Medical Definition of longissimus : the intermediate division of the sacrospinalis muscle that consists of the longissimus capitis, longissimus cervicis, and longissimus thoracis also : any of these three muscles.
What is the longissimus?
Longissimus is the longest, thickest and most central erector spinae muscle. It is divided into three parts (capitis, cervicis, thoracis) based on their superior attachments and location. The erector spinae muscles, including longissimus, are the most powerful extensors of the vertebral column.
What is the function of longissimus muscle?
The longissimus thoracis muscle also attaches onto the transverse processes of all 12 thoracic vertebrae. This muscle functions to hold the thoracic and lumbar regions erect, and laterally flexes the spine when it acts unilaterally.
What role does longissimus play in bent over row?
The functions of the longissimus include: Neck extension: bending the neck backwards. Lateral neck flexion: bending the neck to each side. Back extension: bending the back backwards.
Why is it called the longissimus muscle?
Anatomical terms of muscle The longissimus (Latin for ‘the longest one’) is the muscle lateral to the semispinalis muscles. It is the longest subdivision of the erector spinae muscles that extends forward into the transverse processes of the posterior cervical vertebrae.
Why is it called Spinalis?
Each of these three muscles can be further subdivided into additional smaller muscles based on the region of the spine they are in. Spinalis comes from the Latin word spina which means “thorn”. It refers to the bumpy projections that you can feel along the length of the spine, the spinous processes.
What is the function of the Iliocostalis muscle?
Function. Iliocostalis muscle laterally flexes the vertebral column to the same side. It bilaterally extends the vertebral column.
What muscles are worked in bent-over row?
What muscles do bent-over rows work?
Latissumus dorsi (run down the sides of your back)
Rhomboids (upper and mid-back)
Trapezius (upper back)
What does iliocostalis mean?
Medical Definition of iliocostalis : the lateral division of the sacrospinalis muscle that helps to keep the trunk erect and consists of three parts: a : iliocostalis cervicis.
What is the function of the iliocostalis muscle?
What are the 3 spinalis muscles?
The spinalis is a portion of the erector spinae, a bundle of muscles and tendons, located nearest to the spine. It is divided into three parts: Spinalis dorsi, spinalis cervicis, and spinalis capitis.
Is Semispinalis the same as spinalis?
Sitting deep to semispinalis thoracis are the rotatores and levatores costarum, while superficially it is covered by the spinalis thoracis (erector spinae group). Just like all the spinotransverse muscles, semispinalis thoracis is innervated by the medial branches of the posterior rami of adjacent spinal nerves.
What is the function of the longissimus thoracis muscle?
The longissimus thoracis muscle also attaches onto the transverse processes of all 12 thoracic vertebrae. This muscle functions to hold the thoracic and lumbar regions erect, and laterally flexes the spine when it acts unilaterally. It is innervated by lateral branches of the thoracic and lumbar posterior primary divisions.
Where is the longissimus located in the body?
Longissimus. It is located laterally to the semispinalis, and extends forward into the back side of the cervical vertebrae. The longissimus thoracis is the longest continuation of the sacrospinalis and lies intermediate to it. It begins at the sacrum and the spinous process (bony projections at the back of each vertebra) of the lumbar spine,…
Where does drainage of longissimus thoracis take place?
Longissimus thoracis is supplied by the dorsal branches of superior intercostal, posterior intercostal, lateral sacral and median sacral arteries. Venous drainage of the longissimus muscle occurs via the corresponding, similarly named veins.
Where does the longissimus attach to the temporal bone?
Longissimus capitis finally inserts at the lateral surface of the mastoid process of the temporal bone, adjacent to the attachments of the sternocleidomastoid and splenius capitis muscles. Longissimus cervicis originates from the transverse processes of the first 5 thoracic vertebrae ( T1-T5 ).