![]() This nucleus lies lateral to the entering trigeminal root fibers in the upper pons. Fibers of the ophthalmic division terminate ventrally, fibers of the maxillary division are intermediate, and fibers of the mandibular division are most dorsal. It is arranged in dorsoventral organization. The principal sensory nucleus convey impulses for tactile and pressure sense. Pal., pterygopalatine Subling., sublingual Submand., submandibular Tr., tract Trig., trigeminal Tym. nerve Nasocil., nasociliary LSPN., lesser superficial petrosal nerve Nucl., nucleus Par., parotid Ptery. N., chorda tympani nerve Cil., ciliary CN., cranial nerve Front., frontal Gang., ganglion Gen., geniculate Gl., gland GSPN., greater superficial petrosal nerve Int., internal Lac., lacrimal Mesenceph., mesencephalic N. N., auriculotemporal nerve C., cervical Car., carotid Chor.Tym. ![]() The parasympathetic fibers are shown as purple lines. Parasympathetic connections of the pterygopalatine, otic, and submandibular ganglia. There is little overlap between the three dermatomes of the trigeminal nerve. The cutaneous innervation of the head and upper neck. Sagittal schematic view passing the right trigeminal nuclei. The motor nucleus is situated medial to the sensory nucleus of the trigeminal nerve. Posterior schematic anatomic view and superimposed diagram of the brain stem showing nuclei of the trigeminal nerve. Thus, a comprehensive knowledge of the anatomy of the trigeminal nerve is crucial for performing the surgical procedures without significant complication.įigure 1. The trigeminal nerve is encountered with imaging or surgery of the skull base surgery. Because of its size and complexity, it is essential to have thorough knowledge of the nerve before diagnoses and treatment of the pathologic processes in the orofacial, temporomandibular, infratemporal, and pterygopalatine areas. It serves as a major conduit of sensory input from the face and provides motor innervation to the muscles of mastication. The trigeminal nerve is the largest and most complex of the cranial nerves. Ten adult cadaveric heads were studied, using a magnification ranging from 33 to 403, after perfusion of the arteries and veins with colored latex. We also demonstrate some pictures involving the trigeminal nerve and its surrounding connective and neurovascular structures. The objective of this study is to review surgical anatomy of the trigeminal nerve. ![]()
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