Petrosal Nerve (other)

	Petrosal Nerve (other) Petrosal nerve may refer to: Deep petrosal nerve Derived from the symp. plexus around I.C.A. -Unite with the greater superficial petrosal n. (parasymp.) To form the nerve of pterygoid canal (vidian n. ) which passes through the pterygoid canal to reach the spheno- palatine ganglion -Enter the spheno-palatine ganglion in the pterygo-palatine fossa (no relay) Greater petrosal nerve (also known as the greater superficial petrosal nerve) -Parasymp. N. from nervus intermedius -Origin: geniculate ganglion of facial n. -Course: Leave petrous bone via its hiatus to reach middle cranial fossa Then run in its groove to enter f.lacerum to join with deep petrosal n. to form n. to pterygoid canal ( vidian n.) -vidian n. run to reach pterygopalatine fossa -in fossa the parasymp. Fiber of G.S. petrosal n. relay in sphenopalatine ganglion Post ganglionic fibers supply : Mucous gland of palat , nose , nasophartnx & lacrimal gland Lesser petrosal nerve The lesser petrosal nerve (also known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Deep Petrosal Nerve The deep petrosal nerve is a branch of the internal carotid plexus which runs through the carotid canal lateral to the internal carotid artery. It enters the cartilaginous substance which fills the foramen lacerum, and joins with the greater petrosal nerve to form the nerve of the pterygoid canal, also known as the Vidian nerve. The deep petrosal nerve carries postganglionic sympathetic axons to the pterygopalatine ganglion, which pass through without synapsing. These axons innervate blood vessels and mucous glands Mucous gland, also known as muciparous glands, are found in several different parts of the body, and they typically stain lighter than serous glands during standard histological preparation. Most are multicellular, but goblet cells are single- ... of the head and neck. The neuron cell bodies of the axons which form the deep petrosal nerve are found in the superior cervical ganglion. Additional images File:Gray841.png, Sympathetic connections of the pterygopalatin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Greater Petrosal Nerve The greater petrosal nerve (or greater superficial petrosal nerve) is a nerve in the skull that branches from the facial nerve; it forms part of a chain of nerves that innervate the lacrimal gland. The preganglionic parasympathetic axons of this nerve synapse in the pterygopalatine ganglion. Structure Preganglionic parasympathetic fibres arise in the superior salivary nucleus of the pontine tegmentum. They join with general somatic sensory and special sensory fibres to form the nervus intermedius. The nervus intermedius exits the cranial cavity at the internal auditory meatus, and joins with the motor root of the facial nerve at the geniculate ganglion. While preganglionic parasympathetic fibres pass through the geniculate ganglion, they neither synapse, nor have their cell bodies located there. Preganglionic parasympathetic fibres exit the geniculate ganglion as the greater petrosal nerve. It enters the middle cranial fossa through the hiatus of the facial canal, along with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Lesser Petrosal Nerve The lesser petrosal nerve (also known as the small superficial petrosal nerve) is the general visceral efferent (GVE) component of the glossopharyngeal nerve (CN IX), carrying parasympathetic preganglionic fibers from the tympanic plexus to the parotid gland. It synapses in the otic ganglion, from where the postganglionic fibers emerge. Structure After arising in the tympanic plexus, the lesser petrosal nerve passes forward and then through the hiatus for lesser petrosal nerve on the anterior surface of the petrous part of the temporal bone into the middle cranial fossa. It travels across the floor of the middle cranial fossa, then exits the skull via canaliculus innominatus to reach the infratemporal fossa. The fibres synapse in the otic ganglion, and post-ganglionic fibres then travel briefly with the auriculotemporal nerve (a branch of V3) before entering the body of the parotid gland. The lesser petrosal nerve will distribute its parasympathetic post-ganglionic (GVE) fibers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]