What is the origin insertion and action of the erector spinae?
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Asked by: Matthew Distler
Erector spinae muscles
| Erector spinae | |
|---|---|
| Origin | Spinous processes of T9-T12 thoracic vertebrae, medial slope of the dorsal segment of iliac crest |
| Insertion | spinous processes of T1 and T2 thoracic vertebrae and the cervical vertebrae |
| Artery | lateral sacral artery |
| Nerve | posterior branch of spinal nerve |
What is the action of the erector spinae?
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 is the action of the erector spinae muscle quizlet?
Together – straighten the back, returning it to the upright position from a flexed position, and pull the head posteriorly. They also participate in controlling vertebral column flexion by contracting and relaxing in a coordinated fashion; Individually – bend the vertebral column laterally.
What is the primary movement of the erector spinae?
Muscle actions
All of the erector spinae muscles work bilaterally to extend the spine. Longissimus thoracis and longissimus cervicis also function unilaterally to laterally flex the spine to the same side.
What action occurs if the erector spinae muscles contract concentrically?
Postures such as shalabhasana cause all of the erector spinae muscles to contract. They help lift the spine into hyperextension. In urdhva dhanurasana, the erector spinae muscles concentrically contract against the resistance of both gravity and the front of the body.
What two erector spinae muscles share the same origin?
Iliocostalis Muscles. The iliocostalis (iliocostocervicalis) group of muscles is subdivided into lumborum, thoracis, and cervicis muscles (see Fig. 4-3, A and B). Inferiorly the iliocostalis muscles derive from the common origin of the erector spinae muscles.
What is the origin of the spinalis?
The spinalis is the body’s most medial, or closest to the midline of the body, deep back muscle and originates at the spinous processes (bony projections at the back of each vertebra) of the lower spinal vertebrae.
What is the insertion of the triceps Brachii quizlet?
Triceps brachii – Insertion. Olecranon process of the ulna. Triceps brachii – Action. All heads- extension of the elbow, Long head- extension, adduction, and horizontal abduction of the shoulder joint. Triceps brachii – Innervation.
What is the insertion of the pectoralis major quizlet?
Origin: Juncition of rib 1 and its costal cartilage, insert inferior surface of middle third of clavicle, innervation: Nerve to subclavius (C5-C6), FX: Anchors and depresses clavicle.
What is the origin insertion and action of the Iliocostalis Cervicis?
Origin and insertion
Iliocostalis cervicis arises from the angles of ribs 3-6 and inserts to the transverse processes of vertebrae C4-C6. Iliocostalis thoracis originates from the angles of ribs 7-12 and inserts to the angles of the upper six ribs and transverse process of vertebra C7.
What are the attachments of the erector spinae group?
Attachments
- spinalis capitis muscle. not a truly separate muscle – when it exists it consists of occasional fibers from the semispinalis capitis, but with a different insertion. …
- spinalis cervicis muscle. variably present. …
- spinalis thoracis muscle.
What is the insertion of the iliocostalis?
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What is the function of erector muscle of hair?
Arrector Pili Muscle – This is a tiny muscle that attaches to the base of a hair follicle at one end and to dermal tissue on the other end. In order to generate heat when the body is cold, the arrector pili muscles contract all at once, causing the hair to “stand up straight” on the skin.
What 3 muscles make up the erector spinae?
Longissimus Thoracis – Physiopedia Description longissimus thoracis The longissimus muscle is a long intrinsic muscle of the back. Along with spinalis and iliocostalis, these three muscles comprise the erector spinae group.
How do you remember the erector spinae muscles?
There are multiple handy mnemonics to recall the erector spinae muscles. They usually describe the position from lateral to medial.
Synonyms:
- I Like Siri (mnemonic)
- I Long for Spinach (mnemonic)
- I Love Sex (mnemonic)
- I Like Standing (mnemonic)
What is the origin of the erector spinae?
Erector spinae muscles
| Erector spinae | |
|---|---|
| Origin | Spinous processes of T9-T12 thoracic vertebrae, medial slope of the dorsal segment of iliac crest |
| Insertion | spinous processes of T1 and T2 thoracic vertebrae and the cervical vertebrae |
| Artery | lateral sacral artery |
| Nerve | posterior branch of spinal nerve |
What are the attachments of the erector spinae group?
Attachments
- spinalis capitis muscle. not a truly separate muscle – when it exists it consists of occasional fibers from the semispinalis capitis, but with a different insertion. …
- spinalis cervicis muscle. variably present. …
- spinalis thoracis muscle.
Is the erector spinae part of the core?
While the abdominals are a significant part of the core strength, there are other muscles that are important as well. These include: Back extensor muscles- anatomically known as erector spinae or spinal erectors, these muscles start at the base of the skull and run all the way down to the tailbone.
Where does the soleus originate and insert?
The soleus muscle, located deep/anterior to the medial and lateral gastrocnemius muscle heads, originates on the posterior aspect of the tibia (middle third of the medial border) and fibula (head and body) and inserts on the calcaneus through the Achilles tendon (see Figure 31.1).
What Innervates the erector spinae?
The erector spinae muscles are innervated by the dorsal rami of the first cervical nerve (C1) through the fifth lumbar nerve (L5).
Where do core muscles attach?
Your core muscles are the muscles deep within the abdominals and back, attaching to the spine or pelvis. Some of these muscles include the transversus abdominis, the muscles of the pelvic floor, and the oblique muscles. Another muscle that is involved in moving the trunk is the multifidus.
What are the 2 major functions of the multifidus and erector spinae muscles?
Erector spinae and multifidus
The erector spinae muscles produce the extensor force needed for lifting, whereas the segmental extensors, primarily the multifidus muscle, provide stabilization of individual lumbar motion segments.
What is the insertion of the rectus abdominis?
Rectus abdominis muscle
| Origin | Pubic symphysis, pubic crest |
|---|---|
| Insertion | Xiphoid process, costal cartilages of ribs 5-7 |
| Innervation | Intercostal nerves (T7-T11), subcostal nerve (T12) |
| Blood supply | Inferior epigastric and superior epigastric arteries; contributions from posterior intercostal, subcostal and deep circumflex arteries |
Which muscles are found in your belly and sometimes called abs?
The rectus abdominis muscle, (Latin: straight abdominal) also known as the “abdominal muscle” or simply the “abs”, is a paired straight muscle. There are two parallel muscles, separated by a midline band of connective tissue called the linea alba.
How do a muscles origin and insertion differ?
The origin is the attachment site that doesn’t move during contraction, while the insertion is the attachment site that does move when the muscle contracts. The insertion is usually distal, or further away, while the origin is proximal, or closer to the body, relative to the insertion.
What kind of muscle is the heart?
cardiac muscle cells
The heart consists mostly of cardiac muscle cells (or myocardium). The outstanding characteristics of the action of the heart are its contractility, which is the basis for its pumping action, and the rhythmicity of the contraction.
