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Answer for the clue "A convolution of brain surgery ordered without hesitation ", 5 letters:
gyrus

Alternative clues for the word gyrus

Word definitions for gyrus in dictionaries

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Gyrus \Gy"rus\ (j[imac]"r[u^]s), n.; pl. Gyri (j[imac]"r[imac]). [L. See Gyre , n.] A convoluted ridge between grooves; a convolution; as, the gyri of the brain; the gyri of brain coral. See Brain .

WordNet Word definitions in WordNet
n. a convex fold or elevation in the surface of the brain [syn: convolution ] [also: gyri (pl)]

Wikipedia Word definitions in Wikipedia
In neuroanatomy , a gyrus (pl. gyri ) is a ridge on the cerebral cortex . It is generally surrounded by one or more sulci (depressions or furrows; sg. sulcus ). Gyri and sulci create the folded appearance of the brain in humans and other mammals .

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
convolution between grooves, 1842, from Latin gyrus "circle, circuit, career," from Greek gyros "ring, circle" (see gyre ).

Wiktionary Word definitions in Wiktionary
n. (context anatomy English) A ridge or fold on the cerebral cortex.

Usage examples of gyrus.

When activated,ACMPD 3N7 seemed to modify responses of the amygdala and cingulate gyrus in the brain.

The patent claims effects on neurotransmitter potentials in the cingulate gyrus.

Calibrate the neurotracer to monitor at the cingulate gyrus, isthmus, hippocampal gyrus, uncus, and hippocampus.

Recent research in neuroanatomy has characterised the nature of the stellate ganglial networks responsible for gorgonism in patients with advanced astrocytoma affecting the cingulate gyrus.

The lower half of the ascending frontal convolution, the greater half of the sigmoid gyrus, the posterior third of the lower and middle frontal convolutions, the base and posterior end of the upper convolution, and the base of the corresponding portion of the falciform lobe were involved.

I reckon soap in the parahippocampal gyrus may cause compulsive behaviour disorder.

When they then stimulated the perforant pathway with a train of electrical impulses, at the rate of 10-100 per second for up to 10 seconds, they found an extraordinarily long-lasting increase in the firing of the hippocampal neurons of the dentate gyrus, persisting for up to ten hours.

I observed an alternating contraction and relaxation of her muscles due possibly to an excess discharge of diethylmonohoganide in the large cortical area in the precentral gyrus.

To hear it you will need a frontal lobe and things with names like colliculus and temporal gyrus and you wont have them anymore.

Recent research in neuroanatomy has characterised the nature of the stellate ganglial networks responsible for gorgonism in patients with advanced astrocytoma affecting the cingulate gyrus.

The sulci and gyri are fairly standardized from brain to brain, and the more prominent ones are named and mapped.

Beneath the membranes, the gyri and folds of the cerebral cortex were plainly visible, traced with darker arteries and veins.

This includes difficulties in memory, speech, and coordination, due to brain oxygen starvation in the orbital gyri of both frontal lobes, as well as the cerebral choroid plexus.

The gyri were plump and choked with fluid, and she saw the bruise at once: a purplish-black splotch fanning around the implant like a squashed bug.

I would release a worm to write her name in every angular gyrus from here to Thailand.