Related Experiment Video
Updated: Feb 1, 2026
07:20
Imaging Integrin Tension and Cellular Force at Submicron Resolution with an Integrative Tension Sensor
Published on: April 25, 2019
8.0K
Changes in abnormal muscle tension pattern after fiberoptic injection laryngoplasty
Georges Ziade1, Ghassan Haddad, Sarah Assaad
1Division of Laryngology, Department of Otolaryngology-Head and Neck Surgery, American University of Beirut Medical Center, Cairo St., Hamra, Beirut, Lebanon.
Ear, Nose, & Throat Journal
|December 14, 2017
Summary
Fiberoptic injection laryngoplasty significantly reduces abnormal muscle tension patterns (MTPs) in patients with glottal insufficiency, particularly those with unilateral vocal fold paralysis. The procedure effectively improved MTP scores, indicating better vocal fold function post-treatment.
Area of Science:
- Otolaryngology
- Speech and Language Pathology
- Vocal Cord Dysfunction
Background:
- Glottal insufficiency, often caused by unilateral vocal fold paralysis, can lead to abnormal muscle tension patterns (MTPs).
- Muscle tension patterns are a significant factor affecting voice quality and function in patients with vocal fold pathologies.
Purpose of the Study:
- To compare the presence and types of MTPs in patients with glottal insufficiency before and after fiberoptic injection laryngoplasty.
- To evaluate the effectiveness of injection laryngoplasty in reducing abnormal muscle tension.
Main Methods:
- Retrospective chart review of 16 patients diagnosed with glottal insufficiency.
- Analysis of laryngeal videostroboscopic recordings to identify and score MTPs (Type II and Type III).
- Statistical comparison of MTP scores before and 1 month after fiberoptic injection laryngoplasty.
Main Results:
- 15 out of 16 patients exhibited abnormal MTPs before treatment.
- A statistically significant decrease in MTP scores was observed 1 month post-injection for both MTP II (66.2% to 28.9%, p=0.001) and MTP III (71.6% to 37.7%, p=0.043).
Conclusions:
- Fiberoptic injection laryngoplasty is effective in reducing abnormal muscle tension in patients with glottal insufficiency.
- The procedure positively impacts MTPs, suggesting improved laryngeal function and voice outcomes.
Related Concept Videos
01:10Tension
13.9K
Tension is a force along the length of a medium, in particular, a force carried by a flexible medium, such as a rope or cable. The word "tension" comes from Latin, meaning "to stretch". Not coincidentally, the flexible cords that carry muscle forces to other parts of the body are called tendons. Any flexible connector, such as a string, rope, chain, wire, or cable, can exert pull only parallel to its length; so, a force carried by a flexible connector is a tension with a...
13.9K
02:23Abnormal Proliferation
5.2K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
5.2K
02:57Surface Tension, Capillary Action, and Viscosity
33.3K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
33.3K
01:22Surface Tension of Fluid
1.6K
Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies...
Surface tension varies...
1.6K
01:30Respiratory System Abnormal Finding I: Inspection and Percussion
830
Respiratory system abnormalities are a significant concern in healthcare due to their potential to indicate underlying severe conditions like Chronic Obstructive Pulmonary Disease (COPD), asthma, and pneumonia. These abnormalities can often be detected through physical examination methods like inspection and percussion.
Inspection Findings
During an inspection, several findings may suggest the presence of respiratory distress or disease. Pursed-lip breathing, where exhalation is slowed by...
Inspection Findings
During an inspection, several findings may suggest the presence of respiratory distress or disease. Pursed-lip breathing, where exhalation is slowed by...
830
01:29Cardiovascular System Abnormal Findings I: Inspection and Palpation
884
In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
Abnormal findings observed during an inspection
Abnormal findings observed during an inspection
884