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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,...
Types of Toxins01:36

Types of Toxins

Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
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...
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:
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Parkinson's disease arises from the...
Teratogenicity01:07

Teratogenicity

The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
Drug Toxicity: Risk factors01:24

Drug Toxicity: Risk factors

Adverse Drug Reactions (ADRs) are potential complications that arise during pharmacotherapy, influenced by multiple risk factors. Age plays a significant role; both neonates and the elderly are at heightened risk due to their respective immature and diminished metabolic and elimination processes. Gender also impacts ADRs, with females experiencing a 1.5 to 1.7-fold greater risk than males, which may be linked to pharmacokinetic, pharmacodynamic, and hormonal differences. Notably, neonates, the...

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Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
19:15

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale

Published on: August 25, 2014

Postnatal toxic and acquired disorders.

Dave Saint-Amour1, Renee Dallaire, Oliver Dulac

  • 1Research Center, Centre Hospitalier Universitaire Sainte-Justine, Montreal, Quebec, Canada.

Handbook of Clinical Neurology
|April 30, 2013
PubMed
Summary
This summary is machine-generated.

Organ dysfunction can harm developing brains, leading to toxic-metabolic encephalopathies. Thyroid, kidney, and cardiovascular issues, along with toxins, significantly impact child neurological development and brain function.

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Area of Science:

  • Neuroscience
  • Toxicology
  • Pediatrics

Background:

  • Optimal brain development relies on a balanced internal environment.
  • Organ dysfunction can disrupt this balance, leading to brain disorders and toxic-metabolic encephalopathies.
  • These complications are particularly severe during early cerebral maturation.

Purpose of the Study:

  • To discuss induced toxicity in three organ systems linked to brain complications.
  • To highlight the impact of organ dysfunction on child brain development and function.

Main Methods:

  • Review of literature on thyroid hormone deficiency, chronic renal failure, and cardiovascular defects.
  • Analysis of toxic-metabolic encephalopathies resulting from organ dysfunction.
  • Examination of neurological complications in pediatric patients.

Main Results:

  • Thyroid hormone deficiency can cause reversible impairments or permanent mental retardation in children.
  • Chronic renal failure leads to toxin accumulation, increasing brain vulnerability to substances like aluminum, causing aluminum encephalopathy.
  • Cardiovascular issues can result in neurological problems, including seizures and focal defects, especially when combined with immunomodulating substances.

Conclusions:

  • Organ disorders significantly impact child brain function through various mechanisms.
  • Early intervention and management of organ dysfunction are crucial for preventing severe neurological sequelae.
  • Understanding these toxic-metabolic pathways is essential for pediatric neurology and critical care.