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Expose the trigeminal nerve and facial nerve branches, a new method of chorda


; Revealed trigeminal nerve and facial nerve chorda A new method of Zhao Shuqing (Laboratory of Human Anatomy,[link widoczny dla zalogowanych], Medical College of Nantong University, Jiangsu 226001, China) Key words three and nerve; facial nerve; specimen CLC R322.34 trigeminal nerve is a of thick brain, the sensory and motor fibers, branch more, visit hidden, deep, complex structures. The chorda tympani branch of the facial nerve smaller, but also more difficult to find, difficult specimens, is the focus of experimental teaching of anatomy and difficult. To enable students in the experimental class to further deepen our understanding of the chorda tympani branch of the trigeminal nerve and blood vessels and the relationship between the use of perfusion of blood vessels made after the methods exposed specimens are presented below. 1 specimen drawn and ready to use 1.1 formalin fixed adult cadavers. In anatomy were washed with tap water before bilateral carotid artery and vein. Then the red and blue pigments were used to glue perfusion arteries and veins. By conventional methods, since the lower edge of thyroid cartilage removed at the cross-sectional head,[link widoczny dla zalogowanych], rinse, and then placed in 60% alcohol solution, soaked 1 week, while adding 10% hydrogen peroxide bleaching. 1.2 revealed trigeminal nerve and facial nerve chorda tympani branch of the step (1) Exposure of the chorda tympani: The skull specimens midsagittal cut, take the side of the head specimens. Cause mouth mandibular level back to the skin incision at the mandibular angle. 4cm from the ear and then up to the outside on top of 3 ~ 4cm at skin incision,[link widoczny dla zalogowanych], removal of this region of the skin, superficial fascia, parotid gland and facial nerve in the face of the branch. At the beginning of the mandibular notch, with a rongeur or bone cutting to remove ramus, to protect the inferior alveolar nerve and mandibular hyoid muscle nerves. Removal of part of the wing muscles, find the lingual nerve, and then remove the cheekbones, along the lingual nerve in his back up is to find a branch of the chorda tympani. Crossing the inferior alveolar nerve and lingual nerve superficial blood vessels to the maxillary artery, inferior alveolar nerve and inferior alveolar artery with lines. Bone chisel with the flat rock drum carefully to crack the drilling part of the bone,[link widoczny dla zalogowanych], carefully exposed chorda down until the date of their joining the lingual nerve. Facial nerve canal digging, carefully isolated from the knee ganglion and greater superficial nerve rocks. (2) branches of the trigeminal nerve revealed: first remove the scales of the Ministry of the temporal bone, mandibular nerve up the track, near the oval at the rear of larvae found in the ear L temporal nerve, the ear can be seen enveloping the two temporal neural synthesis of a middle meningeal artery. Accompanied with the superficial temporal artery. Meningeal artery into the skull by the spine L larvae. A forward can be found distributed in the buccal mucosa and buccal area, buccal artery concomitant with the buccal nerve. L larvae retained the integrity of the oval, followed by removing the dura, open MeckelS cavity, exposing half of trigeminal nerve ganglion. Ganglion along the half forward tracking, eye by exposure, maxillary nerve. Eye wall of the cavernous sinus via the superior orbital fissure through the back into lacrimal nerve, frontal nerve and nasociliary nerves, respectively from the outside in, through the superior orbital fissure into the orbit. The superior orbital wall with a rongeur to remove,[link widoczny dla zalogowanych], identify the lacrimal gland above the outer rectus nerve, and lacrimal artery with line forward along the lateral wall of the orbital lacrimal gland. Nasociliary rectus and optic nerve between the warp. Forward in parallel with the anterior ethmoid artery superior oblique and medial rectus in between, wearing out the screen before the larvae L orbit to the anterior cranial fossa. Frontal nerve is located above the levator muscle. Forward into the supraorbital nerve and trochlear nerve. L maxillary nerve through the round larvae into the pterygopalatine fossa, were issued zygomatic nerve, pterygopalatine nerves and superior alveolar nerves: their transfer behavior infraorbital nerve trunk, the inferior orbital fissure, through the infraorbital canal, the infraorbital larvae up to the face L can be seen accompanied with the infraorbital artery. Xiu Jie 1-3 specimen processing to produce hydrogen peroxide and then immersed into 10%, remove 1 to 2 days after washing, trimming, and then placed in the room to dry. The various branches of the trigeminal nerve and the chorda tympani branch of facial nerve repair serious cleaning, and to the structure remains in situ, with 502 normal plastic Traveling fixed nerve location, nerve, coated with yellow watercolor paints, and glue with 502 fixed on the digital label The nerve branches to be displayed on the entire specimen to be dried, coated with gelatin. Gelatin dry, the specimen is placed in 10% formalin bottle sealed for experimental teaching. 2 Experience (1) focuses on production of the trigeminal nerve specimen selection, should be selected for the young, a good head of fixed specimens. (2) specimens with alcohol soaked specimens immersed in water than traditional softer texture, and can significantly reduce the formalin stimulation of the human body, but also to restore the color samples. (3) previously reported method of trigeminal nerve specimens only remain in the nerve branches revealed, while the paper before the dissection into the red and blue pigments through the plastic. On the one hand can make the trigeminal nerve and its branches in the operation easy and the surrounding blood vessels and tissue differences, on the other hand can be better exposed nerves and blood vessels adjacent to the relations and deepen the students understanding of the trigeminal nerve. Received Date】 【20o7_08-10
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