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OCULOMOTOR, TROCHLEAR, ABDUCENS AND FACIAL NERVE Dr. Gallatz Katalin

OCULOMOTOR, TROCHLEAR, ABDUCENS AND FACIAL NERVE Dr. Gallatz Katalin. NUCLEI OF THE OCULOMOTOR, TROCHLEAR, AND ABDUCENT NERVE. Oculomotor nucleus – rostral midrain Trochlear nucleus – caudal midbrain Abducens nucleus – caudal pons. SOMATOMOTOR NUCLEI GSE (GSM).

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OCULOMOTOR, TROCHLEAR, ABDUCENS AND FACIAL NERVE Dr. Gallatz Katalin

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  1. OCULOMOTOR, TROCHLEAR, ABDUCENS AND FACIAL NERVE Dr. Gallatz Katalin

  2. NUCLEI OF THE OCULOMOTOR, TROCHLEAR, AND ABDUCENT NERVE Oculomotornucleus – rostralmidrain Trochlearnucleus – caudalmidbrain Abducensnucleus –caudalpons SOMATOMOTOR NUCLEI GSE (GSM) Accessoryoculomotornucleusor Edinger-Westfalnucleus parasympatheticnucleus GVE

  3. CGM nucl. mesenceph. n. V nucl. oculomot. accessorius nucl. oculomotorius nucl. ruber subst. nigra n. oculomotorius Oculomotornucleus (GSE) - striatedmuscles of theeyeballexceptthesup. oblique (IV.n.) and lat. rectus (VI.n.) Accessoryoculomotornucleus (GVE) - Edinger-Westphalnucleus – ciliaryganglion shortciliarynervesconstrictormuscle of pupil, ciliarymuscles

  4. OCULOMOTOR NERVE III. Superiorbranch: Superiorrectus Levatorpalpebraesuperius Inferiorbranch: inferiorrectus inferioroblique branchtotheciliaryganglion parasympathetic GVE fromthe Edinger-Westfalnucleus Fromtheciliaryganglionshortciliary nervestotheconstrictormuscle of pupil, and ciliarymuscles

  5. OCULOMOTOR NERVE III.

  6. GVM nucleus

  7. CILIARY GANGLION

  8. OCULOMOTOR NERVE PALSY (PARESIS) LEFT PALSY

  9. OCULOMOTOR NERVE PALSY (PARESIS)

  10. TROCHLEAR NERVE IV. • TROCHLEAR NUCLEUS –GVE (GSM) • Can be foundatthelevel of inferiorcolliculus. • Fiberscrossdorsaltothe • periaqueductalgrey, thanthey • arerunninginsidetheanterior • petroclinoid fold and cavernous • sinus. • Enter theorbittroughthesup. • orbitalfissure. • Innervatethesup. obliquemuscle.

  11. nucl. n. VI. sup.salivatorynucl. nucl. n. VII. nucleipontis n. VII. n. VI. CAUDAL PONS CAUDAL PONS

  12. ABDUCENS NERVE PALSY (PARESIS)

  13. I. N. ophtalmicus II. N. opticus III. N. occulomotorius IV. N. trochlearis V. N. trigeminus VI. N. abducens VII. Facialnerve VIII. N. vestibulocochlearis IX. Glossopharyngealnerve X. N. vagus XI. N. accessorius XII. N. hypoglossus CRANIAL NERVES

  14. NUCLEI OF FACIAL NERVE: motor nucleus of thefacial n.SVE superiorsalivatorynucleusGVM nucleus of thesolitarytractSVS nucleus of thespinaltrigeminaltr. GSS Sensory ganglion of the facial nerve GENICULAR GANGLION Vegetative (parasympathetic) ganglia: PTERYGOPALATINE GANGLION SUBMANDIBULAR GANGLION

  15. MOTOR NUCLEI OF FACIAL NERVE nucl. n. VI. sup.salivatorynucl. nucl. n. VII. nucleipontis n. VII. n. VI. FACIAL NUCLEUS SVE (SVM) SUPERIOR SALIVATORY NUCLEUS GVE (GVM)

  16. Components of the facial nerve

  17. FACIAL NERVE INNERVATES generalsomatosensoryfibersposterior part of theexternalacusticmeatus specialviscerosensoryfiberstastebuds of theanteriortwothird of thetongue parasympatheticfibersthelacrimal, sublingual,submandibular, anteriorlingualgland and thenasal and palatinemucousglands specialvisceromotorfibersstapedius muscles of facialexpression post. belly of digastric and stylohyoid

  18. BRANCHES OF THE FACIAL NERVE • Intracranialbranches: • greaterpetrosalnerve • SVA, GVE • - stapediusnerveSVE (SVM) • chordatympani • SVA, GVE • - communicatingbranch • tothetympanicplexus

  19. BRANCHES OF THE FACIAL NERVE Extracranialbranches: - posteriorauricularnerveGSA - communicatingbranchtothe auriculotemporalnerve (V/3) - digastric and stylohyoidnerve - temporofacialnerve temporalbranches zygomaticbranchesSVE buccalbranches - cervicofacialnerve marginalmandibularbr. cervicalbranch

  20. Facialnerveparalysis is a commonproblemthatinvolves theparalysis of anystructure innervatedbythefacialnerve. The pathway of thefacialnerve is long and relativelyconvoluted and sothereare a number of causes thatmayresultfacialnerveparalysis The most common is Bell'spalsy, an idiopathicdisease. Facialnerveparalysismay be dividedinto supranuclear and infranuclearlesions

  21. FACIAL NERVE PARALYSIS Moche Culture Representation of Facial Paralysis. 300 A.D. Larco Museum CollectionLima, Peru.

  22. Thankyouforyourattention!

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