Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to excitability: overwhelmingly, ho-hum, conductivity, conferred, waylaid


1. ability of an organism or a specific tissue to react to the environment.
2. the state of being abnormally responsive to slight stimuli, or unduly sensitive.
myotatic irritability the ability of a muscle to contract in response to stretching.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Having the capability of being excitable.
Farlex Partner Medical Dictionary © Farlex 2012


Having the capability of being excited. The cellular property that enables it to react to irritation or stimulation.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


The property of any cell or tissue capable of producing an electric signal.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005


any change in membrane conductance as a response to stimulation.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Patient discussion about excitability

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 :)

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 excitability
This content is provided by iMedix and is subject to iMedix Terms. The Questions and Answers are not endorsed or recommended and are made available by patients, not doctors.
References in periodicals archive ?
Effects of low versus high frequencies of repetitive transcranial magnetic stimulation on cognitive function and cortical excitability in Alzheimer's dementia.
The DCS supplies a weak electrical current of 1 or 2 mA to the brain via two surface electrodes on the head skin to facilitate (anodal stimulation) or inhibit (cathodal stimulation) cortical excitability of the stimulated brain area [5].
In this regard, this study aimed to explore the alteration of genioglossus corticomotor excitability using TMS and its EMG activity over time after IH stimulation at different stages of CIH in rats.
Repetitive activation of these fibers induces inhibitory and/ or excitatory neurotransmitter release into the synaptic cleft that can modulate the excitability threshold, that is, the electrophysiological properties of the resting motor neuron membrane.
Objectives: The aim of this study was to investigate the immediate effects of facilitatory and inhibitory kinesiotaping on motor neuron excitability.
Concerning parameters related to excitability, the rheo-base and chronaxie values of control conditions were 3.4 [+ or -] 0.1 V and 58.8 [+ or -] 1.5 [micro]s (n = 6; Figure 2E).
"In Tourette's syndrome, if we could reduce the excitability we might reduce the ticks, and that's what we are working on," he said. 
Intermittent TBS (iTBS) in which a 2 sec train of stimulation (10 bursts) is followed by 8 sec pause significantly increases the motor cortex excitability, when applied to the ipsilesional hemisphere.
A study published in the Journal of the American College of Nutrition has shown that oral ATP administration prevents exercise-induced declines in ATP while enhancing peak power and muscular excitability (the ratio of power output to muscle activation).
Indeed, it is able to provide novel insights into the pathophysiology of the neural circuitry underlying neurological and psychiatric diseases and to give in vivo information about the excitability of the human brain cortex and the conduction along corticospinal tract as well as the functional integrity of intracortical neuronal and callosal fibers [35-37].
Comment: Omega-3 fatty acids inhibit neuronal excitability and reduce seizures in animal models of epilepsy.