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Facial and Masticatory Muscles in Head and Neck Anatomy

Explore the intricate network of facial and masticatory muscles in head and neck anatomy, including movements and functions. Comprehensive guide by Jakub Štefela, 2012.

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Facial and Masticatory Muscles in Head and Neck Anatomy

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  1. MASTICATORY MUSCLES • n. V3 – n. MANDIBULARIS • derivates of 1st pharyngeal arch • m. temporalis • m. masseter • m. pterygoideus medialis • m. pterygoideus lateralis

  2. Lower jaw movements • elevation (elevatio) • depression (depressio) • protraction / propulsion (protractio / propulsio) • retraction / retropulsion (retractio / retropulsio) • lateropulsion (lateropulsio)

  3. m. temporalis m. masseter

  4. Jakub Štefela,Svaly hlavy a krku, 2012 9

  5. m. pterygoideus lateralis m. pterygoideus medialis

  6. m. pterygoideus lateralis m. pterygoideus medialis

  7. Jakub Štefela,Svaly hlavy a krku, 2012 12

  8. Mandibularsling • fibrous sling below angulus mandibulae • connection of m. masseter and m. pterygoideus medialis

  9. FACIAL MUSCLES • n. VII – n. FACIALIS • derivates of 2nd pharyngeal arch • muscles around the eye • muscles around the nose • muscles around the mouth • muscles of the cranial vault • muscles of the auricle • m. buccinator

  10. Musclesaroundtheeye • m. orbicularisoculi • parspalpebralis • parsprofunda(formerparslacrimalis) • parsorbitalis • m. procerus • m. corrugatorsupercilii • m. depressorsupercilii • Muslcesaroundthe nose • m. nasalis • parsalaris • parstransversa • m. depressorseptinasi

  11. Musclesaroundthemouth • modiolusangulioris • m. orbicularisoris • parsmarginalis • parslabialis • m. levator labii superioris • m. levator l.s. alaequenasi • m. depressor labii inferioris • m. levatorangulioris • m.depressor angulioris • m. zygomaticus major • m. zygomaticusminor • m. risorius • m. mentalis • m transversusmenti

  12. Modiolusangulioris fibro-muscular node connecting the insertions of facial muscles serve as the „hub“ and forms a dimple on the cheek

  13. tough aponeurosis covering the vertex of skull GaleaaponeuroticaEpicranialsponeurosis

  14. Scalpation

  15. Subgalearhematoma

  16. Muslcesofthecranialvault • = m. epicranius • m. occipitofrontalis • venterfrontalis • venteroccipitalis • m. temporoparietalis • Galeaaponeurotica = Aponeurosisepicranialis • Musclesoftheauricle • m. auricularisanterior • m. auricularis superior • m. auricularisposterior • rudimentarymuscleofauricle (7)

  17. m. buccinator

  18. Musculus buccinator • ductusparotideusStenoni • corpus adiposumbuccaeBichati • lateralwallof oral cavity • testingmovementsofn. facialis

  19. Fasciaeofhead • fascia temporalis • fascia parotidea • fascia masseterica • fascia buccopharyngea • lamina interpterygoidea corpus adiposum buccaeBichati

  20. Corpus adiposum buccae Bichati

  21. Superficialmusculo-aponeuroticsystem(SMAS) continuousfibro-musuclarlayerconnectingthefacialmusclesandfillingspacesbetweenandaroundthem

  22. Motor somitecranialnerves • preoticmyotomes(somitomeres) formtheexternalmusclesofeyeball– n. III, IV, VI • occipitalsomitesfromthemusclesoftongue– n. XII

  23. Externalmusclesofeyeball • mm. recti • superior, inferior, medialis, lateralis • mm. obliqui • inferior, superior • m. levator palpebrae superioris • inervace: n. III, n. IV, n. VI • smooth muscles: m. orbitalis Mülleri, m. tarsalis sup. Mülleri + inf.

  24. Externalmusclesofeyeball

  25. Jakub Štefela,Svaly hlavy a krku, 2012 34

  26. Movementsofeyeball

  27. Anulus tendineus communis Zinni inside: • n. III • n. VI • n. nasociliaris • n. II + AO outside: • n. IV • n. frontalis • n. lacrimalis • v. ophthalmica superior

  28. MUSLCES OF THE NECK

  29. Os hyoideum corpus cornua majora cornua minora

  30. Jakub Štefela,Svaly hlavy a krku, 2012 39

  31. Musclesofneck • platysma – n. VII • m. sternocleidomastoideus – n. XI + C2-4 • mm. infrahyoidei – ansa cervicalis profunda • mm. suprahyoidei – V3, VII., C1 • mm. scaleni – nn. spinales (C1-C8) • deep muscles of neck – nn. spinales (C1-C6)

  32. Platysma • superficial (skin) muscle • external to lamina spf. fasciae cervicalis • absent in the midline • insertion: pars labilais, modiolaris et mandibularis • n. VII (r. colli) • function: skin tension

  33. Krční řasa – Pterygium colli Turners‘ sy

  34. M. sternocleidomastoideus • origin: 2 parts • pars sternali et clavicularis • fossa supraclavicularis minor(projection of cupula pleurae) • úpon:processus mastoideus + linea nuchalis superior • n.XI + fibers from C2-4 • movements in articulatio atlantooccipitalis

  35. M. sternocleidomastoideus • function • bilateral: • posterior part – retroflexion • anterior part – anteflexion • unilateral: • lateroflexion to the same side • rotation to the opposite side

  36. Musculiinfrahyoidei • m. sternohyoideus • m. sternothyroideus • m. thyrohyoideus – C1 • m. omohyoideus • venter superior + inferior • innervation: ansa cervicalis profunda C1-C3 • function: stabilization of larynx

  37. Torticollis

  38. Musculisuprahyoidei derivates of 2nd pharyngeal arch – n. VII • m. stylohyoideus • m. digatricus – venter posterior derivates of 1st pharyngeal arch – n. V3 • m. mylohyoideus • m. digatricus – venter anterior derivates of cervical somites: • m. geniohyoideus – C1 • function: stabilization of larynx (phonation)

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