excitation


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Related to excitation: excitation voltage, Excitation Contraction Coupling

excitation

 [ek″si-ta´shun]
an act of irritation or stimulation; a condition of being excited or of responding to a stimulus; the addition of energy, as the excitation of a molecule by absorption of photons.
anomalous atrioventricular excitation Wolff-Parkinson-White syndrome.
indirect excitation electrostimulation of a muscle by placing the electrode on its nerve.

ex·ci·ta·tion

(ek'sī-tā'shŭn),
1. The act of increasing the rapidity or intensity of the physical or mental processes.
See also: stimulation.
2. In neurophysiology, the complete all-or-none response of a nerve or muscle to an adequate stimulus, ordinarily including propagation of excitation along the membranes of the cell or cells involved.
See also: stimulation.

excitation

/ex·ci·ta·tion/ (ek″si-ta´shun)
2. the addition of energy, such as excitation of a molecule by absorption of photons.

direct excitation  electrostimulation of a muscle by placing the electrode on the muscle itself.
indirect excitation  electrostimulation of a muscle by placing the electrode on its nerve.

excitation

(ĕk′sī-tā′shən)
n.
1. The act or process of exciting or an instance of it.
2. The state or condition of being excited.
3. Physiology The activity produced in an organ, tissue, or part, such as a nerve cell, as a result of stimulation.

excitation

[ek′sitā′shən]
Etymology: L, excitare, to arouse
nerve or muscle action as a result of impulse propagation; a state of mental or physical excitement.

excitation

An MRI term for the delivery—i.e., induction or transfer—of energy into spinning nuclei via radio-frequency pulse(s), which bumps the nuclei into a higher energy state. By producing a net transverse magnetisation, an MRI system can evoke a response from the excited system.

ex·ci·ta·tion

(ek'sī-tā'shŭn)
1. The act of increasing the rapidity or intensity of physical or mental processes.
2. neurophysiology The complete all-or-none response of a nerve or muscle to an adequate stimulus, ordinarily including propagation of excitation along the membranes of the cell or cells involved.
See also: stimulation
3. The process whereby radiation causes a bound electron to vibrate or oscillate within its orbit.

excitation

the process by which the electrical stimulation of
  1. a surface membrane results in contraction of the muscle, or
  2. brings about secretion of a transmitter substance at a nerve ending.

excitation

all-or-nothing response of nerve or muscle tissue to an adequate stimulus

ex·ci·ta·tion

(ek'sī-tā'shŭn)
Act of increasing the rapidity or intensity of the physical or mental processes.

excitation (eksītā´shən),

n the addition of energy to a system, thereby transferring it from its ground state to an excited state.

excitation

an act of irritation or stimulation; a condition of being excited or of responding to a stimulus; the addition of energy, as the excitation of a molecule by absorption of photons.

excitation-conduction-contraction
in the stimulation of muscle contraction this is the coupling which occurs at the sarcolemma-sarcoplasmic reticulum junction. Mediated by the release of calcium ions in the aqueous sarcoplasm.
excitation-contraction coupling
conversion of an excitation stimulus into contraction of the effector muscle fiber; ionic calcium is the link between the two.
indirect excitation
electrostimulation of a muscle by placing the electrode on its nerve.
excitation-secretion
in the stimulation of muscular contraction this is the stimulation of secretion of acetylcholine from the vesicles in the cholinergic nerve terminals into the synaptic cleft at the nerve-muscle junction.
excitation signs
see irritation nervous signs.

Patient discussion about excitation

Q. I am excited to know in what way diet helps in preventing osteoporosis? my mother is suspecting to be having osteoporosis. She regularly complains of leg pain. Upon consultation with the doctor it was found with low calcium in her blood. She was given calcium tablets and was told to increase in the diet rich in calcium. She is taking milk and yoghurt especially. She is not well yet but shows some improvement. I am excited to know in what way diet helps in preventing osteoporosis?

A. you see, our bones are a giant storage of calcium. our body needs a very steady concentration of calcium, if it'll be low the body will take it form your bones. if there's too much- it'll either build bones (but only if he'll think he needs too- that is where sport get in the picture)or you'll urinate it.any way, you rather have large amount of calcium in your diet then less. but it's not enough- sport and other medication can help.

Q. my wife is pregnant !!! i am so excited ! this is the first time out of many i hope !!! but i have concerns that i would like to share with the community here ... i am afraid of being a bad father , i am afraid i won't know how to be a father ... where do u start ... how do i support my wife after the though experince ... how do i take care of the child ... a lot of things a re running through my mind with no answer ,can any one help me to calm down ????

A. you won't be a perfect father but you'll try to be. that's what's important. thousands of years of evolution gave you the basics. you'll be fine :)
congratulations!!

Q. Hello everyone !!! are you excited with the swearing of Obama To presidency??? i sure am !!! may we all get a little joy and peaceful time wit hour fresh president ... and let us all wish him a great start and a chance to change our lives ... Good Luck Mr.President Obama !!!

A. well said Mrfoot65! May all the people in America receive the healthcare treatment they need. God bless.

More discussions about excitation
References in periodicals archive ?
In the middle part (corresponds to middle part of the dorsal side of the left atrium) at temperature of 36[degrees]C and 35[degrees]C the presence of several zones of early and late depolarization is observed since in this area the front of excitation is divided into two waves and begins to disperse.
Peg's tip vibration magnitude was investigated under different pressing forces F1 (vibrator to the peg) and F2 (peg to the bushing) when excitation frequency v varies from 6523 to 6723 Hz, and tip movement trajectory was defined in relation with misalignment position [DELTA].
5 mV/V, and 0 mV/V, and for each of two excitation conditions: +10 VDC and -10 VDC.
Due to the fact that fewer materials fluoresce at longer excitation wavelengths, wavelengths like 1064nm allow for a more comprehensive range of materials to be analyzed, particularly within biopharm applications.
First condition considers the sample as a solid structure, meaning that the excitation parameters are evenly dispersed throughout the sample allowing proper analysis of drilling forces.
Fluorescence microscopy has traditionally been performed using bandpass filters to isolate peak fluorescence excitation and emission wavelengths for fluorescent labels.
We report on new level-resolved calculations for the dielectronic recombination and collisional excitation of the low charge states of argon.
The TTR20, a complement to the world-renowned hand-cranked TTR, measures turns ratio, polarity and excitation current in single-phase and three-phase transformers, current and potential transformers as well as voltage regulators.
The instruction for the excitation of cantilever modes was proposed based on the obtained results and material properties to obtain better image contrast.
The dominant component of the summing signal is a constant resulting from direct coupling from the excitation coil, which can be experimentally determined.
Modal Tests--the identification of the parameters of the vibrating bridge structure itself, which are independent of the type of excitation.