle of the neck: three borders
- SCM
- Trapezius
- clavicle
Anterior border of the neck: three borders
- SCM
- Midline of neck
- Lower border of mandible
Floor of posterior triangle of the neck
Prevertebral fascia
The only unpaired triangle in the neck
Submental triangle
How to differentiate between 1st, 2nd, and 3rd parts of the subclavian A
1st: medial to anterior scalene
2nd: deep to anterior scalene
3rd: lateral to anterior scalene
3rd part of subclavian A relation to brachial plexus
Subclavian A is anterior to brachial plexus
What can compressing subclavian A against the 1st rib do?
Control bleeding in the UE
