|lumbar plexus||medical dictionary|
<anatomy> A nervous plexus, formed by the ventral rami of the first four lumbar nerves; it lies in the substance of the psoas muscle, 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.
Synonyms: plexus lumbalis.
(05 Mar 2000)
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