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 ?
Diagnosis is made by excluding anatomic basis for the patient's symptoms.8 We encountered 4.7% of our patients in whom no cause for the earache could be found either in the ear or distant head neck sites having common sensory innervation with the ear.
To address the issue, we investigated the innervation of different components of eccrine sweat glands by double IF staining for nerve fiber markers and eccrine sweat gland markers.
In conclusion, knowledge of the anatomical innervation to the shoulder joint is critical in tailoring postoperative pain management and analgesic outcome expectations after shoulder surgery.
Fasching et al., "Myocardial m-[[sup.123]I] iodobenzylguanidine scintigraphy for the assessment of adrenergic cardiac innervation in patients with IDDM.
Mense, "Innervation changes induced by inflammation of the rat thoracolumbar fascia," Neuroscience, vol.
Guinan Jr., "Efferent innervation of the organ of corti: two separate systems," Brain Research, vol.
However, this is not reliable due to the variable innervation of this muscle.
The median nerve does not have cutaneous or motor branches in the arm, but in the forearm it provides motor innervation to the anterior compartment, except for the flexor carpi ulnaris and half of the flexor digitorum profundus.
Dissection will only cut the blood supply and its innervation without harming the cavernous nerves and creating a non-functioning organ.
[1-6] While these grafts lack innervation, hair follicles and sweat glands, they are the most complete bioengineered skin grafts currently available to treat full-thickness skin defects resulting from acute and elective procedures.
Anatomical description of the facet joint innervation and its implication in the treatment of recurrent back pain.