lumbricals


Also found in: Dictionary.
Related to lumbricals: Flexor digitorum profundus

lumbricals

small intrinsic plantar muscles of the foot
  • origin from adjacent slips of flexor digitorum longus (FDL) tendon (three bipennate muscles), and from medial aspect of FDL tendon leading to second toe (one unipennate muscle)

  • insertion lumbrical tendon enters each lesser toe to medial aspect, to insert into base of proximal phalanx and extensor expansion

  • nerve supply first lumbrical: medial plantar nerve; second, third and fourth lumbricals: lateral plantar nerve

  • action weak flexion of lesser metatarsophalangeal joints; extension of lesser toe interphalangeal joints, i.e. balancing tension within extensor digitorum longus and flexor digitorum longus tendons; lumbrical dysfunction is associated with lesser-toe sagittal-plane deformities

References in periodicals archive ?
In the hand, it innervates the thenar eminence and the first two lumbrical muscles.
The tiny lumbricals provide muscular bridges and harmonise the functions between lateral band interphangeal extensor mechanism and flexor digitorum profundus, a unique occurrence which may have importance in adjusting the position of finger joints when using the hands.
The present study was undertaken to observe and record the attachments and innervation of lumbricals in south Indian in properly fixed cadaveric hands.
In this study the effectiveness of motor imagery training in facilitating activation of the hand lumbrical muscles in post-stroke hemiparesis was explored.
To the best of our knowledge, the role of KMI in promoting focused activation of the lumbrical muscles in the hemiparetic hand has not yet been investigated.
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.
tercer lumbrical puede ser inervado, a veces, por el n.
A neurological examination demonstrated motor strength changes: 4/5 deltoid and supra and infraspinatus, 3/5 triceps, 1/5 biceps, 2/5 wrist flexion, 0/5 wrist and finger extension, 1/5 lumbricals and interossei, 0/5 abductor pollicis brevis and 3/5 adductor pollicis on the right.
Overuse syndrome can affect keyboard players at the wrist and finger extensors, the lumbricals (especially the fourth and fifth digits) of both hands, and the interossei of the right hand.
The unassisted angle, which indicates inadequate functioning of lumbricals and interossei supplied by the ulnar nerve, was drastically reduced after post operative physiotherapy.
The ulnar nerve has a sensory distribution that includes the area medial to the ulnar half of the ring finger and a motor distribution that includes the intrinsic muscles of the hand (with the exception of the thenars and the first and second lumbricals, which are supplied by the median nerve).
20) The lumbricals have minimal flexor moment on the MCP joints and their function is mainly in unresisted opening and closing movements of the fingers depending on MCP positions or movements.