(v. t.) To cut into long slices or strips and dry in the sun; as, jerk beef. See Charqui.
(v. t.) To beat; to strike.
(v. t.) To give a quick and suddenly arrested thrust, push, pull, or twist, to; to yerk; as, to jerk one with the elbow; to jerk a coat off.
(v. t.) To throw with a quick and suddenly arrested motion of the hand; as, to jerk a stone.
(v. i.) To make a sudden motion; to move with a start, or by starts.
(v. i.) To flout with contempt.
(n.) A short, sudden pull, thrust, push, twitch, jolt, shake, or similar motion.
(n.) A sudden start or spring.
Example Sentences:
(1) The EMG silent periods (SP) produced in the open-close-clench cycle and jaw-jerk reflex were compared for duration before and after treatment with an occlusal bite splint.
(2) While tonic pupil and reduced sweating can be attributed to the affection of postganglionic cholinergic parasympathetic and sympathetic fibres projecting to the iris and sweat glands, respectively, the pathogenesis of diminished or lost tendon jerks remains obscure.
(3) In reflex-induced jerks this negative transient could be recognized as a component of the sensory evoked potential.
(4) A dynamic optimization technique to minimize jerk cost under the constraint on jerk input was applied to interpret the results, assuming that a major goal of skilled movements was to produce optimally smooth movements.
(5) The Peppers like to be jerks (at Dingwalls Swan dedicated a song to “all you whiney Britishers who can suck my American cock”), but don’t let the surface attitude fool you.
(6) Results from animal experiments and neuropathological studies suggest that the abolition of jerks in such cases is probably due to loss of facilitating influences from the cerebral cortex and central grey nuclei.
(7) Surgery caused or aggravated unilaterally diminished knee or ankle jerks in 3% and 10% of cases, respectively.
(8) This is a gladiatorial display – that is what people go to see.” Bray added: “The popular knee-jerk reaction will be we should ban airshows, but it’s very rare for such a crash to take place.
(9) High-frequency trading may or may not distort markets, but surely a knee-jerk reaction by banning it is not the answer.
(10) In order to overcome various drawbacks of the conventional polygraphic study of a relationship between myoclonus and EEG, the EEG preceding and following the myoclonic jerk was simultaneously averaged by the CNV program.
(11) Compared with the myoclonic-serotonergic syndrome evoked by 5-hydroxytryptophan in rats with 5.7-dihydroxytryptamine lesions, harmaline+5-hydroxytryptophan-treated rats displayed more continuous and greater axial myoclonic jerks and some postural differences.
(12) The effects of electrical stimulation and microinjection of sodium glutamate (0.5 M) in the sympathetic pressor areas of the dorsal medulla (DM), ventrolateral medulla (VLM), and parvocellular nucleus (PVC) on the knee jerk, crossed extension, and evoked potential of the L5 ventral root produced by intermittent electrical stimulation were studied in 98 adult cats anesthetized with chloralose and urethane.
(13) The knee jerk itself is seen as a "physiological artefact," resulting from a mode of stimulation that does not occur in life, with the normal function of its underlying circuitry still under debate.
(14) The patients did not significantly differ from controls on catch-up saccade amplitude, square wave jerk rate, or anticipatory saccade rate.
(15) It was confirmed that the technique of jerk-locked averaging with a backward averaging program was useful for detecting cortical spikes in association with the spontaneously occurring myoclonus, which are not recognized on the convential polygraph, and for evaluating the temporal and topographical relationship between the spike and the myoclonus.
(16) The typical electrophysiological correlates of myoclonus in Alzheimer's disease are similar to those of cortical reflex myoclonus, with a focal, contralateral negativity in the EEG preceding the myoclonic jerk.
(17) The analgesic effect of morphine in the rat tail jerk assay was enhanced by the serotonin uptake inhibitor, fluoxetine.
(18) In focal epileptic status, the single dose stopped paroxysmal activity and the associated clonic jerks for a few seconds.
(19) The occurrence of horizontal jerks with larger amplitudes than on Earth was observed during vertical optokinetic nystagmus in astronauts tested throughout a 7-day spaceflight.
(20) Only one patient felt his knee to be unstable (he had a positive pivot jerk).
Yerk
Definition:
(v. t.) To throw or thrust with a sudden, smart movement; to kick or strike suddenly; to jerk.
(v. t.) To strike or lash with a whip.
(v. i.) To throw out the heels; to kick; to jerk.
(v. i.) To move a quick, jerking motion.
(n.) A sudden or quick thrust or motion; a jerk.
Example Sentences:
(1) The results were in agreement with the Yerkes-Dodson law in that the optimal physiological activation level for rapid performance varied with the degree of task difficulty, relatively lower activation being more favorable the more difficult the task.
(2) Chromobacteriosis caused by Chromobacterium violaceum was diagnosed as an Assam macaque, Macaca assamensis, that died 4 days after receipt of the Yerkes Primate Center, It was received from a primate facility in Florida where it has been housed with a group of rhesus monkeys for 5 years.
(3) The Yerkes Regional Primate Research Center has successfully bred chimpanzees since 1930.
(4) The results are discussed within the theoretical framework of the Yerkes-Dodson Law, which states a relationship between drive level, performance and different degrees of task difficulty.
(5) This paper describes the incidence of multiple births in the Yerkes Chimpanzee colony for a period of about 63 years.
(6) Greater than 75% of the sooty mangabey monkeys at the Yerkes Regional Primate Research Center are naturally infected with SIV without any apparent clinical symptomology.
(7) The apparatus was modified Yerkes discrimination apparatus.
(8) The relationship between arousal and efficiency of the brain is shown by the inverted U of the Yerkes-Dodson curve.
(9) The infants and their mothers lived as members of a captive social group at the Yerkes Regional Primate Research Center.
(10) The American Psychological Association Committee on Precautions in Animal Experimentation was founded in 1925 at the instigation of Walter B. Cannon, with Robert M. Yerkes as the first chair.
(11) Healthy mangabey monkeys in a colony at the Yerkes Regional Primate Research Center were found to be infected with a retrovirus related to human immunodeficiency virus (HIV).
(12) This article also reviews the literature on memory for stressful events with respect to two major theories: the Yerkes-Dodson law and Easter-brook's cue-utilization hypothesis.
(13) The results indicate that most if not all SIV-seronegative mangabeys from the colony at the Yerkes Primate Center are in fact infected with SIVsmm despite their lack of humoral immune response, confirming previous immunological and virological observations made by our laboratory.
(14) The analysis of behavioural sequences makes it probable that, according to the criteria of Yerkes and Hassenstein, we are dealing with problem-solving behaviour guided by regrouping of engrams.