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Opioid

Any natural or synthetic drug that has pharmacological actions similar to those of morphine.

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  • Category: Neuroscience
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Related terms

opioid
Biology; Neuroscience

Any natural or synthetic drug that has pharmacological actions similar to those of morphine.

opioid
Health care; Drug rehabilitation

Any chemical that has opiate-like effects; commonly used to refer to neurochemicals that activate opiate receptors (see Opiate Receptors).

opioid
Health care; Cancer treatment

A substance used to treat moderate to severe pain. Opioids are like opiates, such as morphine and codeine, but are not made from opium. Opioids bind to opioid receptors in the ...

endogenous opioids
Biology; Neuroscience

Peptides in the central nervous system that have the same pharmacological effects as morphine and other derivatives of opium.

opioid addiction
Health care; Pharmacy

A behavioral pattern manifesting as loss of control over opioid use, compulsive use, and continued use despite harm.

opioid peptide
Medical; Health care; Medicine

The endogenous peptides with opiate-like activity. The three major classes currently recognized are the enkephalins, the dynorphins, and the endorphins. Each of these families ...

medial longitudinal fasciculus
Biology; Neuroscience

Axon tract that carries excitatory projections from the abducens nucleus to the contralateral oculomotor nucleus; important in coordinating conjugate eye movements.

commissures
Biology; Neuroscience

Axon tracts that cross the midline of the brain. See also anterior commissure.

postganglionic axons
Biology; Neuroscience

Axons that link visceral motor neurons in autonomic ganglia to their targets.

climbing fibers
Biology; Neuroscience

Axons that originate in the inferior olive, ascend through the inferior cerebellar peduncle, and make terminal arborizations that invest the dendritic tree of Purkinje cells.

saccades
Biology; Neuroscience

Ballistic, conjugate eye movements that change the point of foveal fixation.

olfactory receptor neurons (ORNs)
Biology; Neuroscience

Bipolar neurons in olfactory epithelium that contain receptors for odorants.

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