jitter

(jĭt'ĕr),

The random variability of the cycle-to-cycle duration of vocal fold vibration; contributes to the perception of a rough or harsh voice quality.

Farlex Partner Medical Dictionary © Farlex 2012

Imaging Low amplitude irregularities in echo location on an ultrasound display, attributed to electronic noise, mechanical disturbances, and other nonspecific variables
Physiology Muscle jitter The normal electric variability—‘chaos’—measured by single-fiber EMG—in the interval between 2 action potentials of successive discharges of the same single muscle fiber in the same motor unit; jitter is characterised as instability in subcomponents of motor unit action potentials, and is due to the variation in the synaptic delay at the branch points in the distal axon and at the neuromuscular junction; like fiber density, jitter is increased in neuropathic conditions (motor neuron diseases)—e.g., myasthenia gravis—is accompanied by denervation and reinnervation, and attributed to inefficient transmission of impulses in recent neural collaterals, or due to blocking—abnormal neuromuscular transmission; it is normal or near-normal in myopathic disease
Psychology See Jitters

jitter

Imaging Low amplitude irregularities in echo location on an ultrasound display, attributed to electronic noise, mechanical disturbances, and other variables Neurophysiology Muscle jitter The normal electric variability–'chaos'–measured by single-fiber EMG–in the interval between 2 action potentials of successive discharges of the same single muscle fiber in the same motor unit; jitter is characterized as instability in subcomponents of motor unit action potentials, and is due to the variation in the synaptic delay at the branch points in the distal axon and at the neuromuscular junction; like fiber density, jitter is ↑ in neuropathic conditions–motor neuron diseases–eg, myasthenia gravis, is accompanied by denervation and reinnervation, and attributed to inefficient transmission of impulses in recent neural collaterals, or due to blocking–abnormal neuromuscular transmission; it is normal or near-normal in myopathic disease. See Fiber density, Single-fiber electromyography PsychologyJitters, see there.

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References in periodicals archive

The deterministic jitter is much higher than random jitter, and the deterministic jitter is dominated by duty cycle distortion.

Measuring digital clock stability and jitter with an oscilloscope

Jitter = 1/N-1 [[summation].sup.N-1.sub.i=1]|[T.sub.i]-[T.sub.i-1]|/1/N[[summation].sup.N.sub.i=1][T.sub.i] * 100 (1)

Diagnosing Vocal Disorders using Cobweb Clustering of the Jitter, Shimmer, and Harmonics-to-Noise Ratio

The microjitter measurement test results indicate that the application of the SMA mesh washer isolator is effective in reducing RWA-induced micro-jitter when mounting the RWA with a low rotational stiffness isolator, which is identical to the main jitter sources induced by the rotational movement of the RWA.

Experimental Validation of Fly-Wheel Passive Launch and On-Orbit Vibration Isolation System by Using a Superelastic SMA Mesh Washer Isolator

In this study, we found that both CN and SFN electrodes showed significantly increased jitter in ALS patients compared with healthy controls.

Quantitating Changes in Jitter and Spike Number Using Concentric Needle Electrodes in Amyotrophic Lateral Sclerosis Patients

The mean jitter values were analyzed as the calculation of the mean MCD of at least 20 consecutive discharges (9).

Jitter values on voluntary active periocular muscles of healthy subjects with conventional (37 mm) concentric needle electrode

Silicon Labs' clock jitter tool for PCIe technology features an intuitive graphical user interface that guides developers through the few simple steps required to compute clock jitter from an oscilloscope data file.

SILICON LABS INTRODUCES FREE SOFTWARE TOOL

In addition, the scheduler is calculated the required release time of all tasks to avoid the problem of task release jitter by placing SD mechanism around tasks which execute prior to other tasks in the same tick interval.

Effective scheduling algorithm and scheduler implementation for use with time-triggered co-operative architecture

The 28.6 Gb/s BERTScope supports higher levels of Sinusoidal Jitter (S.J) and other jitter impairments while maintaining low sub300 fs intrinsic jitter floor performance at key 100G data rates.

Tester handles severe jitters

The throughput of dropped packets is minimized while receiving throughput is maximized.Considering jitter NRTPS class is not analyzed due to its ill sensitiveness to delay and jitter.

A PARAMETRIC QOS ANALYSIS OF WIMAX SCHEDULING SERVICES

-Generates intrinsic jitter without any error as per G.823 standards

GL Announces Jitter Generation on T1 E1 Lines

The unwanted pulling of one VCO by another VCO right around the bandwidth of the victim's PLL proves to be problematic, especially for Telecommunication standards with close-in jitter specifications, for example, SONET OC-48 with jitter integration band specified from 12 kHz to 20 MHz offset from the carrier.

Low-jitter 0.1-to-5.8 GHz clock synthesizer for area-efficient per-port integration