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The vocal cords, also known as vocal folds, are two bands of smooth muscle tissue found in the larynx, or voice box. They are responsible for producing the unique sound of your voice. The length and thickness of vocal cords determine an individual's pitch, with thicker cords resulting in a lower pitch or deeper voice. Vocal cords are susceptible to various disorders, such as laryngitis, nodules, polyps, and paralysis, which can affect voice quality and require medical attention. These disorders can be caused by vocal abuse, misuse, or external factors like smoking and inhaling irritants. Understanding the anatomy and functionality of vocal cords is crucial for maintaining vocal health and treating related conditions.
| Characteristics | Values |
|---|---|
| What are vocal cords? | Two muscular bands inside the voice box (larynx) that produce the sound of your voice. |
| Location | The vocal cords are located in the larynx, deep in the anterior neck. |
| Structure | The vocal cords are multilayered structures consisting of a muscle covered by a mucosal covering. |
| Composition | The vocal cords are composed of three distinct tissues: the outer layer is squamous, non-keratinizing epithelium, the middle layer is the lamina propria, and the deepest portion is composed of the vocalis and thyroarytenoid muscles. |
| Function | The vocal cords vibrate when you speak or sing, producing the sound of your voice. They also function as a sphincter, preventing the inhalation of liquids or particles into the lungs. |
| Disorders | Vocal cord disorders can be caused by abuse or misuse, such as excessive use of the voice, smoking, or inhaling irritants. Common disorders include laryngitis, vocal nodules, polyps, cysts, and paralysis. |
| Treatment | Vocal cord disorders are preventable and treatable. Treatment options include resting the voice, surgery to remove growths, and referral to a speech-language pathologist. |
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What You'll Learn
Vocal cords are two bands of smooth muscle tissue
The vocal cords, or vocal folds, are indeed two bands of smooth muscle tissue. They are located in the larynx, or voice box, and are responsible for producing the sound of our voice. The vocal cords vibrate when we speak or sing, and these vibrations are created by the passage of air from the lungs through the cords.
The vocal cords are composed of three basic layers. The outer layer is a squamous, non-keratinizing epithelium. The middle layer is the lamina propria, which helps the vocal cords move. The innermost layer is the muscular layer, which includes the vocalis muscle and the thyroarytenoid muscles. The thyroarytenoid muscles form the body of the vocal folds themselves.
The length and thickness of our vocal cords determine our pitch. Thicker vocal cords produce a lower pitch, while longer vocal cords produce a higher pitch. The pitch can also be altered by changing the position and tension of the cords, which is controlled by the joints and muscles of the larynx.
The vocal cords also have a protective function. During swallowing, they close to prevent food, liquid, or foreign substances from entering the windpipe. They also function as a sphincter, preventing the inhalation of liquid or particles into the lungs.
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Vocal cord disorders
Vocal cords, also known as vocal folds, are two bands of smooth muscle tissue found in the larynx (voice box). The length and thickness of one's vocal cords determine the pitch of their voice. Thicker vocal cords produce a lower pitch, resulting in a deeper voice. The average vocal cord length for females is between 1.25 and 1.75 centimetres, while for males, it is between 1.75 and 2.5 centimetres.
Symptoms of vocal cord disorders include changes in one's normal voice, such as a raspy, hoarse, low, or breathy voice. Other symptoms may include trouble swallowing, coughing, and breathing. Any hoarseness or change in voice that lasts longer than two weeks should be brought to the attention of a healthcare provider.
Some common vocal cord disorders include laryngitis, vocal cord nodules, vocal polyps, and vocal cord paralysis. Vocal cord nodules and polyps are benign (noncancerous) growths that can cause a weak or hoarse voice, or even complete voice loss. Vocal cord paralysis occurs when the vocal cords cannot open and close normally, resulting in difficulty speaking, breathing, swallowing, or coughing.
Treatment options for vocal cord disorders may include resting the voice, stopping the behaviour that caused the disorder, and referral to a speech-language pathologist. In some cases, surgery may be required to remove growths. Most vocal cord disorders can be reversed, and they are easily preventable by avoiding vocal abuse and misuse.
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Vocal cord paralysis
Vocal cords, or vocal folds, are two muscular bands inside the larynx (voice box) that vibrate to produce the sound of your voice. The vocal cords are elastic and stretch from the left to the right side of the voice box, connecting to various muscles and cartilage inside the larynx.
The most common treatments for vocal cord paralysis are voice therapy and surgery. Voice therapy can help strengthen the vocal cords and improve their function. Surgery may be recommended if the paralysis is due to a structural issue, such as a tumour or injury. One surgical procedure, called medialization laryngoplasty, involves inserting an implant into the larynx to improve voice quality. In some cases, a laser cordotomy and arytenoidectomy may be performed to restore airway patency.
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The length and thickness of vocal cords
The length and thickness of the vocal cords determine the pitch of an individual's voice. Thicker vocal cords produce a lower pitch, resulting in a deep voice. On the other hand, thinner vocal cords produce a higher pitch.
At birth, the length of the vocal cords is approximately 6 to 8 millimetres. By adolescence, the vocal cords grow to a length of 8 to 16 millimetres. The average adult male's vocal cords are between 1.75 and 2.5 centimetres long, while the average adult female's vocal cords are between 1.25 and 1.75 centimetres long. The length of vocal cords in children is much shorter than that of adult males and females.
During puberty, testosterone causes changes in the cartilages and musculature of the larynx in males, thickening and lengthening the vocal cords and resulting in a deeper voice. Similarly, individuals who receive testosterone as part of masculinizing hormone therapy experience similar changes in their vocal cords, leading to deeper voices. Conversely, individuals who undergo feminizing hormone therapy continue to have deeper voices unless they undergo voice feminization surgery or work with a speech-language pathologist to adjust their pitch.
In addition to hormonal influences, the length and thickness of vocal cords can be affected by age. For some individuals, the vocal cords and other muscles inside the larynx shrink and weaken over time, making it more difficult to speak. Structural changes associated with aging, such as the thickening of the vocal fold mucosa and cover, have been observed in both males and females.
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Vocal cords and the larynx
The vocal cords, or vocal folds, are two muscular bands inside the larynx, or voice box, that produce the sound of your voice. They vibrate when you speak or sing, and air passes through them from the lungs to produce sound. The length and thickness of your vocal cords help determine how high or low your voice is, or your pitch. Thicker vocal cords produce a lower pitch, or a deeper voice. The average vocal cord length is 1.75 to 2.5 centimeters for males and 1.25 to 1.75 centimeters for females.
The vocal cords are not isolated structures but are made up of multiple folds that connect to various muscles and cartilage inside the larynx. The vocal cords are covered by a moist, protective lining called a mucous membrane. Underneath this lining, vocal cords consist of three basic layers: an outer layer of cells called the epithelium, a middle layer called the lamina propria, and an innermost muscular layer that includes the vocalis muscle and the thyroarytenoid muscles. The thyroarytenoid muscles are part of the vocal folds themselves, and they contract to produce strong singing and any chest voice.
The larynx, or voice box, is located on top of the windpipe, or trachea, directly behind the Adam's apple. The Adam's apple is the bony protrusion in the front of the throat that moves up when you swallow and down when you yawn. The larynx splits into three distinct regions: the supraglottis, glottis, and subglottis. Within these regions, the cartilage, neurovascular, and musculature are all intertwined to allow the larynx to function as a unit and carry out its many functions. The primary functions of the larynx are voice production, protection of the airway during respiration, and swallowing.
The most common conditions that affect the vocal cords include laryngitis, vocal nodules, polyps, and cysts, and vocal cord paralysis. Laryngitis is swelling or inflammation of the vocal cords, which may cause a person to lose their voice or sound weak, hoarse, or raspy. Overusing the vocal cords, infections, smoking, and chronic acid reflux are all possible causes of laryngitis. Vocal nodules, polyps, and cysts are benign growths that can cause the voice to sound weak or hoarse, or the person may completely lose their voice. These growths often result from straining the voice but can also be caused by smoking, sinusitis, and allergies. Vocal cord paralysis prevents a person from being able to open and close their vocal cords normally, causing difficulty speaking, breathing, or swallowing.
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Frequently asked questions
Yes, the vocal cords (also known as vocal folds) are composed of muscle. They are two bands of smooth muscle tissue found in the larynx (voice box).
The vocal cords are multilayered structures. The outer layer is squamous, non-keratinizing epithelium. The middle layer is the lamina propria, which helps the vocal cords move. The innermost layer is the thyroarytenoid muscle, which includes the vocalis muscle.
The vocal cords vibrate when we speak or sing, producing the sound of our voice. Air passes through the cords from the lungs, and the pitch is altered by changing the position and tension of the folds.
