Palatine aponeurosis

Palatine aponeurosis is a thin, fibrous lamina, which covers the muscle fibers of the Tensor veli palatini and is attached to the posterior border and lateral surface of the hard palate. It plays a crucial role in the functioning of the human oral cavity and is a significant component of the soft palate.

Structure

The Palatine aponeurosis is a horizontal plate-like structure, which is located in the posterior part of the hard palate. It is composed of dense connective tissue and is covered by the mucous membrane. The aponeurosis is attached to the posterior border of the hard palate and extends laterally to the sides of the oral cavity.

Function

The primary function of the Palatine aponeurosis is to provide support and movement to the soft palate. It aids in the elevation of the soft palate during swallowing and speaking, preventing food and liquid from entering the nasal cavity. It also plays a role in the opening and closing of the Eustachian tube, which helps in equalizing the pressure in the middle ear.

Clinical significance

Damage or dysfunction of the Palatine aponeurosis can lead to various oral and pharyngeal disorders. It can cause velopharyngeal insufficiency, a condition where the soft palate fails to close completely during speech, resulting in nasal speech. It can also lead to palatal myoclonus, a rare neurological disorder characterized by rapid, involuntary contractions of the Palatine aponeurosis.

See also

• Soft palate
• Hard palate
• Tensor veli palatini
• Velopharyngeal insufficiency
• Palatal myoclonus