A13 - Neck Triangles Flashcards
What are the borders of the posterior triangle
posterior border of sternocleidomastoid
clavicle
anterior border of trapezius
What is the floor of the posterior triangle?
splenuis capitus
levator scapulae
scalene
What is the contents of the posterior triangle?
occipital artery
spinal accessory nerve -supplies both muscles
external jugular vein
cervical plexus
What nerves make up the cervical plexus?
lesser occipital
great auricular
transverse cervical
supraclavicular
What is the borders of the submental triangle?
anterior belly of digastric
mylohyoid (floor of the mouth)
What are the contents of the submental triangle?
anterior jugular vein
submental lymph nodes
What do submental lymph nodes drain
lymph from the tongue tip, lower lip, lower incisors
What are the boundaries of the submandibular triangle?
anterior and posterior digastric
inferior border of the mandible
What is the floor of the submandibular triangle?
mylohyoid
What are the contents of the submandibular triangle?
submandibular glands
facial artery and vein
submandibular lymph nodes
Hypoglossal nerve
Describe the route of the hypoglossal nerve?
- exits the skull via stylohyoid foramen
- descends down the neck
- takes a 90º turn looping around the occipital artery
What are the borders of the carotid triangle?
posterior belly of digastric
omohyoid
What are the contents of the carotid sheath?
internal jugular vein
vagus nerve
deep cervical lymph nodes
common (internal) carotid artery
What is the ansa cervicalis made up of?
C1, C2, C3 motor fibres that join to create a loop
What do C1 motor fibres control?
descendens hypoglossi
