What 3 group of muscles make up the erector spinae?

These three muscles include: Longissimus capitis Longissimus cervicis Longissimus thoracis[1] The erector spinae muscles, including longissimus, are the most powerful extensors of the vertebral column.

What does the erector spinae group do?

The erector spinae muscles lie on each side of the vertebral column and extend alongside the lumbar, thoracic, and cervical sections of the spine. The erector spinae muscles function to straighten the back and provide for side-to-side rotation. An injury or strain to these muscles may cause back spasms and pain.

What movement is created by the erector spinae?

The function of the spinal erectors is to move the vertebral column. Bilateral contraction of these muscles extends the spine, while unilateral contraction causes lateral flexion (ipsilateral). They also help to maintain posture by steadying the spine on the pelvis during walking.

Is splenius capitis part of erector spinae?

The two muscles in the superficial layer include the splenius cervicis and splenius capitis. They help with movements of the shoulder and neck. The intermediate muscles are the erector spinae. They include the longissimus, iliocostalis, and spinalis muscles.

Which of the erector spinae muscles attach on the skull?

Medial to the cervical insertions, other bundles extend superiorly to the mastoid process deep to the splenius capitis and sternocleidomastoid muscles. Thus, the longissimus is the only erector spinae muscle to reach the skull.

What are the 2 actions of the erector spinae group?

The erector spinae (/ɪˈrɛktər ˈspaɪni/ irr-EK-tər SPY-nee) or spinal erectors is a set of muscles that straighten and rotate the back.

How do you work out your erector spinae?

The superman trains the erector spinae as an extensor by having you lift your legs and arms off of the ground by flexing your lower back and then holding this position. Your lower back will have to work to initiate the movement and stabilize to hold the top position isometrically.

What muscle is deep to splenius capitis?

sternocleidomastoideus
The splenius capitis is deep to sternocleidomastoideus at the mastoid process, and to the trapezius for its lower portion. It is one of the muscles that forms the floor of the posterior triangle of the neck.

What are the attachments of the erector spinae group?

Attachments. Several texts state that the erector spinae muscles have a single, common insertion point of a large broad tendon on the back of the sacrum, the inner side of the iliac crest, sacroiliac ligaments, and lumbosacral spinous processes 2-5.