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 ?
DSN neuropathy may present on a spectrum from complete function to complete atrophy of the muscles it innervates.
crossed cranial nerve - it means that nerve nucleus innervates the contralateral superior oblique muscles
Similar observations have been made in Aplysia, where buccal motoneurons innervate multiple muscle groups of the buccal mass (Jordan et al.
Each nucleus contains around 6,000-7,000 neurons, about half of which are somatic motor neurons that directly innervate the ipsilateral LR.
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If you consider that the facial nerve innervates the stapedius muscle, which acts to decrease excessive movement of the ossicles during periods of loud noises, a paralysis of the muscle would cause the patient to experience hyperacusis.
Although there is no data in cardiac function and anal intercourse, rectal stimulation may innervate the vagus nerve.
Can it vascularize, innervate and repair the damaged muscle's function?
The tibial nerve then continues to innervate the muscles of the posterior compartments of the leg.
The newly discovered itch nerves sit inside the spine, near the spinal cord, and only innervate locations within the skin.
Because axons from the Para II neurons innervate the velar lobes, it was suggested that the ASO is also involved in regulating velar function (Kempf et al.
The upper brachial plexus roots (C5-C6) innervate proximal arm muscles controlling shoulder abduction, elbow flexion and contribute to the innervation of distal muscles controlling limb function.