Lecture 1: Triangles of Neck and Larynx (Part 1) Flashcards Preview

Year 1: 05. Neuro Exam 1 > Lecture 1: Triangles of Neck and Larynx (Part 1) > Flashcards

Flashcards in Lecture 1: Triangles of Neck and Larynx (Part 1) Deck (56)
Loading 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?

  1. Lesser Occipital Nerve
  2. Greater Auricular Nerve
  3. Transverse Cervical Nerve
  4. 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


Lesser Occipital Nerve

1. What is its nerve roots?

2. What does this nerve supply?

1. C2

2. Supplies skin of neck and scalp posterior to auricle


Greater Auricular Nerve

1. What is its nerve roots?

2. What does this nerve supply?

1. C2 and C3

2. Supplies skin and sheath over parotid gland, mastoid process, auricle and angle of mandible


Transverse Cervical Nerve

1. What is its nerve roots?

2. What does this nerve supply?

1. C2 and C3

2. Supplies skin of anterior cervical region


Supraclavicular Nerve

1. What is its nerve roots?

2. What does this nerve supply?

1. C3 and C4

2. Supplies skin over the clavicle and over the shoulder


What nerve is most likely prone to be damaged in the neck?

Spinal Accessory Nerve (CN XI)

Doesn't have much protection and is located in investing layer of fascia


What two muscles does the Spinal Accessory Nerve innervate?


Trapezius Muscle


What does the Phrenic Nerve innervate?

Where is it located?

Innervates Diaphragm: C3, 4, 5 Keeps the Diaphragm Alive

Anterior to Anterior Scalene Muscle

Deep to Cartoid Sheath Structures


Where are the roots of the brachial plexus located?

Between Anterior and Middle Scalene muscles