Multifidus thoracis - originates from the transverse processes of the thoracic vertebrae. Multifidus lumborum - originates from the mammillary processes of the lumbar vertebrae, posterior aspect of the sacrum, posterior superior iliac spine (PSIS) of ilium and the posterior sacroiliac ligament. The fi...
*Vertebral Column*: The vertebral column is made up of 26 bones. The first 24 are all vertebrae, followed by the sacrum and coccyx (tailbone). *Thoracic Cage*: The thoracic cage is made up of the sternum (breastbone) and 12 pairs of ribs. These bones form a protective cage around th...
The spinal cord and spinal nerves are responsible for sending and receiving signals to and from the brain and body. They travel through and out of the spine, which is made up of 33 vertebrae that are divided into five regions: cervical (neck), thoracic (chest/trunk), lumbar (low back),...
Ribs are flat, narrow and curved bones of strips found in the chest of vertebrates. They are attached to the vertebrae on the dorsal side and to the sternum on the ventral side. This attachment forms an enclosed structure called the rib cage. Read on to
must have a flexible and elastic protective covering. Such a covering is provided by the bony thoracic basket, orrib cage, which forms the skeleton of the wall of the chest, orthorax. The connection of the ribs to the breastbone—thesternum—is in all cases a secondary one, brought about...
one long side and convex on the opposite. They are normally located high in theabdominal cavityand against its back wall, lying on either side of thevertebral columnbetween the levels of the 12th thoracic and third lumbar vertebrae, and outside the peritoneum, the membrane that lines the ...
Sacrum, wedge-shaped triangular bone at the base of the vertebral column, above the caudal (tail) vertebrae, or coccyx, that articulates (connects) with the pelvic girdle. In humans it is usually composed of five vertebrae, which fuse in early adulthood.