What does neurotoxic mean?
Definition. Neurotoxicity occurs when the exposure to natural or manmade toxic substances (neurotoxicants) alters the normal activity of the nervous system. This can eventually disrupt or even kill neurons, key cells that transmit and process signals in the brain and other parts of the nervous system.
What are neurotoxic symptoms?
Symptoms of neurotoxicity include memory and concentration problems; confusion; multiple sclerosis or MS-type symptoms; impaired control of the limbs, bladder, or bowels; headaches or migraines; sleep disorders, including sleep apnea; eye problems that are neurological in origin; balance and hearing problems; muscle …
What substances are neurotoxic?
Some examples of substances that can be neurotoxic to humans include:
- Chemotherapy drugs that are used to kill fast growing cells.
- Radiation.
- Drug therapies or drugs of abuse.
- Heavy metals such as mercury and lead.
- Certain foods and food additives.
- Insecticides/pesticides.
- Cosmetics.
- Industrial and cleaning solvents.
What is neurotoxic metal?
A chemical is considered to be neurotoxic if it is capable of inducing a consistent pattern of neural dysfunction or lesion in the nervous system. Several metals are known as neurotoxic.
What does a Hemotoxin do?
Hemotoxins cause hemolysis, the destruction of red blood cells (erythrocytes), or induce blood coagulation (clotting).
Can neurotoxicity go away?
Perturbations may appear and disappear rapidly, evolve slowly over days or weeks and regress over months or years, or have permanence if they are acquired during development. Neurotoxicity is usually self-limiting after exposure ceases and rarely progressive in the absence of continued exposure.
Is alcohol a neurotoxic?
Studies clearly indicate that alcohol is neurotoxic, with direct effects on nerve cells. Chronic alcohol abusers are at additional risk for brain injury from related causes, such as poor nutrition, liver disease, and head trauma.
Which snake venom is neurotoxic?
Elapid snakes—including coral snakes, cobras, mambas, sea snakes, and kraits—have primarily neurotoxic venom. In contrast, vipers—including rattlesnakes, copperheads, and cottonmouths—have primarily hemotoxic venom. However, these characterizations of venoms by type of snake are not consistent.
Which heavy metals are toxic to humans?
The heavy metals most commonly associated with poisoning of humans are lead, mercury, arsenic and cadmium. Heavy metal poisoning may occur as a result of industrial exposure, air or water pollution, foods, medicines, improperly coated food containers, or the ingestion of lead-based paints.
Why are heavy metals neurotoxic?
The brain readily accumulates metals, which under physiologic conditions are incorporated into essential metalloproteins required for neuronal health and energy homeostasis. Severe consequences can arise from circumstances of excess essential metals or exposure to toxic nonessential metal.
What is Hemotoxin venom?
Hemotoxins, haemotoxins or hematotoxins are toxins that destroy red blood cells, disrupt blood clotting, and/or cause organ degeneration and generalized tissue damage. Injury from a hemotoxic agent is often very painful and can cause permanent damage and in severe cases death.