22 Questions
What is the main function of the outer ear?
Transmit sounds from external environment to the middle ear
Which structure is NOT part of the auricular pavilion?
Cochlea
What is the origin of the Auricular Superior muscle?
Fosa Temporal
Which nerve innervates the extrinsic muscles of the auricular pavilion?
N. Facial (VII)
What is the length of the external auditory canal?
2.5 cm
What characteristic describes the cartilaginous portion of the external auditory canal?
Cóncava towards the front
Which artery supplies the external ear?
Temporal superficial artery
Which nerve does NOT innervate the external ear?
Phrenic nerve
What structure marks the end of the external ear?
Tympanic membrane
Which wall of the tympanic cavity is associated with the jugular fossa?
Inferior wall
Which structure is NOT part of the middle ear?
Cochlea
What role does the vestibule in the ear have?
Balancing
Which part of the Malleus is NOT listed?
Lenticular process
What type of joint is the Incusomaleolar articulation?
Synovial - Bicondylar
Which bone has a lenticular process?
Incus
Which part is common to both the anterior and posterior limbs of the Stapes?
Base
Which type of joint is the Incusestapedial articulation?
Synovial - Enarthrosis
Which nerve innervates the Tensor Tympani muscle?
Maxillary inferior (V5)
Where does the Stapedius muscle originate?
Eminencia Piramidal del Temporal
Which artery supplies the middle ear?
External Carotid artery
What is the insertion point of the Tensor Tympani muscle?
Mango del martillo
Which nerve provides sensory innervation to the external surface of the tympanic membrane?
Trigemina (V) and the Vagus (X)
Study Notes
Oído Externo: Pabellón Auricular
- The external ear is responsible for collecting sound waves and directing them towards the eardrum
- The pabellón auricular is composed of cartilaginous structures, including:
- Concha de la oreja
- Rama del Antihélix
- Antihélix
- Rama del hélix
- Hélix
- Fosa Triangular
- Fosa Escafoidea
- Tubérculo Auricular (Darwin)
- Trago
- Antitrago
- Escotadura Intertrágica
- Lobúlillo de la oreja
Músculos Externos (Pabellón Auricular)
- These muscles move and fix the ear in place
- Músculo Auricular Anterior:
- Origin: Galea Aponeurótica and Arco Cigomático
- Músculo Auricular Superior:
- Origin: Fosa Temporal and Galea Aponeurótica
- Músculo Auricular Posterior:
- Origin: Galea Aponeurótica and Apófisis Mastoide of the Temporal bone
Inervación: N.Facial (VII)
Conducto Auditivo Externo
- A portion of the Temporal bone
- Composed of two parts:
- Porción Cartilaginosa: (the most external part)
- Porción Ósea: (the longest part, part of the Temporal bone)
- Measures 2.5 cm in length
- The cartilaginous part is concave towards the front
IRRIGACIÓN DEL PABELLÓN AURICULAR
- Ramas de la Carótida Externa:
- Arteria Temporal Superficial
- Arteria Auricular Posterior
INERVACIÓN DEL PABELLÓN AURICULAR
- N.Auriculotemporal (V3)
- Rama del Plexo cervical
- Nervio Occipital menor
- Nervio Auricular mayor
- Rama Auricular del Vago (X)
- Rama Auricular del Facial (VII)
Oído Medio: Caja Timpanica
-
Límites:
- Pared Superior: Tegmen Tympani
- Pared Inferior: Fosa Yugular
- Pared Anterior: Trompa de Eustaquio
- Pared Posterior: La Mastoide
- Pared Interna: Ventana Redonda, oval, pirámide, pía de cuchara, promontorio
- Pared Externa: Membrana Timpánica
Huesecillos del oído
-
Martillo (Maleolo):
- Mango, cabeza, cuello
- Apófisis interna and apófisis anterior
-
Yunque (Incudo):
- Cuerpo
- Rama horizontal
- Rama vertical
- Apófisis lenticular
- Carilla auricular
-
Estribo (Estapedo):
- Rama horizontal
- Rama anterior and posterior
- Base
Articulaciones de los huesecillos
-
Incusomaleolar (Articulación bicondílea poco móvil):
- Sinovial - Encaje recíproco (Yunque + Martillo)
-
Incusestapedial (Articulación Muy Móvil):
- Sinovial - Enartrosis
- Can perform 6 movements + Estabilidad
-
Estapedotimpanica (Between the Estribo and the oval window):
- Fibrosa - Sindesmosis (Tempancut estribo)
Músculos del oído Medio
-
Músculo Tensor del Timpanum:
- Origin: Trompa FaringoTimpanica
- Insertion: Mango del martillo
- Inervación: N.Maxilar inferior (V5)
- Function: Tenses the tympanic membrane
-
Músculo del Estribo:
- Origin: Eminencia Piramidal del Temporal
- Insertion: Cuello del Estribo
- Inervación: N.Facial (VII)
- Function: Directs the Estribo towards the lateral side
This quiz covers the structure and function of the outer ear, including the auricular pavilion and external auditory canal. Learn about the different parts and their roles in hearing.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
