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Sumario Anatomia: Sistema Auditivo

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Apuntes completo y breve del sistema auditivo. Ideal para preparar parciales o finales.

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, _______________ Oído Externo _______________
El oído externo comprende dos partes: oreja y el conducto auditivo externo



Oreja o Pabellón auricular:
-​ Configuración Externa: presenta una cara lateral, una
medial y una circunferencia.
●​ Cara lateral: En su parte media se ubica la
concha auricular, a su alrededor presenta tres
calientes:
Hélix.
Antihélix.
Trago: forma triangular por delante de la
concha.
Antitrago: Posteroinferior a la concha.
●​ Cara medial.
●​ Circunferencia: forma ovalada, corresponde al
hélix.




-​ Vascularización:
Arteria temporal superficial (cara lateral) y auricular posterior (cara medial).
-​ Inervación:
•Nervio facial, auriculotemporal y auricular mayor.


Conducto auditivo externo:
Desde la concha hasta la membrana timpánica, aplastada en sentido anteroposterior orientada
medial y hacia adelante.
Se ubica por detrás de la articulación temporomandibular, adelante a la apófisis mastoides,
encima de la parótida y por debajo de la fosa craneal posterior.
-​ Constitución Anatómica:
• Porción ósea: Constituido por la porción timpánica del hueso temporal.
• Porción fibrocartilaginosa: Parte lateral del conducto.
• Revestimiento cutáneo: Su anexos son pelos, glándulas sebáceas y sudoríparas que
producen el cerumen.
-​ Vascularización:
• Porción superficial: Arteria temporal superficial y auricular posterior.
• Porción profunda: Arteria timpánica.
-​ Inervación:

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Uploaded on
March 5, 2026
Number of pages
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Written in
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SUMMARY

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