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Dilation and constriction of the pupil. Pupillary response is a physiological response that varies the size of the pupil, via the optic and oculomotor cranial nerve.. A constriction response (), [1] is the narrowing of the pupil, which may be caused by scleral buckles or drugs such as opiates/opioids or anti-hypertension medications.
Nerves involved in the resizing of the pupil connect to the pretectal nucleus of the high midbrain, bypassing the lateral geniculate nucleus and the primary visual cortex. From the pretectal nucleus neurons send axons to neurons of the Edinger-Westphal nucleus whose visceromotor axons run along both the left and right oculomotor nerves .
The terms 'opioid' and 'opiate' are sometimes used interchangeably, but the term 'opioid' is used to designate all substances, both natural and synthetic, that bind to opioid receptors in the brain. [4] Opiates are alkaloid compounds naturally found in the opium poppy plant Papaver somniferum. [5] [6]
Now he’s gonna need a good lawyer.. A Florida defense lawyer was busted for allegedly smuggling legal documents soaked in the wild synthetic marijuana known as K2 into jail so inmates could get ...
Dollar Tree's same-store sales are up 1.8% from a year ago, beating the 1.38% expected, boosted by an increase in the average ticket and a 1.5% uptick in foot traffic. Its revenue of $7.56 billion ...
[5] [6] Commercial production of Wildnil ceased in 2003; the drug is now available only in compounded form. [7] Since then, etorphine has become the standard tranquilizing agent for large mammals, with diprenorphine as the preferred reversal agent. Diprenorphine was also used previously to reverse the effects of carfentanil. [8]
MEXICO CITY (Reuters) -Mexico is seeking an agreement with U.S. President-elect Donald Trump to ensure Mexico does not receive deportees from third countries in case of large-scale deportations ...
Pethidine is the most widely used opioid in labour and delivery. [16] It has fallen out of favour in some countries, such as the United States, in favour of other opioids, due to its potential drug interactions, especially with serotonergics, and its neurotoxic metabolite, norpethidine. [10]