What is the inferior constrictor of the pharynx attached to?
The inferior pharyngeal constrictor muscle arises from the oblique line of the thyroid cartilage of the larynx and the lateral aspect of the cricoid cartilage of the larynx. It acts by constricting the lower portion of the pharynx.
What type of muscle is the inferior pharyngeal constrictor?
skeletal muscle
The inferior pharyngeal constrictor muscle is a skeletal muscle of the neck. It is the thickest of the three outer pharyngeal muscles. It arises from the sides of the cricoid cartilage and the thyroid cartilage. It is supplied by the vagus nerve (CN X).
What are the two parts of the inferior constrictor?
The inferior pharyngeal constrictor consists of two parts; thyropharyngeal and cricopharyngeal.
What passes between inferior and middle pharyngeal constrictors?
The superior laryngeal artery
The superior laryngeal artery passes between the middle and inferior pharyngeal constrictor muscles, and most commonly enters the larynx through the thyrohyoid membrane; however, it may pass through an opening in the thyroid lamina in patients with absent superior cornu and may rarely enter through the cricothyroid …
Where is the Cricopharyngeal muscle?
What is cricopharyngeal bar? The cricopharyngeus muscle is located at the junction of the pharynx (throat) and esophagus, and is the major muscular component of what is called the upper esophageal sphincter (UES). At rest, the UES closes the passageway between the pharynx and esophagus.
What is the function of the Cricopharyngeus muscle?
Abstract. The cricopharyngeus is a narrow band of muscle strategically placed between the pharynx and esophagus. Its normal function is vital to the efficient transfer of foodstuffs to the esophagus. Cine- and videoradiography are the major methods of studying the pharyngo-esophageal segment.
Where is the Cricopharyngeus located?
The cricopharyngeus muscle is located at the junction of the pharynx (throat) and esophagus, and is the major muscular component of what is called the upper esophageal sphincter (UES).
What passes between superior and middle pharyngeal constrictors?
The superior gap between the superior and middle pharyngeal constrictors allows passage of the stylopharyngeal muscle and glossopharyngeal nerve, as well as the passage of stylohyoid ligament into the internal aspect of the pharynx.
What is the function of the cricopharyngeus muscle?
Where is the cricopharyngeus and what is its role in swallowing?
The cricopharyngeal muscle — sometimes called the upper esophageal sphincter (UES) — is located at the top portion of your esophagus (food pipe). This muscle contracts to open and close the esophagus, allowing food and liquid to pass through. In people with cricopharyngeal spasm, this muscle contracts too much.
What is the role of the cricopharyngeus in the esophageal constrictions?
This upper esophageal sphincter (UES)—also called the cricopharyngeus—is a semi-circular muscle located in the neck about three inches below the Adam’s apple. To prevent the reflux of foods from the esophagus into the throat, the cricopharyngeus remains contracted and tight at most times.
What does cricopharyngeal mean?
Medical Definition of cricopharyngeal
: of or relating to the cricoid cartilage and the pharynx.
What is the cricopharyngeal muscle?
The cricopharyngeus muscle is located at the junction of the pharynx (throat) and esophagus, and is the major muscular component of what is called the upper esophageal sphincter (UES). At rest, the UES closes the passageway between the pharynx and esophagus.
What cranial nerve Innervates the Cricopharyngeus?
Cricopharyngeus The CP receives innervation from the pharyngeal plexus, which is supplied by three major nerves: vagus nerve branches including the pharyngeal branch of the vagus nerve [also referred to as the pharyngoesophageal nerve (PEN), superior laryngeal nerve (SLN), and recurrent laryngeal nerve (RLN)]; the …
What is the origin of middle pharyngeal constrictor?
Middle pharyngeal constrictor
| Origin | Stylohyoid ligament, greater and lesser horn of hyoid bone |
|---|---|
| Insertion | Median pharyngeal raphe, blends with superior and inferior pharyngeal constrictors |
| Action | Constricts wall of pharynx during swallowing |
| Innervation | Branches of pharyngeal plexus (CN X) |
What is the function of cricopharyngeus muscle?
What causes dysfunction of the cricopharyngeal muscle?
Causes of Cricopharyngeal Dysfunction
Cricopharyngeal dysfunction can be caused by esophageal muscle enlargement, changes in the nerve signaling pathways, scarring of the muscle, radiation, trauma, stroke, or gastroesophageal reflux disease (GERD).
What does the cricopharyngeus muscle do?
What level is the cricopharyngeus muscle?
The blue arrow points to a posterior, bar-like protrusion at the level of C5-C6 that represents a prominent cricopharyngeus muscle. Usually relaxed on swallowing in asymptomatic individuals, the cricopharyngeus is not visible on a normal barium swallow.
What are the 3 regions of the pharynx?
What are the parts of the pharynx?
- Nasopharynx: The top part of the throat connects to the nasal cavities (nose) and lets air pass through.
- Oropharynx: The middle part of the throat connects to the oral cavity (mouth).
- Laryngopharynx (or hypopharynx): The bottom part of the throat is near the larynx (or voice box).
What nerve controls the pharyngeal constrictor?
the vagus nerve
It receives motor innervation from the vagus nerve (CN X) via the pharyngeal plexus and the RLNs.
How do you fix cricopharyngeal muscles?
The definitive treatment for cricopharyngeal dysfunction is a procedure called cricopharyngeus muscle myotomy in which physicians cut the UES in a way that prevents it from over-contracting, so food is no longer blocked from entering the esophagus.
How do you strengthen the cricopharyngeus muscle?
You can also try these exercises for cricopharyngeal spasm:
- Shaker exercise: Lay down, raise your head and look at your feet without lifting your shoulders. Hold for 60 seconds, then repeat a few times.
- Mendelsohn maneuver: Hold your voice box for three to five seconds after swallowing.
Where is the cricopharyngeal muscle?
What are the three parts of the pharynx and their functions?
The pharynx anatomy includes:
- Nasopharynx: The top part of the throat connects to the nasal cavities (nose) and lets air pass through.
- Oropharynx: The middle part of the throat connects to the oral cavity (mouth).
- Laryngopharynx (or hypopharynx): The bottom part of the throat is near the larynx (or voice box).