AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Latissimus dorsi stretch3/16/2023 ![]() ![]() They originate at the scapula and, like the latissimus dorsi, insert at the humerus. ![]() The rotator cuff is composed of four muscles: the supraspinatus, infraspinatus, teres minor, and subscapularis (SITS). Another important muscle group is the rotator cuff. These include the pectoralis major, latissimus dorsi, trapezius, serratus anterior, and deltoid muscles. An entire group of different muscles move the shoulders and arms. Latissimus dorsi origin and insertion is described in more detail below. This means that the direction of movement is always from the insertion point to the origin. The insertion points are areas where movement is possible. The origin is a fixed point that does not move. ![]() All muscles originate at one or more sites and insert into one or more other locations. ![]() When looking at latissimus dorsi function, we need to know the origin and insertion of the muscle. Using the latissimus dorsi for breast reconstruction surgery Latissimus Dorsi Function As a human can function normally without it, this muscle is often used to close large wounds or substitute lost tissue in reconstructive surgery. The latissimus dorsi is the largest muscle of the human body but is not the strongest at less than one centimeter in thickness. The upper sides of each triangle cross the lower regions of the scapulae or shoulder blades. This triangular or wing-like form is mirrored on the other side of the body, although this muscle is a single muscle split into left and right segments. If the spine is seen as the bottom of a triangle and the attachment to the humerus as the apex of this triangle, it is quite easy to picture one side of the muscle. The location of the latissimus dorsi is at the mid back. The latissimus dorsi Latissimus Dorsi Location It also plays a role in lumbar spine extension (straightening) and sideways bending (lateral flexion). It allows us to extend, adduct, abduct (bring away from the body) and flex the shoulder joint. These data indicate that 1) twitch duration and shortening velocity are slowed in stretch hypertrophied muscle and 2) new fibers contribute to force production after 30 days of stretch overload.The latissimus dorsi muscle, named after the Latin term latus (wide) and dorsi (back), is a flat, wing-like muscle that stretches from its origins at the lower thoracic vertebrae, lower ribs, scapula and iliac crest and attaches or inserts at a groove in the bone of the upper arm (humerus). The maximal velocity of unloaded shortening decreased from 4.2 +/- 0.6 to 2.6 muscle lengths/s in stretched muscles. The maximal velocity of loaded shortening decreased from 2.6 +/- 0.4 muscle lengths/s in control muscles to 1.1 +/- 0.1 muscle lengths/s in stretched muscles. 187.7 +/- 9.7 ms) relative to control muscles. Stretch-enlarged muscles had significantly greater twitch half-relaxation time (161.9 +/- 7.4 vs. Specific tension was similar in control (11.1 +/- 0.2 mN/mm2) and experimental muscles (9.2 +/- 0.3 mN/mm2). Fiber hypertrophy accounted for only 60% of the 95% increase in maximal force in stretched muscles. In vitro contractile measures were made at 25 degrees C by direct stimulation of the ALD. This increased muscle mass corrected for the increase in non-muscle tissue by 121 +/- 3%. A tube weight corresponding to 12% of the bird's body mass was added to one wing of 12 Japanese quail for 30 days. The purpose of this study was to determine if stretch-induced hypertrophy alters function of the ALD. However, the functional significance of these changes is not known. Stretch overload has been shown to increase muscle mass by increasing fiber size and fiber number in the anterior latissimus dorsi (ALD) of adult Japanese quail. ![]()
0 Comments
Read More
Leave a Reply. |