Semispinalis muscle
Encyclopedia
The semispinalis muscle is a transversospinalis
Transversospinales muscles
The transversospinal muscles are a group of muscles of the human back. Their combined action is rotation and extension of the vertebral column. They include:* semispinalis, spanning 4-6 vertebral segments** semispinalis dorsi** semispinalis cervicis...

 muscle
Muscle
Muscle is a contractile tissue of animals and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to...

 of the human body
Human body
The human body is the entire structure of a human organism, and consists of a head, neck, torso, two arms and two legs.By the time the human reaches adulthood, the body consists of close to 100 trillion cells, the basic unit of life...

. More specifically, it is one of three muscles:
  • Semispinalis dorsi
    Semispinalis dorsi
    The Semispinalis dorsi consists of thin, narrow, fleshy fasciculi, interposed between tendons of considerable length....

  • Semispinalis cervicis
    Semispinalis cervicis
    The semispinalis cervicis , thicker than the semispinalis dorsi, arises by a series of tendinous and fleshy fibers from the transverse processes of the upper five or six thoracic vertebræ, and is inserted into the cervical spinous processes, from the axis to the fifth inclusive.The fasciculus...

  • Semispinalis capitis
    Semispinalis capitis
    The Semispinalis capitis is situated at the upper and back part of the neck, deep to the Splenius, and medial to the Longissimus cervicis and capitis....

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