Voorbeelden van petrosal

• It is located posterior to the groove for the superior petrosal sinus and posterolateral to the jugular foramen.

• It enters the middle cranial fossa through the greater (superficial) petrosal foramen (on the anterior surface of the petrous temporal bone).

• The first is the greater petrosal nerve and the second is the chorda tympani.

• The mucous membranes receive their postganglionic parasympathetic nerve innervation for mucous secretion originating from the greater petrosal nerve (a branch of the facial nerve).

• The visceral motor fibers pass through this plexus and merge to become the lesser petrosal nerve.

• Division of the superior petrosal sinus may be required to gain sufficient access to the posterior fossa with larger tumors.

• Also, to prevent peduncular hallucinosis and other complications due to venous congestion, these types of surgeries should protect the petrosal vein when possible.

• The greater petrosal nerve, which carries sensory fibers as well as preganglionic parasympathetic fibers, emerges from the anterior aspect of the ganglion.

• The inferior petrosal sinus receives the internal auditory veins and also veins from the medulla oblongata, pons, and under surface of the cerebellum.

• The junction of the inferior petrosal sinus with the internal jugular vein takes place on the lateral aspect of the nerves.

• Its medial half is marked by a sulcus, which forms, with a corresponding sulcus on the occipital bone, the channel for the inferior petrosal sinus.

• Just distal to the geniculate ganglion, the facial nerve gives off the greater petrosal nerve.

• The nasal glands are innervated with secretomotor from the greater petrosal nerve.

• The lesser petrosal nerve re-enters and travels through the temporal bone to emerge in the middle cranial fossa just lateral to the greater petrosal nerve.

• The lesser petrosal nerve then travels anteriorly from the hiatus toward the foramen ovale, through which it exits the cranial cavity.