Lumbrical


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Lum´bric`al


a.1.(Anat.) Resembling a worm; as, the lumbrical muscles of the hands of the hands and feet.
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In addition, there is a technique with recording from the second lumbrical and interosseous muscles with stimulation of median and ulnar nerves, respectively.
There was weakness of the lumbrical muscles of all 4 fingers, as well as, of the abductor digiti minimi in his left hand.
In the hand, it innervates the thenar eminence and the first two lumbrical muscles.
Wide resection of the tumor was accompanied by disarticulation of the carpometacarpal (CMC) joint, osteotomy of the proximal second metacarpal bone, disarticulation of the second metacarpophalangeal (MCP) joint, resection of the tendons and neurovascular bundles of the thumb and index finger, and resection of both the first dorsal interosseous and lumbrical muscles.
A mass or lump detected within the transverse carpal ligament should be examined with gliding of the fingers, as it may represent a proximal origin of the index lumbrical, or an anomalous muscle belly of the FDI to the indicis.
The lateral collateral slips are thickened by the tendons of lumbrical and interosseous muscles and the medial collateral slips by tendons of the interosseous alone.
INTRODUCTION: The lumbrical muscle is so named because it resembles the shape, size and color of an earthworm.
Neurophysiological grades were defined as (a) mild CTS: prolonged distal sensory peak latency with +- decreased sensory amplitude, (b) moderate CTS: abnormal median sensory peak latencies with prolongation of the distal motor latency, (c) severe CTS: prolonged motor and sensory distal peak latency either with a low or absent sensory nerve action potential (SNAP) or compound muscle action potential (CMAP), (d) very severe CTS: absent thenar motor or sensory response either with a present or absent lumbrical response.
Once past the metacarpophalangeal joint, the extensor tendon is divided into three bands, the central portion which receives some of the fibers from lumbrical muscles, that goes to insert on the proximal interphalangeal joint capsule at the base of the second phalanx.
The co-ordination of extension of the PIP with simultaneous flexion of the MCP is known to be underpinned by the action of the hand lumbrical muscles (4).
El 1er y 2 musculo lumbrical se origina de la cara anterior y borde lateral del tendon del flexor digital profundo del II y III dedo.
Homma & Sakai mostraron que el RPNU envia sus ramos de manera regular, siendo cuatro para cada espacio interoseo, un ramo lumbrical, un ramo articular superficial, un ramo interoseo ulnar y un interoseo radial.