Muscular Triangle: Medial Region In Front Of Neck Flashcards
Median region in front of neck
Median space from chin to sternum
Structures
- Suprahyoid structures
- Infrahyoid structures
Suprahyoid structures
- Beginning of anterior jugular veins
- Submental lymph nodes
- Median fibrous raphe
- Hyoid bone
Beginning of anterior jugular veins
From submental veins
Submental lymph nodes
In submental triangle
Median fibrous raphe
Receiving mylohyoid insertion
Hyoid bone
At C2 level with:
1. Above: with suprahyoid
2. Below: infrahyoid
Arterial anastomosis
Infrahyoid structures
- Thyroid membrane
- Laryngeal prominence (Adam’s apple)
- Circothyroid ligament and muscles
- Circoid cartilage
- Circotracheal ligament
- Thyroid isthmus
- Below isthmus
Thyrohyoid membrane
From thyroid cartilage upper border to hyoid upper border pierced by superior laryngeal artery and internal laryngeal nerve
Laryngeal prominence
Thyroid cartilage anterior convex part with thyroid notch on upper margin
Circoid cartilage
At C6 vertebra level
Circotrachel ligament
Between circoid cartilage and 1st tracheal ring
Thyroid isthmus
On 2nd, 3rd, and 4th tracheal rings with vas ulnar anastomosis on its upper border
Below isthmus
- Inferior thyroid
- Thyroidea ima artery
- Jugular arch
Inferior thyroid veins
Descend in front of 5th, 6th, and 7th tracheal rings
Thyroidea ima artery
In 10%
Ascends in front of trachea to isthmus
Jugular arch
Between anterior jugular veins in lower ends
Lymph nodes in median region
- Superficial: submental lymph nodes
- Deep:
- infrahyoid
- prelaryngeal
- pretracheal and paratracheal lymph nodes
Vascular anastomosis in median region
- Between suprahyoid arteries
- Between superior thyroid arteries
- Between infrahyoid arteries
- Jugular arch connecting anterior jugular veins lower ends
