What is a Vidian Canal?

What is a Vidian Canal?

The pterygoid canal, also known as the Vidian canal, is a foramen in the base of skull, located in the pterygoid process of the sphenoid bone, superior to the pterygoid plates, and inferomedial to the foramen rotundum.

What is vidian neurectomy?

Vidian neurectomy is an alternative treatment for intractable vasomotor rhinitis that is unresponsive to other interventions and in patients with significantly impaired quality of life because of their symptoms.

What is Presellar Pneumatization?

Presellar: The air cavity does not penetrate beyond a vertical plane parallel to the anterior sellar wall. Figure 3. Sagittal computed tomography image. Sellar: The sinus is well developed; pneumatization extends beyond the tuberculum sella below the sella.

What is sphenoid Pneumatization?

In sellar type of sphenoid sinus, pneumatization extends beyond the tuberculum sella into the body of the sphenoid and even as far as the clivus and anterior and medial walls can be removed easily permitting total exposure of the base of sella during transsphenoidal approach (Carter et al.).

What is the Vidian nerve?

Medical Definition of Vidian nerve : a nerve formed by the union of the greater petrosal and the deep petrosal nerves that passes forward through the pterygoid canal in the sphenoid bone and joins the pterygopalatine ganglion.

What makes up Vidian nerve?

The nerve of the pterygoid canal (Vidian nerve) is formed by the junction of the greater petrosal nerve and deep petrosal nerve, which passes from the foramen lacerum to the pterygopalatine fossa through the pterygoid canal.

What does the Vidian nerve supply?

The postganglionic fibers form the petrosal nerve, which joins the greater superficial nerve to form the vidian nerve. The vidian nerve therefore contains both the parasympathetic and the sympathetic innervation to the nasal mucosa.

What is Clinoid process?

The anterior clinoid process (ACP) is a bony projection on the medial extremity of the posterior border of the lesser sphenoid wing.

What is Pneumatized sinus?

Sinus pneumatization is a continuous physiological process that causes the paranasal sinuses to increase in volume [5]. Sinuses give resonance to voice, contribute to the shape of the face, and provide some degree of warmth and humidification to inspired air [6].

What goes in Vidian canal?

lacrimal artery.

How is the vidian canal visible?

The vidian canal is visible as an elevation along the lateral aspect of the sphenoid sinus floor The intersection between a line drawn along the posterior border of palatine bone and a horizontal line drawn along the sphenoid sinus floor denotes the opening of the vidian canal into the pterygopalatine fossa

What is the lateral course of the vidian canal?

The vidian canal has a medial to lateral course from the pterygopalatine fossa to foramen lacerum in 80 to 98% of radiographic studies. [7][8] The canal is approximately 18 mm in length.

What are the types of seizures?

Seizures are classified into two groups. Generalized seizures affect both sides of the brain. Absence seizures, sometimes called petit mal seizures, can cause rapid blinking or a few seconds of staring into space.

What is a generalized seizure?

Generalized seizures can start as focal seizures that spread to both sides of the brain. They also can occur as “generalized onset” seizures in which seizure activity starts simultaneously over both sides of the brain.