L42. GA - Orbit & Eye

<p>External Acoustic Meatus (D)</p> Signup and view all the answers

<p>Stapes (B)</p> Signup and view all the answers

<p>Sensorineural Deafness (A)</p> Signup and view all the answers

<p>The tympanic membrane (ear drum) (D)</p> Signup and view all the answers

<p>CN VII Paralysis (D)</p> Signup and view all the answers

<p>It contains modified sweat glands that produce ear wax. (A)</p> Signup and view all the answers

<p>The malleus (C)</p> Signup and view all the answers

<p>The isthmus (C)</p> Signup and view all the answers

<p>To produce cerumen (ear wax) (A)</p> Signup and view all the answers

<p>Conductive hearing loss results from problems with the transmission of sound to the inner ear, while sensorineural hearing loss results from damage to the inner ear or auditory pathway. (D)</p> Signup and view all the answers

<p>The cochlea (A)</p> Signup and view all the answers

<p>The middle ear amplifies sound waves and transmits them to the inner ear via a chain of bones. (A)</p> Signup and view all the answers

<p>The vestibulocochlear nerve (CN VIII) (D)</p> Signup and view all the answers

<p>Malleus (A)</p> Signup and view all the answers

<p>Amplifies sound waves by increasing tympanic membrane tension (D)</p> Signup and view all the answers

<p>Facial nerve (A)</p> Signup and view all the answers

<p>Amplify sound waves and regulate their intensity (D)</p> Signup and view all the answers

<p>Tensor tympani muscle (C)</p> Signup and view all the answers

<p>Repeated physical contact leading to auricular hematoma (D)</p> Signup and view all the answers

<p>Pain in the external ear (D)</p> Signup and view all the answers

<p>It leads to bony growth in the external auditory meatus (A)</p> Signup and view all the answers

<p>Skull fracture (B)</p> Signup and view all the answers

<p>Translucent and gray-reddish (B)</p> Signup and view all the answers

<p>To drain pus from the middle ear cavity (C)</p> Signup and view all the answers

<p>A bright area indicating normal TM position (D)</p> Signup and view all the answers

<p>Conductive hearing loss (D)</p> Signup and view all the answers

<p>Spontaneous healing without treatment (C)</p> Signup and view all the answers

<p>They typically fall out after several months (A)</p> Signup and view all the answers

<p>CN IX (D)</p> Signup and view all the answers

<p>Hypoglossal nerve (E)</p> Signup and view all the answers

<p>CN VII (A)</p> Signup and view all the answers

<p>Sound waves (C)</p> Signup and view all the answers

<p>The sensory innervation of the external ear is provided by a combination of cranial nerves and spinal nerves, with significant overlap. (A)</p> Signup and view all the answers

<p>The central concavity of the tympanic membrane is formed by the attachment of the stapes. (D)</p> Signup and view all the answers

<p>To amplify sound waves before they reach the inner ear. (A), To transmit vibrations from the tympanic membrane to the inner ear. (B)</p> Signup and view all the answers

<p>Auricular muscles are considered to be part of the facial expression muscles. (C)</p> Signup and view all the answers

<p>The central depression on the tympanic membrane formed by the attachment of the malleus handle. (C)</p> Signup and view all the answers

<p>Sound localization. (B)</p> Signup and view all the answers

The structure and function of the ear's outer parts, including the auricle and external acoustic meatus.

The outer, cartilaginous part of the ear that collects sound waves.

A thin membrane that separates the outer ear from the middle ear, transmitting sound vibrations.

The cavity containing the ossicles that helps amplify and transfer sound to the inner ear.

Three small bones (malleus, incus, stapes) in the middle ear that transmit sound vibrations.

Involves the cochlea and vestibular apparatus allowing for hearing and balance.

Understanding ear structure helps diagnose disorders like otitis media and sensorineural deafness.

The part of the ear that collects sound waves and channels them to the tympanic membrane.

Fluid-filled chambers that convert sound signals to electrical impulses sent to the CNS.

Hearing loss caused by abnormalities in the external or middle ear, preventing sound transmission.

Hearing loss due to damage to internal ear structures or auditory CNS pathways.

Outer part of the ear made of elastic cartilage, which collects sound waves.

A canal extending from the auricle to the tympanic membrane, covered with skin and modified glands.

The eardrum that divides the external ear from the middle ear, vibrating to sound waves.

The narrow part of the external acoustic meatus where foreign bodies can get lodged.

Regulates sound wave transmission from air to fluid in the inner ear, amplifying and controlling intensity.

A muscle in the middle ear that helps dampen sounds and protects the inner ear.

A branch of the facial nerve that carries taste sensations from the anterior two-thirds of the tongue and controls glands.

A collection of blood due to injury in the auricle, leading to deformation.

Deformed auricle from repeated trauma causing fibrosis and hematoma.

A bacterial infection of the external auditory canal, often called swimmer's ear.

Bony growth in the EAM due to frequent exposure to cold water.

Normal reflection seen in the tympanic membrane, appears as a cone of light.

Surgical procedure to insert tubes in the TM for chronic ear infections.

Perforation from foreign bodies, infections, pressure, or trauma.

A bright area on the TM indicating normal status during otoscopic assessment.

Minor ruptures in the tympanic membrane can heal on their own without surgery.

The network of nerves supplying sensation to the external ear and EAM.

Innervation from great auricular, lesser occipital, auriculotemporal, facial, and vagus nerves.

The canal that directs sound waves to the tympanic membrane, sensitive to touch and pain.

The central depression in the tympanic membrane formed by the attachment of the malleus.

Collects sound waves and channels them to the tympanic membrane for vibration.

Three small bones in the middle ear that transmit vibrations from the tympanic membrane to the inner ear.

The cranial nerve responsible for motor innervation of auricular muscles and facial expression.

The outer surface of the tympanic membrane is innervated by the same nerves as the EAM.

Muscles around the auricle that can move the ear but are not functionally significant for sound localization in humans.