latissimus dorsi


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latissimus dorsi

(lə-tĭs′ə-məs dôr′sī)
n. pl. latissimi dorsi (-mī′)
Either of two broad, flat, triangular muscles with origin from the spinous processes of the lower thoracic and lumbar vertebrae, the sacrum, and the iliac crest, that insert into the humerus and whose action adducts, medially rotates, and extends the arm.

latissimus dorsi

[latis′iməs dôr′sī]
Etymology: L, widest, dorsum, the back
one of a pair of large triangular muscles on the thoracic and lumbar areas of the back. The base of the triangle inserts through lumbar aponeuroses to the spines of lumbar and sacral vertebrae and in the supraspinous ligaments, posterior iliac crest, and the lower four ribs. The fibers of the muscle twist as they pass the scapula and converge at the base of the intertubercular groove of the humerus. The latissimus dorsi extends, adducts, and rotates the arm medially; draws the shoulder back and down; and, with the pectoralis major, draws the body up when climbing. It is innervated by the thoracodorsal nerve. Compare levator scapulae, rhomboideus major, rhomboideus minor, trapezius.
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Latissimus dorsi

latissimus dorsi

The broadest muscle of the back. It arises from the spines of the six lower thoracic vertebrae and from the FASCIA attached to the lumbar vertebrae and back of the pelvis and sweeps up and forward to be inserted by a short, broad tendon into the back of the top of the upper arm bone (humerus). It acts to pull the body upward in climbing and assists in heavy breathing.

latissimus

[L.] widest, a broad structure.

latissimus dorsi
the broad muscle of the back that serves to retract the forelimb.
References in periodicals archive ?
Latissimus dorsi transfer for the treatment of irreparable rotator cuff tears.
The latissimus dorsi showed low positive genetic correlations with belly weight (0.
First, while we observed bone formation, the model provided no mechanical loading apart from the mechanical simulation from movement of the latissimus dorsi muscle.
We hypothesise that the electrical stimulation caused forceful and uncontrollable contraction of Latissimus dorsi and the upper portion of Trapezius in opposing directions.
9) The latissimus dorsi flap is based off the thoracodorsal artery, vein, and nerve.
Breast-sparing reconstruction with latissimus dorsi miniflaps.
EMG was recorded from the rectus abdominus at L1, the back extensors at the level of L3, the latissimus dorsi at t7 and the right obliques.
Three of the latter 5 drains were placed outside the safe triangle recommended by the British Thoracic Society (5) (a triangle marked by the anterior border of the latissimus dorsi, lateral border of the pectoralis major and a line horizontal to the nipple) (Fig.
Mastectomy is usually the mainstay of surgical treatment in stage 3 disease but the extent of surgery thought appropriate may vary from surgeon to surgeon, with some having a more conservative approach and others advocating resection of extensive disease with fascia and muscle and a latissimus dorsi flap.
Strong latissimus dorsi (large muscles of the mid to lower back) enforce shoulder blade stabilization, making partnering safer for both men and women.
MIAMI - Dodgers reliever Jonathan Broxton was taken for an MRI on his right latissimus dorsi, the side muscle just below the right armpit, before Tuesday's game at Florida.
Doctors at MCO attempted to graft the patient' latissimus dorsi muscle over the wound.