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Related Concept Videos

Toxic Reactions: Overview01:26

Toxic Reactions: Overview

When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
Drug Toxicity: Dose-Dependent Reactions01:24

Drug Toxicity: Dose-Dependent Reactions

Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...
Local Anesthetics: Adverse Effects01:12

Local Anesthetics: Adverse Effects

While local anesthetics are generally safe and well-tolerated, they can occasionally cause adverse effects that vary in severity. Local anesthetics can induce toxicity at two distinct levels. They can either produce local effects through direct contact with the neural elements or be absorbed into the bloodstream from the injection site, leading to systemic effects.
Once absorbed into the systemic circulation, local anesthetics can affect the organs that depend on the functioning of sodium...
Diabetic Neuropathy01:22

Diabetic Neuropathy

DefinitionDiabetic neuropathy is nerve damage caused by long-standing diabetes mellitus. It results directly from prolonged high blood sugar levels.PathophysiologyThe pathophysiology of diabetic neuropathy involves both metabolic and vascular disturbances triggered by chronic hyperglycemia.Metabolic injury: Elevated glucose levels activate the polyol pathway within nerve cells, leading to the accumulation of sorbitol and fructose. This increases oxidative stress, disrupts normal nerve...
Disorders of the Nervous Tissue01:28

Disorders of the Nervous Tissue

Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
Homeostatic Imbalances:
Alzheimer's disease manifests as a gradual decline in memory and cognitive abilities, attributed to the buildup of amyloid plaques and neurofibrillary tangles in the brain.
Parkinson's disease arises from the...
Drug Toxicity: Overview01:00

Drug Toxicity: Overview

Drug toxicity quantifies the harm a compound causes to an organism, varying by dose and potentially impacting whole systems or specific organs like the liver. Toxic reactions may arise from venomous insect or spider bites, with effects ranging from mild symptoms to severe outcomes such as brain damage or death. Common forms of acute poisoning include ethanol intoxication and overdose of pain or fever medications, with substances like GHB and heroin being particularly lethal at doses close to...

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Related Experiment Video

Updated: Jun 16, 2026

Nerve Excitability Assessment in Chemotherapy-induced Neurotoxicity
07:42

Nerve Excitability Assessment in Chemotherapy-induced Neurotoxicity

Published on: April 26, 2012

Toxic neuropathies.

Usha Kant Misra1, Jayantee Kalita

  • 1Department of Neurology, Sanjay Gandhi PGIMS, Lucknow, India. ukmisra@sgpgi.ac.in

Neurology India
|February 9, 2010
PubMed
Summary
This summary is machine-generated.

Toxic neuropathies, often axonal, can stem from various causes like arsenic, lead, organophosphates, and alcohol. Greater awareness is needed for these preventable nerve conditions.

Related Experiment Videos

Last Updated: Jun 16, 2026

Nerve Excitability Assessment in Chemotherapy-induced Neurotoxicity
07:42

Nerve Excitability Assessment in Chemotherapy-induced Neurotoxicity

Published on: April 26, 2012

Area of Science:

  • Neurology
  • Toxicology
  • Occupational Health

Background:

  • Toxic neuropathies are nerve disorders caused by exposure to harmful substances.
  • While many toxic neuropathies are length-dependent axonal, exceptions like diphtheria exist.
  • Geographical and occupational factors influence the prevalence of specific toxic neuropathies.

Purpose of the Study:

  • To review the diverse causes and presentations of toxic neuropathies.
  • To highlight the need for increased awareness and preventive measures for toxic neuropathies.

Main Methods:

  • Literature review of toxic neuropathies.
  • Analysis of etiological factors including environmental, occupational, and iatrogenic exposures.
  • Discussion of clinical manifestations and geographical variations.

Main Results:

  • Diphtheritic neuropathy is underreported in India despite disease occurrence.
  • Arsenic neuropathy is linked to groundwater/opium contamination in specific regions.
  • Lead neuropathy causes motor deficits (foot/wrist drop); organophosphates induce delayed axonal neuropathy.
  • Alcohol-related neuropathy is debated (toxicity vs. deficiency); hexane neuropathy affects screen printers.
  • Iatrogenic causes include cisplatin and vincristine.

Conclusions:

  • Toxic neuropathies are likely more common than reported due to various factors.
  • Enhanced awareness and improved preventive/occupational measures are crucial for managing toxic neuropathies.