Pharyngeal Contrictors and Longitudinal mm. of Pharynx (MT) Flashcards
Superior Constrictor Origin and Insertion
Origin:
- Lower posterior boarder of medial pterygoid plate
- Hamulus
- Mylohyoid line of Mandible
- Intervening Pterygomandibular Raphe
Insertion:
- Pharyngeal Tubercle
- Pharngeal Raphe
Middle Constrictor Origin and Insertion
Origin:
- Lesser and Greater horns of Hyoid
- Lower portion of Stylohyoid Ligament
Insertion:
- Pharyngeal Raphe
Inferior Constrictor Origin and Insertion
Origin:
- Oblique line of thyroid Cartilage
- Cricoid cartilage
- TENDINOUS ARCH between them
Insertion:
Pharyngeal Raphe
What is the innervation of ALL of the constrictor muscles?
Vagus n (X) **Pharyngeal Branches
What is the ACTION of ALL the contrictor muscles?
Constrict Pharynx
Stylopharyngeus Origin and Insertion
Origin:
- Styloid Process
Insertion:
- Superior Border and Superior HORN of thyroid Cartilage
- Lateral Pharyngeal Wall
Stylopharyngeus Innervation and Action
Innervation:
- Glossopharyngeal (IX)
Action:
- Elevate Pharynx
Salpingopharyngeus Origin and Insertion
Origin:
- Inferiomedial end of Auditory Tube
Insertion:
- Blends with Palatopharyngeus in lateral Pharyngeal Wall
Salpingopharygeus Innervation and Action
Innervation:
- Vagus n. (X) Pharyngeal Branches
Action:
- Elevate pharynx
Palatopharyngeus Origin and Insertion
Origin:
- Posterior Margin of Hard Palate
- Palatine Aponeurosis
Insertion:
- Posterior Boarder of Thyroid Cartilage
- Lateral Wall of Pharynx
Palatopharyngeus Innervation and Action
Innervation:
- Vagus n. (X) Pharyngeal Branches
Action:
- Elevate Pharynx
- Close Oropharyngeal Isthmus
What is the common action of all of the longitudinal Muscles of the Pharynx?
To elevate they pharynx
What is the innervation of Salpingopharygeus and Palatopharyngeus?
CN X Pharyngeal Branches
