Posterior Triangle Of The Neck Flashcards
What is found on the roof of the posterior triangle ?
- skin
- superficial fascia
- platysma muscle
- investing fascia of the neck
What is the anterior boundary of the posterior triangle ?
The posterior border of the sternocleidomastoid
What is the posterior boundary of the posterior triangle ?
The anterior border of the trapezius
What is the inferior boundary of the posterior triangle ?
The middle 3rd of the clavicle
What is found on the floor of posterior triangle ?
The prevertebral muscles covered with the prevertebral layer of the deep cervical fascia
Which muscles are on the floor of the posterior triangle ?
- splenius capitis
- levator scapulae
- scalene muscles
• posterior scalene
• middle scalene
• anterior scalene
What divides the posterior triangle into the occipital triangle and the supraclavicular triangle ?
The inferior belly of the omohyoid muscle
What does cutaneous innervation mean ?
innervation to the skin
What is the punctum nervosum ?
The nerve point of the neck
Which nerves are involved in the cutaneous innervation of the neck ?
Great auricular nerve
Lesser occipital nerve
Accessory nerve (not part of cutaneous innervation)
Supraclavicular nerve
Transverse cervical nerve
What is the cervical plexus ?
A network of nerves that supply the neck
It is formed by the anterior rami of the first 4 cervical spinal nerves (C1 to C4)
Are the deep branches of the cervical plexus motor or sensory ?
Motor
Are the superficial branches of the cervical plexus motor or sensory ?
Sensory
Which superficial branches of the cervical plexus arise from C2 to C3 ?
- great auricular nerve
- lesser occipital nerve
- transverse cervical nerve
Which superficial branch of the cervical plexus arises from C3 to C4 ?
Supraclavicular nerve
What does the spinal accessory nerve supply ?
Trapezius and sternocleidomastoid
What is the origin of the subclavian artery ?
Left subclavian artery = aortic arch
Right subclavian artery = brachiocephalic trunk
What are the 5 main groups of the horizontal superficial nodes ?
- submental
- submandibular
- parotid (superficial and deep)
- retroauricular
- occipital
What are the 2 main groups of the horizontal deep nodes ?
- retropharyngeal
- paratracheal, pretracheal, prelaryngeal and infrahyoid
Which oral structures drain into the submandibular nodes ?
- maxillary teeth
- gingivae
- upper lip
Which oral structure drains into the submental nodes ?
- lower lip
Which oral structures drain into the deep cervical nodes ?
- mandibular teeth
- palatine tonsils
Where does the tip of the tongue drain into ?
Drains into the submental nodes
Where does the lateral anterior 2/3 of the tongue drain into ?
Submandibular nodes
Where does the medial anterior 2/3 of tongue drain into ?
Deep cervical nodes
Where does the posterior 1/3 of the tongue drain into ?
Retropharyngeal nodes
Where does the brachial plexus arise from ?
The anterior rami of C5 to T1
Found between the anterior and middle scalene muscles
