Alec Titan
The larynx, also known as the voice box, is an organ located in the anterior neck. It is comprised of intrinsic and extrinsic muscles. The intrinsic muscles are confined within the larynx and are primarily responsible for controlling sound production by adjusting the vocal cords' tension, length, and position. The extrinsic muscles, on the other hand, are attached to the hyoid bone and move the thyroid cartilage, elevating or depressing the larynx during functions such as swallowing and phonation. This article will focus on the muscles that raise the larynx, including the suprahyoid muscles and stylopharyngeus.
| Characteristics | Values |
|---|---|
| Larynx (voice box) | An organ located in the anterior neck |
| Muscles of the Larynx | Divided into two groups: External and Internal muscles |
| External Muscles | Move the thyroid cartilage |
| Internal Muscles | Move the individual components of the larynx |
| Suprahyoid Muscles | Elevate the larynx |
| Infrahyoid Muscles | Depress the larynx |
| Intrinsic Muscles | Control sound production by adjusting vocal cords' tension, length and position |
| Cricothyroid Muscle | Lengthen and tense the vocal cords |
| Thyroarytenoid Muscle | Relax the vocal cords |
| Posterior Cricoarytenoid Muscles | Open the glottis |
| Lateral Cricoarytenoid Muscles | Close the glottis |
Explore related products
What You'll Learn
The suprahyoid muscles elevate the larynx
The larynx, or voice box, is an organ located in the anterior neck. It is a component of the respiratory tract and has several functions, including phonation, the cough reflex, and protection of the lower respiratory tract.
The muscles of the larynx can be divided into two groups: the extrinsic muscles and the intrinsic muscles. The extrinsic muscles act to elevate or depress the larynx during swallowing, while the intrinsic muscles move the individual components of the larynx, playing a vital role in breathing and phonation.
The extrinsic muscles of the larynx are those attached to the hyoid bone, either via origin or insertion, and thus move the thyroid cartilage. The suprahyoid muscles are attached to the superior aspect of the hyoid bone and function to elevate it along with the larynx. These muscles include the stylohyoid, digastric, mylohyoid, and geniohyoid.
The stylohyoid muscle, when contracted, functions as a stabilizer, retractor, and elevator of the hyoid bone. It also helps to keep the pharynx open during inspiration by tensing the floor of the mouth. The mylohyoid muscle elevates the hyoid bone and the floor of the mouth when the mandibular attachment is fixed. When the hyoid attachment is fixed, it depresss the mandible. The geniohyoid muscle has its origin on the inferior mental spine, and its fibers radiate posteroinferiorly to the body of the hyoid.
The suprahyoid muscles, in combination with the infrahyoid muscles, are responsible for the positioning of the hyoid bone. They also play an important role in chewing, swallowing, and speech.
Muscle Mystery: Excitable or Irritable?
You may want to see also
Explore related products
The infrahyoid muscles depress the larynx
The larynx, or voice box, is an organ located in the anterior neck. It is a component of the respiratory tract and is involved in several important functions, including phonation, the cough reflex, and protection of the lower respiratory tract. The intricate coordination of the supra- and infrahyoid muscles ensures that the larynx functions effectively during phonation and airway protection.
The infrahyoid muscles are extrinsic muscles of the larynx. They attach to the lower larynx and the inferior aspect of the hyoid bone. This muscle group includes the sternohyoid, omohyoid, sternothyroid, and thyrohyoid muscles. While the suprahyoid muscles elevate the larynx, the infrahyoid muscles work in opposition to depress or lower the larynx and the hyoid bone.
The hyoid bone is the only bone in the larynx and provides attachment for many extrinsic laryngeal muscles. The infrahyoid muscles, attached to the hyoid bone, coordinate with the suprahyoid muscles to move the larynx as a whole unit. This intricate coordination ensures the larynx functions effectively during phonation and airway protection.
The infrahyoid muscles, by depressing the larynx, play a role in positioning and stabilizing the larynx during swallowing and speech. This movement of the larynx is crucial for airway protection during deglutition. During swallowing, the epiglottis is pulled down to cover the glottis, allowing food and drink to pass safely into the hypopharynx and oesophagus without entering the airway.
The infrahyoid muscles, along with other extrinsic muscles, support and position the larynx within the mid-cervical region. They also aid in the production of speech sounds by altering the position and tension of the vocal cords. The infrahyoid muscles, by depressing the larynx, work in coordination with the suprahyoid muscles to optimize the position of the larynx for effective phonation and airway protection.
Muscle Attraction: Japanese Women's Perspective on Male Physique
You may want to see also
Explore related products
The stylopharyngeus elevates the larynx
The larynx, or voice box, is an organ located in the anterior neck. It is part of the respiratory tract and is involved in several important functions, including phonation, the cough reflex, and protection of the lower respiratory tract. The muscles of the larynx can be divided into two groups: the extrinsic muscles and the intrinsic muscles. The extrinsic muscles are involved in moving the larynx superiorly and inferiorly, while the intrinsic muscles act on the individual components of the larynx, playing a vital role in breathing and phonation.
The stylopharyngeus muscle is an extrinsic muscle of the larynx. It originates from the temporal styloid process and inserts into the thyroid cartilage. The stylopharyngeus muscle is unique in that it is the only muscle of the pharynx innervated by the glossopharyngeal nerve (CN IX), with all other pharyngeal muscles innervated by the vagus nerve (CN X). The stylopharyngeus muscle is also known as the medial-most and most vertical of the three styloid muscles. It is situated between the external carotid artery and internal carotid artery, and it plays an important role in swallowing and speaking.
The stylopharyngeus muscle helps to elevate the larynx and pharynx. During swallowing, the stylopharyngeus muscle works with the pharyngeal constrictor muscles to propel food through the pharynx toward the esophagus. By elevating the pharynx, the stylopharyngeus muscle facilitates the passage of food and protects the airway. This muscle is also involved in speaking, as it helps to elevate the larynx and adjust the position of the vocal cords, which is necessary for producing different sounds.
In summary, the stylopharyngeus muscle is an important extrinsic muscle of the larynx that contributes to vital functions such as swallowing and speaking. By elevating the larynx and pharynx, the stylopharyngeus muscle ensures effective respiration, phonation, and airway protection. Its unique innervation by the glossopharyngeal nerve enables it to coordinate complex movements and facilitate essential physiological processes.
The Trochanter: Muscle Attachment Point and Its Importance
You may want to see also
Explore related products
The cricothyroid muscle lengthens and tenses vocal cords
The larynx, or voice box, is an organ located in the anterior neck. It is part of the respiratory tract and is involved in several functions, including phonation, the cough reflex, and protection of the lower respiratory tract. The muscles of the larynx can be divided into two groups: extrinsic and intrinsic muscles. The extrinsic muscles are attached to the hyoid bone and move the thyroid cartilage, while the intrinsic muscles act on the individual components of the larynx, controlling the length and tension of the vocal cords.
The cricothyroid muscle is an intrinsic muscle of the larynx that originates from the anterolateral aspect of the cricoid cartilage and attaches to the inferior margin and inferior horn of the thyroid cartilage. When the cricothyroid muscle contracts, it pulls the thyroid cartilage downward and anteriorly, causing rotation about the cricothyroid joint. This movement results in the stretching, lengthening, and tightening of the vocal folds, producing higher-pitched sounds during vocalization.
The cricothyroid muscle is unique among the intrinsic muscles of the larynx in that it is innervated by the external branch of the superior laryngeal nerve, a branch of the vagus nerve. This muscle is responsible for tensing the vocal cords, while other muscles, such as the thyroarytenoid and vocalis muscles, are responsible for relaxing them. The cricothyroid muscle is crucial for creating forceful speech and altering the tone of voice, earning it the nickname "singer's muscle".
The cricothyroid muscle also plays a role in emergency medical procedures. During a cricothyroidotomy, a surgical incision is made anteriorly through the cricothyroid ligament to establish a patent airway when other methods are contraindicated. Additionally, the cricothyroid muscle may be injected with botulinum toxin to treat spasmodic dysphonia, a condition involving involuntary movements of the larynx.
In summary, the cricothyroid muscle is an intrinsic muscle of the larynx that lengthens and tenses the vocal cords, facilitating vocalization and enabling the production of higher-pitched sounds. Its unique innervation and functions have earned it the nickname "singer's muscle," reflecting its importance in vocal tone and forceful speech production.
Knee Muscle Strengthening: Simple Exercises for Quick Results
You may want to see also
Explore related products
The thyroarytenoid muscle relaxes vocal cords
The larynx, or voice box, is an organ located in the anterior neck. It is a component of the respiratory tract and plays a role in phonation, the cough reflex, and protection of the lower respiratory tract. The muscles of the larynx can be divided into two groups: extrinsic and intrinsic muscles. The extrinsic muscles are attached to the hyoid bone and move the thyroid cartilage, while the intrinsic muscles alter the length and tension of the vocal cords and the rima glottidis.
The thyroarytenoid muscle is an intrinsic laryngeal muscle that helps regulate the length and tension of the vocal folds. It is a broad, thin muscle that forms the body of the vocal fold and supports the wall of the ventricle and its appendix. The thyroarytenoid muscle arises from the inner surface of the inferior part of the thyroid cartilage and the cricothyroid ligament. Its fibers pass backward and laterally, inserting into the base and anterior surface of the arytenoid cartilage.
The thyroarytenoid muscle is innervated by the recurrent laryngeal nerve, a branch of the vagus nerve. It also receives input from the external laryngeal nerve. The muscle is supplied by the laryngeal branches of the superior and inferior thyroid arteries and is drained by the internal jugular vein via the superior and inferior laryngeal veins.
The thyroarytenoid muscle, along with the cricothyroid and vocalis muscles, works to relax and shorten the vocal folds. This muscle relaxes the vocal cords by drawing the arytenoid cartilages anteriorly, allowing the vocal ligaments to shorten, thicken, and relax. This action also results in a higher pitch of sound production.
The thyroarytenoid muscle has a complex structure and multiple points of attachment, enabling it to perform two distinct actions simultaneously. It is involved in producing speech and plays a role in the modulation of the airstream during voice production.
Understanding the Quadriceps Femoris Muscle Group
You may want to see also
Frequently asked questions
The muscles that raise the larynx are called the suprahyoid muscles.
Suprahyoid muscles are attached to the superior aspect of the hyoid bone. They include the stylohyoid, digastric, mylohyoid, and geniohyoid muscles.
The suprahyoid muscles elevate the hyoid bone and the larynx. They also fixate the hyoid bone.
The extrinsic muscles of the larynx are attached to the hyoid bone and move the thyroid cartilage. They include the suprahyoid and infrahyoid muscles.
The extrinsic muscles of the larynx produce movements of the hyoid bone, position and stabilise the larynx during swallowing and speech, and alter the position of the larynx.
