Fibroelastic membrane of larynx

The fibroelastic membrane of the larynx refers to a specialized connective tissue structure that forms part of the laryngeal framework, specifically contributing to the layered architecture of the vocal folds. It is composed primarily of collagen and elastic fibers, which are organized into distinct layers within the lamina propria of the vocal fold. This membrane provides both tensile strength and elasticity, enabling the vocal folds to withstand the mechanical stresses of phonation and rapidly return to their original shape after vibration.

Histologically, the fibroelastic membrane encompasses the intermediate and deep layers of the lamina propria, which together constitute the vocal ligament. The intermediate layer is rich in elastic fibers, while the deep layer contains densely packed collagen fibers, predominantly type I and III, conferring structural integrity and biomechanical resilience.

The superficial layer of the lamina propria, sometimes referred to as Reinke’s space, contains fewer elastic fibers and is more loosely organized, facilitating vibratory motion.

The fibroelastic membrane is essential for the viscoelastic properties of the vocal folds, allowing for efficient sound production and modulation. Its composition and organization are critical for normal voice function and are a focus in the study of vocal fold pathology and surgical reconstruction.