Innervation


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innervation

[‚in·ər′vā·shən]
(anatomy)
The distribution of nerves to a part.
(physiology)
The amount of nerve stimulation received by a part.

Innervation

 

the supply of nerves to organs and tissues, which provides for their communication with the central nervous system (CNS).

A distinction is made between afferent (centripetal) and efferent (centrifugal) innervation. Signals about the condition of an organ and the processes taking place in it are perceived by sensitive nerve endings (receptors) and transmitted to the CNS over the centripetal fibers. The responses that regulate the functioning of the organs are transmitted along the centrifugal nerves, enabling the CNS to keep regulating and altering the activity of organs and tissues in accordance with the body’s requirements. The function-regulating role of the CNS is different for different organs. In some organs (for example, in skeletal muscle or salivary gland) the signals from the CNS determine their entire activity, so that complete disconnection from the CNS, or denervation, results in atrophy of the organ involved. Some organs (for example, the heart and intestine) can act under the influence of impulses originating in the organs themselves. In these cases, denervation does not result in atrophy but only limits, to some extent, the adaptive reactions, which persist both because of humoral regulation and because of the presence of a nervous system within the organ.

G. N. KOSITSKH and I. N. D’IAKOVA

References in periodicals archive ?
The presence of normal, intact innervation is essential for maintaining the normal modality and function of mammalian organs.
20) It provides motor innervation to the coracobrachialis, biceps and brachialis muscles.
Interestingly, Shin and colleagues [43] have demonstrated that removal of the endogenous serotonin innervation by specific toxin lesions appeared to abolish the anti-GID properties of the 5-HT1A and 5-HT1B agonists, suggesting that the effect of these drugs on GID is conceivably mediated by the activation of presynaptic host-derived receptors.
1986) A comparative light microscopic analysis of the sensory innervation of the mystacial pad.
The innervation of the spinal dura mater: anatomy and clinical implications.
Unusual ulnar sensory innervation and Martin-Gruber anastomosis in a patient with a carpal tunnel syndrome.
The pronator teres is used as a donor muscle transplants, so its innervation should be known in detail so as to restore movement of fingers after transplant.
Alertness and emotion--psycho-sensory influences act on the hypothalamus (part of the sympathetic innervation of the dilator pupillae) via the limbic system.
Results from another study showed 28 of 42 patients with hip pain of varying etiologies responded to surgical neurectomy of the obturator and quadratus femoris components, where failures were attributed to an extrapelvic surgical approach and variability in joint innervation.
The authors recommend further studies involving the innervation pattern of posterior gastric nerve.
Each muscle in that region is then detailed separately stating: anatomy, function, innervation, referred pain, needling technique and precautions.
This suggests that these neurotrophic factors might be involved in the innervation of dental structures.