lumbar plexus


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Related to lumbar plexus: sciatic nerve, lumbar plexus block

plexus

 [plek´sus] (pl. plex´us, plexuses) (L.)
a network or tangle, chiefly of veins or nerves; see also rete. adj., adj plex´al.
plexus basila´ris a venous plexus of the dura mater located over the basilar part of the occipital bone and the posterior part of the body of the sphenoid bone, extending from the cavernous sinus to the foramen magnum.
brachial plexus see brachial plexus.
cardiac plexus the plexus around the base of the heart, chiefly in the epicardium, formed by cardiac branches from the vagus nerves and the sympathetic trunks and ganglia, and made up of sympathetic, parasympathetic, and visceral afferent fibers that innervate the heart.
carotid p's nerve plexuses surrounding the common, external, and internal carotid arteries.
celiac plexus solar plexus.
cervical plexus a nerve plexus formed by the ventral branches of the first four cervical spinal nerves and supplying the structures in the region of the neck. One important branch is the phrenic nerve, which supplies the diaphragm.
choroid plexus infoldings of blood vessels of the pia mater covered by a thin coat of ependymal cells that form tufted projections into the third, fourth, and lateral ventricles of the brain; they secrete the cerebrospinal fluid.
coccygeal plexus a nerve plexus formed by the ventral branches of the coccygeal and fifth sacral nerve and by a communication from the fourth sacral nerve, giving off the anococcygeal nerves.
cystic plexus a nerve plexus near the gallbladder.
dental plexus either of two plexuses (inferior and superior) of nerve fibers, one from the inferior alveolar nerve, situated around the roots of the lower teeth, and the other from the superior alveolar nerve, situated around the roots of the upper teeth.
lumbar plexus one formed by the ventral branches of the second to fifth lumbar nerves in the psoas major muscle (the branches of the first lumbar nerve often are included).
lumbosacral plexus the lumbar and sacral plexuses considered together, because of their continuous nature.
lymphatic plexus an interconnecting network of lymph vessels that provides drainage of lymph in a one-way flow. An example is the lymphocapillary vessels, collecting vessels, and trunks.
myenteric plexus a nerve plexus situated in the muscular layers of the intestines.
nerve plexus a plexus composed of intermingled nerve fibers.
pampiniform plexus
1. in the male, a plexus of veins from the testis and the epididymis, constituting part of the spermatic cord.
2. in the female, a plexus of ovarian veins draining the ovary.
sacral plexus a plexus arising from the ventral branches of the last two lumbar and first four sacral spinal nerves.
solar plexus see solar plexus.
tympanic plexus a network of nerve fibers supplying the mucous lining of the tympanum, mastoid air cells, and pharyngotympanic tube.

lumbar plexus

a network of nerves formed by the ventral anterior primary divisions of the first three and the greater part of the fourth lumbar nerves. It is located on the inside of the posterior abdominal wall, either dorsal to the psoas major or among its fibers and ventral to the transverse processes of the lumbar vertebrae. The branches of the lumbar plexus are the iliohypogastric, ilioinguinal, genitofemoral, lateral femoral cutaneous, obturator, accessory obturator, and femoral nerves. The iliohypogastric, ilioinguinal, and genitofemoral nerves supply the caudal part of the abdominal wall. The lateral femoral cutaneous, obturator, accessory obturator, and femoral nerves supply the anterior thigh and the middle of the leg. Only 20% of people have the accessory obturator nerve, which comes from the third and the fourth lumbar nerves. Compare sacral plexus. See also lumbosacral plexus.

lum·bar plex·us

(lŭm'bahr plek'sŭs)
1. A nervous plexus, formed by the ventral rami of the first four lumbar nerves; it lies in the substance of the psoas muscle.
2. A lymphatic plexus formed of about twenty lymph nodes and connecting vessels situated along the lower portion of the aorta and the common iliac vessels.

lumbar

pertaining to the loins.

lumbar epidural analgesia
see epidural anesthesia.
lumbar paralysis
paraplegia generally and specifically that due to cerebrospinal nematodiasis.
lumbar plexus
one formed by the ventral branches of the last four or five lumbar nerves in the psoas major muscle.
lumbar puncture
insertion of a needle and stylet into the subarachnoid space between the seventh lumbar vertebra and sacrum in most species except the dog, where the space between the sixth and seventh lumbar vertebrae is usually used; called also spinal puncture. A lumbar puncture may be done to measure the pressure of cerebrospinal fluid and obtain a specimen for examination, and to inject a contrast medium for special radiographic examinations such as myelography. As a therapeutic measure it is sometimes done to relieve intracranial pressure or to remove blood or pus from the subarachnoid space. A lumbar puncture also is necessary for injection of a spinal anesthetic.
lumbar spinal stenosis
see lumbosacral stenosis.
lumbar tap
see lumbar puncture (above).
lumbar vertebrae
the vertebrae between the thoracic vertebrae and the sacrum, numbering seven in dogs and cats, six in horses and cattle, and six or seven in sheep and pigs.

plexus

pl. plexus, plexuses [L.] a network or tangle, chiefly of veins or nerves.

brachial plexus
see brachial plexus.
cardiac plexus
the plexus around the base of the heart, chiefly in the epicardium, formed by cardiac branches from the vagus nerves and the sympathetic trunks and ganglia, and made up of sympathetic, parasympathetic and visceral afferent fibers that innervate the heart.
carotid p's
nerve plexuses surrounding the common, external and internal carotid arteries.
celiac plexus
a plexus of autonomic fibers and sympathetic nerve ganglia which surround the origin of the celiac artery, and supply the abdominal viscera.
celiacomesenteric plexus
a plexus of autonomic nerve fibers and sympathetic ganglia around the origin of the celiac and cranial mesenteric arteries; called also solar plexus.
cervical plexus
a network of nerve fibers formed by the first four cervical nerves and supplying the structures in the region of the neck.
choroid plexus
infoldings of blood vessels of the pia mater covered by a thin coat of ependymal cells that form tufted projections into the third, fourth, and lateral ventricles of the brain; they secrete the cerebrospinal fluid.
coccygeal plexus
a nerve plexus formed by the ventral branches of the coccygeal and last sacral nerves.
coronary plexus
a venous plexus within the coronet of the hoof.
cutaneous p's
superficial, middle and deep, inter-communicating plexuses of blood vessels are identified as supplying blood to haired skin.
cystic plexus
a nerve plexus near the gallbladder.
dental plexus
either of two plexuses (inferior and superior) of nerve fibers, one from the inferior alveolar nerve, situated around the roots of the lower teeth, and the other from the superior alveolar nerve, situated around the roots of the upper teeth.
gonadal plexus
the collection of parasympathetic and sympathetic nerves to the gonads.
hoof plexus
plexus of veins draining the hoof region in the horse.
lumbar plexus
see lumbar plexus.
lumbosacral plexus
see lumbosacral plexus.
mesenteric plexus
parasympathetic and sympathetic nerve supply to the abdominal organs.
myenteric plexus
nerve plexus
a plexus composed of intermingled nerve fibers.
pampiniform plexus
1. a plexus of veins from the testis and the epididymis, constituting part of the spermatic cord.
2. a plexus of ovarian veins in the broad ligament of the uterus.
parametrial plexus
the venous plexus within the broad ligament providing venous drainage to the uterus and vagina.
plexus papilloma
see plexus papilloma.
pulmonary plexus
the array of autonomic nerves which supply the lungs.
renal plexus
autonomic nerve supply to the kidney.
sacral plexus
a plexus arising from the ventral branches of the last few lumbar and first few sacral spinal nerves.
solar plexus
see celiacomesenteric plexus (above).
tympanic plexus
a network of nerve fibers supplying the mucous lining of the tympanum and auditory tube.
References in periodicals archive ?
Patient satisfaction and effectiveness of lumbar plexus and sciatic nerve block for total knee arthroplasty.
The inguinal paravascular technic of lumbar plexus anesthesia: the "3-in-1 block.
Effects of epidural analgesia and continuous lumbar plexus block on functional rehabilitation after total hip arthroplasty].
Continuous lumbar plexus block for postoperative pain control after total hip arthroplasty.
Thus, the transducer can be moved and tilted more laterally from the lumbar plexus, so that needle insertion can be made at a less steep angle to the ultrasound beam which may permit observation of the needle more easily.
The nerves of the lower extremity are not bundled in a single fascial sheath and therefore separate injections are needed to adequately anaesthetise all regions innervated by the lumbar plexus and the sciatic nerve.
Anterior approaches to the lumbar plexus (for example, the fascia iliaca compartment block as described by Dalens et al (3), where the injection point is remote from neurovascular structures) may be a safer alternative and may be as suitable (or even more suitable) for a continuous technique.
edu/rasci/) states that a lumbar plexus block through the psoas fascia is contraindicated.
Auroy et all recorded only one case of cardiac arrest during a posterior lumbar plexus block, probably related to cephalad diffusion of the local anaesthetic in the epidural space.
Singelyn et al reported a case of epidural extension after a three-in-one lumbar plexus blockade (2).
Continuous blockade of the lumbar plexus after knee surgery: a comparison of the plasma concentration and analgesic effect of bupivacaine 0.