nerve

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Related to Alveolar nerve: dental nerve, incisive nerve, incisive nerve block

nerve:

see nervous systemnervous system,
network of specialized tissue that controls actions and reactions of the body and its adjustment to the environment. Virtually all members of the animal kingdom have at least a rudimentary nervous system.
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.

Nerve

 

the cordlike association of nerve tissues that links the brain and nerve ganglia by innervation to the other organs and tissues of the body.

A nerve primarily consists of nerve fibers. In vertebrates many nerves converge to form a bundle that is surrounded by a connective tissue sheath, the perineurium; the thin interstitial layers of connective tissue that separate the individual fibers deep within the bundle constitute the endoneurium. Finally, the entire nerve trunk, comprising several bundles, is covered by an additional sheath, the epineurium.

Nerves can be sensory (also called afferent or centripetal) or motor (also called efferent or centrifugal). Some nerves, for example, those innervating the skeletal muscles, mainly include myelinated, or medullated, fibers; others, for example, the sympathetic nerves, largely consist of unmyelinated, or unmedullated, fibers.

In reptiles, birds, mammals, and man 12 pairs of cranial nerves branch from the brain: the olfactory (cranial nerve I), the optic (cranial nerve II), the oculomotor (cranial nerve III), the trochlear (cranial nerve IV), the trigeminal (cranial nerve V), the abducent (cranial nerve VI), the facial (cranial nerve VII), the acoustic (cranial nerve VIII), the glossopharyngeal (cranial nerve IX), the vagus (cranial nerve X), the accessory (cranial nerve XI), and the hypoglossal (cranial nerve XII). Only the first ten pairs are present in fish and amphibians.

In man there are 31 pairs of spinal nerves: eight cervical, 12 thoracic, five lumbar, five sacral, and one coccygeal. Each pair innervates the effectors and receptors of a certain part of the body. The spinal nerves branch from the spinal cord into two roots—the posterior, or sensory, and the anterior, or motor. Both roots then combine to form a common trunk that consists of both sensory and motor fibers.

Several adjacent nerves can be combined into nerve plexuses, where an exchange of fibers between different nerves can take place. Three large plexuses are distinguished: the cervical, the brachial, and the lumbosacral. Each nerve plexus is the origin of several pairs of nerves; for example, the sacral portion of the lumbosacral plexus gives rise to the sciatic nerves.

Nerves that originate in the ganglia, trunks, and plexuses of the autonomic nervous system constitute a specific group. The optic nerve is remarkable for its large number of fibers; there are more than 1 million in the human optic nerve. Usually, however, there are 103 -104 fibers in a nerve. In invertebrates certain nerves are known to consist of only a few fibers. The peripheral nervous system in animals and man consists of aggregations of nerves.

D. A. SAKHAROV

nerve

[nərv]
(neuroscience)
A bundle of nerve fibers or processes held together by connective tissue.

nervure

Any one of the ribs of a groined vault, but esp. a rib which forms one of the sides of a compartment of the groining.

nerve

1. any of the cordlike bundles of fibres that conduct sensory or motor impulses between the brain or spinal cord and another part of the body
2. a large vein in a leaf
3. any of the veins of an insect's wing
References in periodicals archive ?
4% Articaine buccal infiltration versus 2% lidocaine inferior alveolar nerve block for emergency root canal treatment in mandibular molars with irreversible pulpitis: a randomized clinical study.
Efficacy of preoperative ibuprofen and meloxicam on the success rate of inferior alveolar nerve block for teeth with irreversible pulpitis.
Using virtual surgical planning, the inferior alveolar nerve (IAN) can be traced through its entire intramandibular course.
duration (month) 1 Female 50 2 Female 57 3 Male 51 4 Female 49 5 Male 60 6 Male 54 7 Male 56 8 Female 52 9 Male 58 10 Male 46 11 Female 52 12 Male 50 13 Female 44 14 Female 54 15 Male 53 KCOT: keratocystic odontogenic tumor; IAN: inferior alveolar nerve.
Infratemporal space infection can be observed after maxillary molar infections, a posterior superior alveolar nerve or inferior alveolar nerve blocks as well as mandibular third molar infections that spread to pterygomandibular space (15).
Subjects were randomly allocated into two groups One group received 4% articaine buccal infiltration and the other group received inferior alveolar nerve block of 4% articaine.
Coronectomy or partial odontectomy reduces the likelihood of nerve injury by insuring retention of the vital roots when they are close or associated with the inferior alveolar nerve as evaluated by plain radiography or CBCT.
All patients (18-45 years old) that required inferior alveolar nerve block for wisdom tooth removal were included in the study.
The inferior alveolar nerve (IAN) is the branch of the mandibular division of the trigeminal nerve that provides innervation to the mandible.
Because of the proximity of the inferior alveolar nerve to the mandibular canal, there are procedures that offer great risk of nerve injury, such as lower third molar extractions, placement of dental implants, orthognathic surgery, and fixation of mandibular fractures.