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2. Rhomboid muscles - Wikipedia

   en.wikipedia.org/wiki/Rhomboid_muscles

   The rhomboid muscles ( / ˈrɒmbɔɪd / ), often simply called the rhomboids, are rhombus -shaped muscles associated with the scapula. There are two rhomboid muscles on each side of the upper back: [ 1][ 2][ 3] Rhomboid major muscle. Rhomboid minor muscle. The large rhombus-shaped muscle, located under the trapezius muscle in the upper part of ...

3. Quadratus lumborum muscle - Wikipedia

   en.wikipedia.org/wiki/Quadratus_lumborum_muscle

   The left quadratus lumborum, one of the posterior abdominal muscles, is depicted in red. The quadratus lumborum muscle, informally called the QL, is a paired muscle of the left and right posterior abdominal wall. It is the deepest abdominal muscle, and commonly referred to as a back muscle. Each is irregular and quadrilateral in shape.

4. Trapezius - Wikipedia

   en.wikipedia.org/wiki/Trapezius

   Trapezius. The trapezius muscle ( pl.: trapezii) is a surface muscle of back, shown in red above and below. Details. Origin. Medial one-third of superior nuchal line, external occipital protuberance, spinous processes of vertebrae C7-T12, Nuchal ligament [ 1] Insertion. Posterior border of the lateral one-third of the clavicle, acromion process ...

5. Piriformis syndrome - Wikipedia

   en.wikipedia.org/wiki/Piriformis_syndrome

   Piriformis syndrome is a condition which is believed to result from nerve compression at the sciatic nerve by the piriformis muscle. [ 2][ 5] It is a specific case of deep gluteal syndrome. [ 6] The largest and most bulky nerve in the human body is the sciatic nerve. Starting at its origin it is 2 cm wide and 0.5 cm thick.

6. Rhomboid major muscle - Wikipedia

   en.wikipedia.org/wiki/Rhomboid_major_muscle

   Rhomboid major muscle. Muscles connecting the upper extremity to the vertebral column. Rhomboid major indicated in red. Retracts the scapula and rotates it to depress the glenoid cavity. It also fixes the scapula to the thoracic wall. The rhomboid major is a skeletal muscle of the back that connects the scapula with the vertebrae of the spinal ...

7. Low back pain - Wikipedia

   en.wikipedia.org/wiki/Low_back_pain

   Frequency. ~25% in any given month [ 7][ 8] Low back pain or lumbago is a common disorder involving the muscles, nerves, and bones of the back, in between the lower edge of the ribs and the lower fold of the buttocks. Pain can vary from a dull constant ache to a sudden sharp feeling. [ 4]