Trigeminal semilunar gasserian ganglion

Ganglion trigeminale [[semilunare; Gasseri]]. Semilunar ganglion that is equivalent to a spinal ganglion. It is located in an outpocketing of the subarachnoid space (cavum trigeminale) above the foramen lacerum at the medial, anterior border of the petrous part of the temporal bone. C

Motor root. Radix motoria [portio minor]. Motor portion of trigeminal nerve for innervation of the masticatory muscles. It is situated cranially at the exit of the trigeminal nerve and below the trigeminal ganglion. C Ophthalmic nerve. N. ophthalmicus. First division (branch) of trigeminal nerve. It passes through the superior orbital fissure. C Tentorial (meningeal) branch. Ramus ten-torii (meningeus). Recurrent nerve for the ten-torium cerebelli and falx cerebri. C Lacrimal nerve. N. lacrimalis. Passes laterally through the superior orbital fissure and supplies the lacrimal gland, conjunctiva and lateral portion of upper eyelid. C Communicating ramus with zygomatic nerve. Ramus communicans [cum. n. zygomat-ico]. Connection to the zygomatic nerve with autonomic fibers extending from the pterygo-palatine ganglion to the lacrimal gland. C Frontal nerve. N. frontalis. Nerve that enters the orbit through the superior orbital fissure. It lies on the levator palpebrae superioris and continues toward the forehead. C; see also p. 323 A

Supraorbital nerve. N. supraorbitalis. Thickest branch of the frontal nerve. It supplies the conjunctiva, upper eyelid, frontal sinus and the skin of the forehead. C

Lateral branch. Ramus lateralis. It passes through the supra-orbital notch. C Medial branch. Ramus medialis. It passes medially through the frontal notch. C Supratrochlear nerve. N. supratrochlearis. Thin, medial branch of frontal nerve. It divides at the medial angle of the eye to form an ascending and descending branch. C

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