Innervation of head and neck, TMJ, and muscular triangles of the neck Flashcards
What are the dermatomes of the head and neck and what areas no they cover
- CN 5 (trigeminal)
- C2= occipital protuberance
- C3= gentleman’s collar
What areas do the cervical plexus cover
the skin, muscles of the head neck and upper shoulders along with the diaphragm
What area are the phrenic nerves located
C3-C5
What are the 2 cutaneous branches of the cervical plexus and what do they innervate
Greater auricular= skin over the parotid gland. auricle and the area of the skin from the angle of the mandible to mastoid process
Lesser occipital= skin of the neck and scalp posterior, superior and inferior to the auricle
True or false the greater occipital nerve is part of the cervical plexus
False
Where does the greater occipital nerve emerge from and what areas does it supply
Emerges= between C1 and C2 beneath the inferior obliquus capitis
Supplies= the skin along the posterior part of the scalp to the top of the head
Disorder of what nerve causes occipital neuralgias
Greater occipital nerve, as it can be entrapped by the inferior obliquus capitis
What is the only moveable joint in the head and what 2 bones form it
temporomandibular joint TMJ
Temporal and mandible
What muscles are part of the TMJ
The muscles of mastication
- temporal
- masseter
- lateral pterygoid
- medial pterygoid
What is TMJ syndrome
a dysfunction to varying degrees of the TMJ with many causes and many treatments
What are the 2 subdivisions of the posterior triangle
- occipital triangle
2. subclavian triangle
What important structures does the occipital triangle contain
- occipital artery
- cervical plexus
- CN11 (accessory)
What important structures does the subclavian triangle contain
- subclavian artery
- subclavian vein
What is another name for the subclavian triangle
supraclavicular triangle
What are the 4 subdivisions of the anterior triangle
- Submental
- Submandibular
- Carotid
- Muscular
