Lecture 1: Triangles of Neck and Larynx (Part 1) Flashcards
Where can you find body of hyoid bone?
Vertebral Level of C3
Where is the upper margin of thyroid cartilage?
Boundary of C3/C4
Where does the bifurcation of the common carotid artery take place?
Boundary of C3/C4
Where is the arch of cricoid cartilage?
Vertebral Level of C6
Where is the superior end of the esophagus?
Boundary of C5/C6
Where is the superior end of the trachea?
Right below cricoid cartilage, Boundary of C5/C6
What divides the anterior and posterior triangles of the neck?
Sternocleidomastoid Muscle (SCM)
What are the boundaries of the anterior triangle?
- Midline of Neck
- SCM Muscle
- Lower border of mandible
What are the boundaries of the posterior triangle?
- SCM Muscle
- Trapezius Muscle
- Clavicle
What is another name for the posterior triangle?
Lateral Cervical Region
In the posterior triangle, what is the floor covered by?
Prevertebral layer of deep fascia
What muscles make up the floor of the posterior triangle?
Hint: 6 Muscles
- Semispinalis Capitis Muscle
- Splenius Capitis Muscle
- Levator Scapulae Muscle
- Posterior Scalene Muscle
- Middle Scalene Muscle
- Anterior Scalene Muscle
What arteries can you find in the posterior triangle?
Subclavian Artery
Part 1:
- Vertebral Artery
- Inferior Thoracic Artery
- Thyrocervical Trunk
- Inferior Thyroid Artery
- Transverse Cervical Artery
- Superificial
- Deep (can be Dorsal Scapular)
- Suprascapular Artery
Part 2:
- Costocervical Trunk
- Deep Cervical Artery
- Supreme Intercostal Artery
Part 3:
- Dorsal Scapular Artery
On which side of the body will you find the brachiocephalic trunk?
Right Side
What does the Transverse Cervical Artery run across of?
Runs superficially and laterally across the phrenic nerve and anterior scalene muscle
*Branch of Thyrocervical Trunk
What does the Suprascapular Artery run across of?
Passes inferolaterally across the anterior scalene muscle and phrenic nerve
*Runs with Suprascapular Nerve
*Branch of Thyrocervical Trunk
What two veins make up the External Jugular Vein?
What is the vein anterior of?
Posterior Auricular Vein and Retromandibular Vein
Anterior to the SCM Muscle
What should you be concerned about if you can see the External Jugular Vein?
Increased venous pressure due to:
Heart Failure
Obstruction to Superior Vena Cava
What two veins combine at a spot where the lymphatics drain?
What vein does it form?
Internal Jugular Vein and Subclavian Vein form Brachiocephalic Vein
- Right Side: Right Lymphatic Duct*
- Left Side: Thoracic Duct*
What is important about Subclavian Vein?
Can insert central lines
What are the four nerves of the cervical plexus that provide cutaneous sensation?
- Lesser Occipital Nerve
- Greater Auricular Nerve
- Transverse Cervical Nerve
- Supraclavicular Nerve
What is the point that cutaneous branches of cervical plexus emerge called?
Where do you find it?
Erb’s Point or Nerve point of the neck
Found in middle of the posterior SCM