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Ramus Nasociliaris
Ophthalmic nerve

Nasociliary nerve. N. nasociliaris. Most medial branch of the ophthalmic nerve. It courses below the superior rectus and between the superior oblique and medial rectus. A Communicating branch of nasociliary nerve with ciliary ganglion. Ramus communicans [cum ganglio ciliari]. Any branch carrying sensory fibers from the eye through the ciliary ganglion to the nasociliary nerve. A Long ciliary nerves. Nn. ciliares longi. Two long, fine twigs with sympathetic fibers supplying the dilatator pupillae muscle and afferent fibers from the iris, ciliary body and cornea. A Posterior ethmoidal nerve. N. ethmoidalis posterior. Thin nerve at the posterior end of the orbit supplying the sphenoidal sinus and posterior ethmoidal cells. A

Anterior ethmoidal nerve. N. ethmoidalis anterior. Nerve that enters the cranial cavity (ex-tradural part) through the anterior ethmoidal foramen. It then courses through the cribriform plate of the ethmoid into the nasal cavity. A B C Nasal branches of anterior ethmoidal nerve. Rami nasales [n. ethmoidalis anterior]. Collective term for the following four branches of the anterior ethmoidal nerve.

Internal nasal branches. Rami nasales interni. Rami that innervate the nasal mucosa in front of the conchae and for the anterior nasal septum. B Lateral nasal branches. Rami nasales laterales. Innervate the anterior part of lateral nasal wall. B Medial nasal branches. Rami nasales mediales. Innervate the anterior part of the nasal septum. C External nasal branch. Ramus nasalis externus. Innervates the skin on the tip of the nose and the nasal ala; it passes through the ethmoidal sulcus of the nasal bone. B

infratrochlear nerve. N. infratrochlearis. It passes below the trochlea of the superior oblique at the inner angle of the eye and supplies the lacri-malsac,lacrimalcaruncleandsurroundingskin.A Palpebral branches. Rami palpebrales. Rami for part of the upper and lower eyelids. A Maxillary nerve. N. maxillaris. Second division (branch) of trigeminal nerve. It passes through the foramen rotundum to the pterygopalatine fossa and subsequently through the inferior orbital fissure into the orbit. A C

Meningeal nerve. Ramus meningeus [medius]. Branch given off in front of the foramen rotundum. It supplies the dura in the region of the frontal branch of the middle meningeal artery. A Ganglionic branches. Ramiganglionici(ganglion-ares). Usually two rami from the pterygopalatine ganglion. They contain autonomic fibers for the lacrimal gland and sensory fibers from the periosteum of the orbit. A

Pterygopalatine ganglion. Ganglion pterygo-palatinum. Parasympathetic ganglion located in the corresponding fossa close to the spheno-palatine foramen. Their postganglionic fibers innervate the lacrimal and nasal glands. A B C

16a Parasympathetic root. Radixparasympathetica. Communicates with the greater petrosal nerve.

16b Sympathetic root. Radix sympathetica. Communicates with the deep petrosal nerve.

16c Sensory root. Radix sensoria. Communicates with the maxillary nerve.

17 Orbital branches. Rami orbitales. Two to three fine rami which pass into the orbit through the inferior orbital fissure, then through the bone to the posterior ethmoidal cells and to the sphenoidal sinus. B C

18 Lateral posterior superior nasal branches.

Rami nasales posteriores superiores laterales. Up to 10 fine rami which pass through the sphenopalatine foramen to the superiorand middle nasal conchae and to the posterior ethmoidal cells. B

19 Medial posterior superior nasal branches. Rami nasales posteriores superiores mediales. Two to three branches which pass through the sphenopalatine foramen to the upper part of the nasal septum. C

20 Nasopalatine nerve. N. nasopalatinus [[ incisi-vus]]. It passes between the periosteum and mucosa of the nasal septum, then through the incisive canal to the anterior part of the palatine mucosa and the gingiva of the upper incisor teeth. C

20a Long nasopalatine nerve. Nervusnasopalatinus longus.

20b Branches to nasal septum. Rami septales nasales.

20c Short nasopalatine nerves. Nervi nasopalatini breves.

20d Lateral nasal branches. Rami nasales laterales.

20 e Branches to maxillary sinus. Rami sinus maxillaris.

21 Pharyngeal nerve. Nervus pharyngeus. Fine nerve for the pharyngeal mucosa. B

22 Greater palatine nerve. N. palatinus major. After passing through the greater palatine canal, it courses through the corresponding foramen and supplies the mucosa of the hard palate and its glands. B

23 Posterior inferior nasal branches. Rami nasales posteriores inferiores. Rami for the middle and inferior nasal meatuses as well as the inferior nasal concha. B

24 Lesser palatine nerves. Nn. palatini minores. They travel in their respective, slender canals, exit through the lesser palatine foramina and supply the soft palate. B

24 a Tonsillar branches. Rami tonsillares. Branches to the palatine tonsil.

25 Zygomatic nerve. N. zygomaticus. It branches into the pterygopalatine fossa, passes through the inferior orbital fissure to the lateral wall of the orbit and provides an anastomotic branch to the lacrimal gland. A

26 Zygomaticotemporal branch. Ramus zygomati-cotemporalis. It passes through the respective foramen to the lateral wall of the orbit. A

27 Zygomaticofacial branch. Ramus zygomtico-facialis. It passes through the corresponding foramen to the skin on the zygomatic bone. A

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