Related Experiment Video
Updated: Jul 22, 2026
07:13
Modified Experimental Conditions for Noise-Induced Hearing Loss in Mice and Assessment of Hearing Function and Outer Hair Cell Damage
Published on: February 10, 2023
Hearing loss in chronic alcoholics.
G Niedzielska1, E Katska, W Kusa
1Department of Paediatric Otolaryngology, Phoniatry and Audiology, Medical University of Lublin.
Annales Universitatis Mariae Curie-Sklodowska. Sectio D: Medicina
|April 30, 2002
Summary
Chronic alcohol abuse significantly damages hearing, affecting outer hair cells and brain stem pathways. This study reveals sensorineural hearing loss in alcoholics, highlighting the critical impact of excessive alcohol consumption on auditory function.
Area of Science:
- Otolaryngology
- Neuroscience
- Toxicology
Background:
- Alcohol abuse is a widespread issue with known detrimental effects on various bodily systems.
- Auditory system damage, including hearing loss and psychical disorders, is a documented consequence of chronic excessive alcohol consumption.
- Understanding the specific mechanisms and locations of hearing organ damage in alcoholics is crucial for effective intervention.
Purpose of the Study:
- To evaluate the extent and specific location of auditory organ damage in individuals with a history of alcoholism.
- To investigate the relationship between chronic alcohol abuse and sensorineural hearing loss.
- To assess the functional integrity of the auditory pathway from the cochlea to the brain stem in alcohol-dependent patients.
Main Methods:
- Audiologic examinations were performed on 30 individuals diagnosed with alcoholism.
- The diagnostic procedures included pure-tone audiometry, impedance audiometry, otoacoustic emissions testing, and evoked brain stem responses.
- These tests collectively assessed hearing sensitivity, middle ear function, cochlear outer hair cell integrity, and neural pathway function.
Main Results:
- All 30 patients exhibited sensorineural hearing loss.
- Otoacoustic emissions were absent in the patients, indicating damage to the outer hair cells of the cochlea.
- Evoked brain stem responses revealed damage to the auditory pathways within the brain stem.
Conclusions:
- Chronic excessive alcohol consumption leads to significant sensorineural hearing loss.
- Alcohol abuse directly damages cochlear outer hair cells, as evidenced by the lack of otoacoustic emissions.
- The auditory pathways in the brain stem are also compromised in alcoholics, contributing to overall hearing impairment.
Related Concept Videos
00:50Unrenewable Cells
In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of their outer...
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of their outer...
01:27CNS Depressants: Alcohol and Nicotine
Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...
01:24Chronic Pancreatitis I: Introduction
The pancreas, an elongated and flat gland situated behind the stomach, serves a vital function in digesting food and managing blood sugar levels.
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...
01:23Chronic Obstructive Pulmonary Disease II: Emphysema
Emphysema, a major phenotype of chronic obstructive pulmonary disease (COPD), is characterized by irreversible destruction of alveolar walls and permanent enlargement of distal airspaces. Unlike chronic bronchitis, which primarily affects the airways, emphysema predominantly involves the lung parenchyma, where structural damage leads to airflow limitation.PathophysiologyIt most commonly results from prolonged exposure to cigarette smoke and other toxic gases, particularly cigarette smoke.
01:25Chronic Pancreatitis I: Introduction
Chronic pancreatitis is a long-standing, relapsing inflammation of the pancreas, characterized by irreversible damage to the gland. It results in progressive destruction of the pancreatic parenchyma, fibrosis, and eventual loss of both exocrine and endocrine function. The disease may evolve gradually after multiple episodes of acute pancreatitis or develop independently.EtiologyChronic pancreatitis can arise from a variety of causes:Alcohol use is the leading cause, accounting for 70–80% of...
01:21Chronic Pancreatitis II: Pathophysiology
Chronic pancreatitis is a progressive and irreversible inflammation of the pancreas, most often caused by long-term alcohol abuse, but it can also be related to ductal obstruction, smoking, or genetic factors.Chronic pancreatitis occurs when the pancreas is repeatedly exposed to harmful agents like alcohol, smoking, ductal obstruction, or genetic predisposition. These factors lead to the release of toxic metabolites and inflammatory cytokines, sustaining chronic inflammation in the pancreatic...