Central Auditory Nervous System Disorders

These flashcards cover key vocabulary and concepts related to Central Auditory Nervous System Disorders, helping with understanding and retention for exam preparation.

Retrocochlear Hearing Loss

A type of hearing loss that results from damage or lesion beyond the cochlea.

Demyelinating conditions

Disorders that lead to the loss of the myelin sheath surrounding nerves, examples include Multiple Sclerosis.

Auditory Neuropathy Syndrome

A disorder characterized by lesions of the VIII Cranial Nerve, leading to difficulty in sound transmission.

Nystagmus

Involuntary eye movement that may cause the eyes to vibrate, not affecting the perceived motion of the environment.

Schwannoma

A benign tumor formed from Schwann cells, often slow-growing and may affect auditory function.

Vestibular Schwannomas

Tumors that develop on the vestibular portion of the eighth cranial nerve, leading to hearing loss, tinnitus, and vertigo.

Central Auditory Processing Disorder (CAPD)

A condition where the peripheral auditory system is intact, but processing deficits occur beyond the VIII cranial nerve.

Polymicrogyria

A malformation of cortical development characterized by excessive folding (gyration) in the cerebral cortex.

Bell's Palsy

A condition resulting from compression of the facial nerve, leading to temporary facial paralysis on one side.

Neurological Factors

Causes contributing to CAPD that involve disorders related to the nervous system, such as tumors or lesions.

Retrocochlear Hearing Loss

A type of hearing loss originating from damage to the auditory nerve pathways, commonly due to tumors or other lesions affecting the cochlear nucleus or beyond.

Neurofibromatosis 2

A genetic disorder characterized by the growth of noncancerous tumors on the vestibulocochlear nerve, often leading to hearing loss and balance issues.

Causes of damage to the VIII Cranial Nerve

can include trauma, tumors, or vascular issues that impact auditory function. 

examples of Damage to the VIII CN

Trauma (e.g., blows to the head), strokes, surgical cuts, tumors, growths, and masses.

Fracture along the long axis of the temporal bone

can damage the VIII cranial nerve, leading to hearing loss and balance disturbances.

Retrocochlear Hearing Loss

is a type of hearing loss resulting from lesions or damage to the auditory pathway beyond the cochlea, often involving the VIII cranial nerve or central auditory pathways.

Demyelinating conditions

refer to disorders that cause damage to the myelin sheath surrounding nerve fibers, impacting nerve signal transmission and often leading to auditory processing issues.

Auditory Neuropathy Syndrome

is a hearing disorder characterized by dysfunctional transmission of sound in the inner ear or auditory nerve, leading to difficulty processing sounds despite normal hearing thresholds.

Nystagmus

is an involuntary eye movement that can affect auditory processing by disrupting visual tracking, potentially impacting sound localization and comprehension.

Schwannoma

is a typically benign tumor that arises from Schwann cells, which form the myelin sheath of peripheral nerves. In the context of auditory processing, acoustic neuromas can impact hearing and balance.

Vestibular Schwannomas (Acoustic Neuromas)

are benign tumors on the vestibular nerve that can lead to hearing loss, tinnitus, and balance issues. They arise from Schwann cells and impact the function of the auditory and vestibular systems.

Central Auditory Processing Disorder (CAPD)

is a hearing disorder that affects the brain's ability to process auditory information, resulting in difficulties understanding speech and distinguishing between similar sounds.

Central Auditory Processing Disorder (CAPD)

is a condition where the brain has trouble interpreting sounds, affecting speech comprehension and sound localization.

Polymicrogyria

is a neurological condition characterized by abnormal folding of the brain's surface, leading to developmental delays, seizures, and potential visual and auditory processing issues.

Bell's Palsy

a neurological condition that causes sudden, temporary weakness or paralysis of the facial muscles, typically on one side of the face.

Neurological Factors

refer to the various brain and nerve-related issues that can influence auditory processing, including structural anomalies, developmental disorders, and degenerative conditions.

Central Auditory Nervous System Disorder

refers to conditions affecting the nerve pathways and centers in the brain that process auditory information, impacting hearing and understanding speech.

Neurofibromatosis 2

a genetic disorder characterized by the development of benign tumors on the nerves, particularly affecting hearing and balance.

Causes of damage to the VIII Cranial Nerve

can include trauma, tumors, infections, or neurological diseases that disrupt the function of the auditory nerve, leading to hearing loss or balance issues.

Fracture along the long axis of the temporal bone

can result in damage to the auditory structures, potentially leading to hearing loss and other auditory dysfunction.

Transverse fracture of the temporal bone

a type of skull fracture that occurs perpendicular to the long axis of the bone, which can damage the inner ear and lead to hearing impairment.

Auditory Neuropathy/Auditory Dyssynchrony

is a hearing disorder characterized by abnormal auditory nerve responses, which can result in difficulties with sound perception despite normal hearing thresholds.

Audiometric Configuration in Retrocochlear Hearing Loss

refers to the specific patterns observed in audiograms that indicate hearing loss due to lesions in the auditory pathways beyond the cochlea, commonly showing asymmetrical or flat configurations.

Treatment Options for Retrocochlear Problems

include surgical intervention, auditory rehabilitation, and the use of hearing aids or cochlear implants depending on the severity and type of hearing loss.

Retrocochlear Hearing Loss

is a type of hearing loss caused by damage to the auditory nerve or pathways beyond the cochlea, often leading to asymmetrical hearing loss or poor sound discrimination.

Behavioral Characteristics of Central Auditory Processing Disorder (CAPD)

refer to difficulties in processing auditory information, including issues with understanding speech in noisy environments, following directions, and distinguishing similar sounds.

Maturational Factors in Central Auditory Processing Disorder (CAPD)

are developmental elements that influence auditory processing abilities, often affecting children's communication and learning skills as they grow.

Heterotopia/Ectopic Areas in the Brain

are abnormal brain tissue formations that occur due to improper neuronal migration during fetal development, potentially impacting cognitive and auditory functions.

Intervention/Management of Central Auditory Processing Disorder (CAPD)

involves various strategies and therapies aimed at improving auditory processing skills and may include auditory training, environmental modifications, and individualized education plans.

VII Cranial Nerve (Facial Nerve)

is responsible for controlling the muscles of facial expression, transmitting taste sensations from the anterior two-thirds of the tongue, and providing some autonomic functions such as salivation.

Lesions of the VII Cranial Nerve (Facial Nerve)

are areas of damage or dysfunction in the facial nerve that can lead to facial weakness, loss of taste in the anterior tongue, and other related symptoms.

Is the VII Cranial Nerve (Facial Nerve) part of the Central Auditory Nervous System (CANS)?

No, it is not part of the Central Auditory Nervous System; it primarily controls facial functions and sensations.

How does direct damage to the VII Cranial Nerve manifest?

Direct damage to the VII Cranial Nerve can manifest as facial weakness or paralysis, loss of taste sensation in the anterior two-thirds of the tongue, and difficulties with salivation and other facial expressions.

Beyond direct trauma, what can cause damage to the VII Cranial Nerve?

Damage to the VII Cranial Nerve can be caused by various conditions such as viral infections (e.g., Bell's palsy), tumors, strokes, and systemic diseases that affect nerve function.

How does damage to the VII Cranial Nerve (Facial Nerve) impact speech?

Damage to the VII Cranial Nerve can impact speech by causing articulation difficulties due to facial muscle weakness, affecting the ability to move lips properly and resulting in unclear speech.

Academic Impact of Central Auditory Processing Disorder (CAPD)

Central Auditory Processing Disorder (CAPD) can lead to difficulties in understanding spoken language, particularly in noisy environments, and may affect academic performance due to challenges in listening, following instructions, and processing verbal information.

Dichotic vs. Diotic Listening

Dichotic listening involves presenting different stimuli to each ear, while diotic listening presents the same stimulus to both ears. This can help in assessing auditory processing capabilities.

Pathophysiology of Auditory Neuropathy Spectrum Disorder (ANSD)

Auditory Neuropathy Spectrum Disorder (ANSD) is characterized by a disruption in the normal transmission of sound from the inner ear to the brain, often due to damage at the level of the inner hair cells or the auditory nerve. This can result in varying degrees of hearing loss and difficulty in processing auditory information.

Role of SLPs vs. Audiologists in CAPD Management

Speech-language pathologists (SLPs) focus on assessing and treating communication disorders related to CAPD, while audiologists evaluate auditory processing abilities and provide interventions to improve hearing and listening skills.

Acoustic Reflex Arc Disruption due to VII Cranial Nerve damage

refers to a malfunction in the reflex that protects the inner ear from loud sounds, impacting the contraction of the stapedius muscle.