Related Experiment Video
Updated: Jul 18, 2026
05:12
Chronic Intermittent Ethanol Vapor Exposure Paired with Two-Bottle Choice to Model Alcohol Use Disorder
Published on: June 23, 2023
Visual P300s in long-term abstinent chronic alcoholics
1Neurobehavioral Research Inc., Corte Madera, California 94925, USA. george@nbresearch.com
Alcoholism, Clinical and Experimental Research
|November 23, 2006
Summary
Long-term abstinent alcoholics show reduced P3b brain wave amplitudes, suggesting a potential endophenotypic marker for alcoholism. These P3b amplitude reductions persist even after prolonged abstinence and are not linked to alcohol use history.
Area of Science:
- Neuroscience
- Psychiatry
- Addiction Research
Background:
- Reduced P3b amplitudes in alcoholics suggest it may be an endophenotypic marker for alcoholism.
- Previous studies focused on short-term abstinence; this study investigates long-term abstinent alcoholics (LTAAs).
Purpose of the Study:
- To examine P3b and P3a event-related brain component amplitudes and latencies in LTAAs compared to normal controls (NCs).
- To determine if these measures correlate with alcohol use and other subject variables.
Main Methods:
- Recorded electroencephalographs (EEGs) from 48 LTAAs (mean abstinence 6.7 years) and 48 age/gender-matched NCs.
- Utilized a visual P300 experiment with standard, target, and rare nontarget conditions to elicit P3b and P3a components.
Main Results:
- LTAAs exhibited reduced P3b amplitudes and increased P3b latencies compared to NCs.
- LTAAs also showed delayed P3a components but no P3a amplitude reductions.
- No associations were found between alcohol use variables, family history, or abstinence duration with amplitude or latency measures.
Conclusions:
- Reduced P3b amplitudes persist in chronic alcoholics even after prolonged abstinence.
- Findings offer equivocal support for P3b amplitude as an endophenotypic marker for alcoholism.
- Results are consistent with P3b being affected by a threshold of alcohol abuse, with effects not resolving over time.
More Related Videos
Related Concept Videos
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...
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...
01:24Chronic 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...
01:27CNS 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...
01:29Chronic Pancreatitis II: Collaborative Care
The management of chronic pancreatitis is multifaceted, involving a comprehensive approach that includes thorough assessment, diagnostic testing, and a variety of management strategies.
Assessment:
Assessment:
01:24Cirrhosis II: Pathophysiology
Cirrhosis is a progressive chronic liver injury caused by prolonged inflammation, excessive fibrotic remodeling, and impaired regeneration. Over time, repeated hepatic insults disrupt the liver’s architecture and function, leading to reduced blood flow, impaired bile drainage, and diminished metabolic capacity.Pathophysiology of cirrhosisCirrhosis arises from three main responses to chronic liver damage: inflammation, immune activation, and hepatocyte death. These processes lead to structural...