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What do the iliocostalis longissimus and spinalis muscles together form the?
Wiki User
∙ 11y ago
erectus spinae
Wiki User
∙ 11y ago
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What is the group of muscles that keep the back straight and the body erect?
The main group of muscles supporting the back are the erector spinae, comprised of the spinalis, longissimus,and iliocostalis.
Name there major muscles in the back?
Three major muscles in the back are the trapezius, latissimus dorsi, and the spinal erectae.
What are the four muscles that extend the vertebral column?
Longissimus Spinalis Semispinalis Iliocostalis, a minor role in extension but a major role in lateral bending and twisting of the spine Multifidius, a stabilizer muscle, plays a minor role in back extension
What is the result of bilateral contraction of the erector spinae group?
Bilateral contraction of the erector spinae muscles which are the iiliocostalis, longissimus and spinalis leads to extension/hyper extension of the back.
What muscles are used for neck extension?
supraspinatus, infraspinatus, subscapularis, teres minor
What muscle is located on the sides of the vertebral column?
Erector spinae are the muscles that move the vertebral column.It is the largest muscle mass of the back, forming a prominent bulge on either side of the vertebral column.It is the chief extensor of the vertebral column. It is also important in controlling flexion, lateral flexion and rotation of the vertebral column and in maintaining the lumbar curve, because the main mass of the muslce is in the lumbar region.Consists of: iliocostalis, longissimus and spinalis.Erector spinae are the muscles that move the vertebral column.
What is erector spinae activity?
The erector spinae is actually a group of three long postural muscles; iliocostalis, longissimus and spinalis. Their actions are pretty much the same. Iliocostalis is the most lateral of the group. Its origin is the thoracolumbar aponeurosis and ribs one through twelve. It inserts on the transverse processes of lumbar vertebrae one through three, all twelve ribs and the transverse processes of the lower cervical vertebrae. In other words, it begins on the lower vertebral column, arcs outward across the ribs where it has both origins and insertions, and arcs back inward at the lower neck. The long tendons of iliocostalis extend laterally beneath the scapula. It allows unilateral lateral flexion and bilateral extension of the spine. Longissimus, the middle muscle and (as its name suggests) longest of the group, originates on the thoracolumbar aponeurosis and the transverse processes of the thoracic vertebrae one through five. It inserts on ribs four through twelve and the transverse processes of the cervical vertebrae ending at the mastoid process. Longissimus is thick and along with iliocostalis it makes a visible mound along the spine. As mentioned earlier, this muscle's cross sectional area, its thickness, tells you that it is very powerful. Its actions are the same as iliocostalis, but unlike the rest of the group, it has action on the neck as well. Spinalis is the smallest and most medial of the group, lying within the lamina groove. Unlike the rest of the group whose origin is inferior to its insertion, it originates superiorly; at the ligamentum nuchae, the spinous process of cervical vertebra 7, and the spinous processes of the lower thoracic and upper lumbar vertebrae. It inserts at the spinous processes of cervical vertebrae two through seven and the spinous processes of the upper thoracic vertebrae.
What action does the multifidus have in common with the erector spinae?
The Erector Spinae muscle actually consists of three columns of muscles, the Iliocostalis, Longissimus, and Spinalis, each running parallel on either outer side of the Vertebra and extending from the lower back of the skull all the way down to the Pelvis. The multifidus muscle is a series of small, triangular muscle bundles located on either side of the spinal column that make up the 2nd layer of the deep back muscles. Composed of 3 layers total, the deep back muscles are collectively called the intrinsic layer. Yet another name for this group is the transversospinal layer. Above the transversospinal (deep) layer of back muscles is the superficial layer.The superficial layer is also known as the extrinsic muscles or the "erector spinae," or simply the paraspinal muscles. The multifidus stabilizes the spine and helps the erector to move it.
What are the core muscles?
Core muscles include those of the pelvic floor, internal and external oblique's, rectus abdominus, sacrospinalis, and the longissimus thoraces. Minor core muscles include the latissimus dorsi and the trapezius.
What muscle maintains upright position?
For upright posture, many to name, but mainly focusing on extension from ankles to head: quadriceps (knee ext), gluteus maximus and hamstings (hip ext), gastrocnemius/soleus (preventing anterior translation of tibia and knee buckling), lumbar through capital extensors (iliocostalis, longissimus, spinalis, semispinalis, multifidus, quadratus lumborum, interspinales, rectus capitis posterior major & minor, obliquus capitis superior- to maintain spinal extension); as well as scapular stabilizers to prevent winging and hold shoulders back (rhomboids, trapezius, serratus anterior). I'm sure I left a few out, but you have the majority here
what are the names of the core muscles of the abdominal area, back hips and pelvis?
Major muscles included are the pelvic floor muscles, transversus abdominis, multifidus, internal and external obliques, rectus abdominis, erector spinae (sacrospinalis) especially the longissimus thoracis, and the diaphragm.
What muscle does the lateral flexion of the torso involve?
Primarily quadratus lumborum, unilateral contraction of spinalis muscles (you can feel these contract in your lower-mid back on the side to which you're bending against resistance) and, to a lesser extent, oblique muscles.
