(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).
Twitch
Definition:
(v. t.) To pull with a sudden jerk; to pluck with a short, quick motion; to snatch; as, to twitch one by the sleeve; to twitch a thing out of another's hand; to twitch off clusters of grapes.
(n.) The act of twitching; a pull with a jerk; a short, sudden, quick pull; as, a twitch by the sleeve.
(n.) A short, spastic contraction of the fibers or muscles; a simple muscular contraction; as, convulsive twitches; a twitch in the side.
(n.) A stick with a hole in one end through which passes a loop, which can be drawn tightly over the upper lip or an ear of a horse. By twisting the stick the compression is made sufficiently painful to keep the animal quiet during a slight surgical operation.
Example Sentences:
(1) Comparison of the S100 alpha-binding protein profiles in fast- and slow-twitch fibers of various species revealed few, if any, species- or fiber type-specific S100 binding proteins.
(2) Twitch-tetanus ratios were calculated and found not to be related to unit contraction time.6.
(3) Hyperosmolar buffer slightly increased the sensitivity and maximal response to methacholine as well as the cholinergic twitch to electric field stimulation.
(4) The present results suggest that TMB-8 blocks twitches by preventing the release of Ca++ ions bound to the intracellular surface of the t-tubular membrane which is often called the store of 'trigger-calcium' ions.
(5) The twitches elicited by 0.1 msec pulses were abolished by tetrodotoxin, but were not reduced by dimethyltubocurarine or by hexamethonium.
(6) Starting from the observation that the part above 6 Hz of the power spectrum of force tremor during isometric contractions can be related to the unfused twitches of motor units firing asynchronously, an attempt was made to study the usefulness of force tremor spectral analysis as a global descriptor of motoneurone pool activity.
(7) The soleus, deep portions of the vastus lateralis, and superficial portions of the vastus lateralis muscles were examined to represent slow-twitch-oxidative, fast-twitch-oxidative-glycolytic, and fast-twitch-glycolytic skeletal muscle fiber types, respectively.
(8) Epinephrine potentiates muscle twitches via the second messenger, cAMP, secondary to hormone binding to membrane-bound beta-receptors.
(9) In physiological studies CDS mimics clonidine's action as an inhibitor of the electrically induced twitch response and as a partial agonist of the epinephrine-induced platelet aggregation.
(10) Facial twitch was followed by the generalized convulsion, further progressing to trembling of the limbs and then kicking of the hindlimb (full seizure) after 55 days of age.
(11) Stimulating the dorsal root at L5 was found to produce hindleg twitches in EAE rats with complete hindlimb paralysis.
(12) The anesthesiologist assessed the degree of neuromuscular blockade intraoperatively prior to pharmacologic reversal either by the standard method of visually counting the number of evoked thumb twitches elicited by supramaximal train-of-four stimulation of the ulnar nerve (i.e., thumb train-of-four count), or by an alternative method such as 1) visually counting the number of evoked orbicularis oculi muscle twitches elicited by supramaximal train-of-four stimulation of the facial nerve, or 2) observing the patient for clinical evidence of partial recovery (e.g., swallowing or attempts to breathe).
(13) Measurements of mouth opening were made for up to 10 min after loss of the adductor pollicis twitch and cessation of muscle fasciculations.
(14) On the other hand, the lack of any twitch-potentiating effect by naloxone methylbromide, a quaternary derivative of naloxone, suggests that opioids which potentiate the twitch must enter the lipid phase of the membrane to act.
(15) The relaxant effect of catecholamines on the twitch is temperature and rate dependent.
(16) Disopyramide 5 X 10(-5) - 10(-3) mol litre-1 produced a concentration-dependent reduction of twitch amplitude in the indirectly stimulated chick biventer cervicis preparation, but greater concentrations were required to reduce twitches elicited directly in the presence of erabutoxin-b 1 microgram ml-1.
(17) The pigeon's metapatagialis muscle consists of three slips, two twitch and one tonic, and these slips are distinguishable at the gross anatomical level.
(18) There was a good correlation between the two methods of measurement for both twitch height and train-of-four ratio (correlation coefficients 0.93 and 0.97, respectively).
(19) Head twitches induced by 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI) could be abolished by low doses of RP 62203 in mice (ED50 = 0.44 mg kg-1, p.o.)
(20) Chronic stimulation of the denervated SOL resulted in twitch times-to-peak and half-relaxation times that varied in a graded manner between values longer than those in the normal SOL to values as fast as those in the normal EDL, depending upon the pattern used.