lumbrical muscles


Also found in: Dictionary.
Related to lumbrical muscles: Adductor pollicis

lumbrical muscles

The four small intrinsic muscles of the hand lying between the METACARPAL BONES and acting on tendons of another muscle, the flexor digitorum profundus, to straighten the fingers and bend the joints between the fingers and the palms. Similar muscles, with similar actions, occur in the feet and assist in walking.
References in periodicals archive ?
Superficial recording electrodes were placed over APB (at 8 cm distance from the stimulus site), second lumbrical muscle (at 10 cm distance from stimulus site), and second interosseous muscle (at 10 cm distance from stimulus site).
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.
The aim of this study was to ascertain if KMI can facilitate activation of the hand lumbrical muscles in the post-stroke hemiparetic hand.
The results of this study suggest that KMI, alongside physical treatment, is an effective means to facilitate activation of the lumbrical muscles in the hemiparetic hand.
Facilitation of activation in lumbrical muscles, repeated 10 times.
Nevertheless, the presence of nonnegligible cocontractions in the antagonistic muscle groups - most notably the extensor digitorum and the role played in finger flexion by the interossei and lumbrical muscles (Follows, 1986; Ketchum, Thompson, Pocock, & Wallingford, 1978; Landsmeer & Long, 1965; Trombly & Cole, 1979) - is also interfering with force estimation.
The rapidity and delicacy of lumbrical muscle action is similar to oribicularisocculi.
An aberrant lumbrical muscle with abnormal origin or insertion may be the principal cause for compatodactyly which is a painless flexion contracture of the proximal interphalangeal joint that is a gradually progressive condition.
The articular system in the digit is connected by mechanical link and lumbrical muscle is one of the links in this system that produces dynamic controlled extension of interphangeal joints.
PATTERN OF ORIGIN OF LUMBRICAL MUSCLES(STUDY OF 40 HANDS) Normal type Lumbrical Muscle No.
has reported anomalous lumbrical muscle originating from the forearm and inserted in the region of the index finger compressing the median nerve.
In the present study, first lumbrical muscle is inserted into dorsal digital expansion in 35 specimens.