| ganglionic blockade | Inhibition of nerve impulse transmission at autonomic ganglionic synapses by drugs such as nicotine or hexamethonium. (05 Mar 2000) |
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| adrenergic blockade | Selective inhibition by a drug of the responses of effector cells to adrenergic sympathetic nerve impulses (sympatholytic) and to epinephrine and related amines (adrenolytic). (05 Mar 2000) |
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| blockade | 1. Intravenous injection of large amounts of colloidal dyes or other substances whereby the reaction of the reticuloendothelial cells to other influences (e.g., by phagocytosis) is temporarily prevented. 2. Arrest of peripheral nerve conduction or transmission at autonomic synaptic junctions, autonomic receptor sites, or myoneural junctions by a drug. (05 Mar 2000) |
| virus blockade | The interference of one virus by another, either attenuated or unrelated. (05 Mar 2000) |
| cholinergic blockade | Inhibition by a drug of nerve impulse transmission at autonomic ganglionic synapses (ganglionic blockade), at postganglionic parasympathetic effector cells (e.g., by atropine), and at myoneural junctions (myoneural blockade), the inhibition of a cholinergic agent. (05 Mar 2000) |
| myoneural blockade | Inhibition of nerve impulse transmission at myoneural junctions by a drug such as curare. (05 Mar 2000) |
| narcotic blockade | The use of drugs to inhibit the effects of narcotic substances, as with naloxone. (05 Mar 2000) |
| neuromuscular blockade | The intentional interruption of transmission at the neuromuscular junction by external agents, usually neuromuscular blocking agents. It is distinguished from nerve block in which nerve conduction is interrupted rather than neuromuscular transmission. Neuromuscular blockade is commonly used to produce muscle relaxation as an adjunct to anaesthesia during surgery and other medical procedures. It is also often used as an experimental manipulation in basic research. It is not strictly speaking anaesthesia but is grouped here with anaesthetic techniques. The failure of neuromuscular transmission as a result of pathological processes is not included here. (12 Dec 1998) |
| sympathetic blockade | Interruption of transmission in sympathetic ganglia or conduction of impulses in pre-or postganglionic sympathetic nerve fibres. (05 Mar 2000) |
| ganglionic | <anatomy> Pertaining to, containing, or consisting of, ganglia or ganglion cells; as, a ganglionic artery; the ganglionic columns of the spinal cord. Origin: Cf. F. Ganglionique. Source: Websters Dictionary (01 Mar 1998) |
| ganglionic blockers | Agents having as their major action the interruption of neural transmission at nicotinic receptors on postganglionic autonomic neurons. Because their actions are so broad, including blocking of sympathetic and parasympathetic systems, their therapeutic use has been largely supplanted by more specific drugs. They may still be used in the control of blood pressure in patients with acute dissecting aortic aneurysm and for the induction of hypotension in surgery. (12 Dec 1998) |
| ganglionic blocking agent | An agent that impairs the passage of impulses in autonomic ganglia. (05 Mar 2000) |
| ganglionic branches of lingual nerve | <anatomy, nerve> Motor roots of submandibular ganglion; communicating branches between submandibular ganglion and lingual nerve. Synonym: rami communicantes ganglii submandibularis cum nervo linguali, motor roots of submandibular ganglion. (05 Mar 2000) |
| ganglionic branches of maxillary nerve | <anatomy, nerve> The ganglionic branches, two short sensory branches of the maxillary nerve in the pterygopalatine fossa, the fibres of which pass through the pterygopalatine ganglion without synapse. Synonym: radix sensoria ganglii pterygopalatini, rami ganglionici nervi maxillaris, rami ganglionares, nervi pterygopalatini, nervi sphenopalatini, pterygopalatine nerves, sensory root of pterygopalatine ganglion. (05 Mar 2000) |
| ganglionic branch of internal carotid artery | <anatomy, artery> Branch to trigeminal ganglion; a small branch of the cavernous part of the internal carotid artery to the trigeminal ganglion. Synonym: ramus ganglii trigeminalis. (05 Mar 2000) |
| ganglionic crest | A group of embryonic cells that separate from the neural plate during neurulation and migrate to give several different lineages of adult cells: the spinal and autonomic ganglia, the glial cells of the peripheral nervous system and nonneuronal cells, such as chromaffin cells, melanocytes and some haemopoietic cells. (18 Nov 1997) |