Which is the strongest flexor of the vertebral column?
| LUMBAR MUSCLES | FUNCTION |
| Psoas Major | Flexes thigh at hip joint & vertebral co ... |
| Intertransversarii Lateralis | Lateral flexion of vertebral column |
| Quadratus Lumborum | Lateral flexion of vertebral column |
| Interspinales | Extends vertebral column |
What muscle flexes the vertebral column?
Flexes vertebral column, compresses the abdomen and laterally flexes and rotates vertebral column when only one contracts. Consequently, what muscles extend the vertebral column? The superficial erector spinae include the spinalis, longissimus and iliocostalis groups of muscles.
What are the superficial and deep erector spinae muscles?
The superficial erector spinae include the spinalis, longissimus and iliocostalis groups of muscles. These muscles extend the neck and the vertebral column, while some will even move the ribs. The deep erector spinae muscles include the quadratus lumborum and multifidus muscles.
What is the aponeurotic sheath of the vertebral column?
As it approaches the midclavicular line, its fibers form an aponeurotic sheath, which travels superficially across the rectus abdominis to the linea alba in the midline. Together with the internal oblique, contraction causes rotation and lateral flexion of the vertebral column.
What muscle flexes the head bilaterally?
When they contract bilaterally, the head flexes or extends. The major muscle that laterally flexes and rotates the head is the sternocleidomastoid. In addition, both muscles working together are the flexors of the head.
What muscle flexes the vertebral column?
Name of MuscleActionIliocostalisExtends and flexes laterally vertebral columnLongissimusExtends and flexes laterally vertebral columnSpinalisExtends vertebral columnSemispinalisExtends neck and vertebral column2 more rows
Which muscle flexes the vertebral column and compresses the abdomen?
The rectus abdominisThe rectus abdominis lies between the aponeuroses of the internal oblique and the transversus abdominis for most of its length. Contraction of the rectus abdominis compresses the abdomen and flexes the vertebral column.
What does the rectus abdominis do?
rectus abdominis – slung between the ribs and the pubic bone at the front of the pelvis. When contracting, this muscle has the characteristic bumps or bulges that are commonly called 'the six pack'. The main function of the rectus abdominis is to move the body between the ribcage and the pelvis.
What is the linea alba?
Linea alba (Latin 'white line') is a tendinous, fibrous raphe that runs vertically down the midline of the abdomen. It extends between the inferior limit of the sternum and the pubis, separating the rectus abdominis muscles.
Which of the following muscles flexes the vertebral column quizlet?
Rectus abdominis. Arises from the superior surface of the pubis and inserts into the costal cartilages of ribs 5-7/ It depresses the ribs, flexes the vertebral column and compresses the abdomen. It is supplied by nerves deriving from the anterior rami of the spinal nerves.
What muscle flexes the vertebral column and rotates the trunk?
Iliocostalis lumborum causes extension, abduction, and rotation of the spine and is innervated by the lumbar spinal nerve. The most superficial muscles of the posterior aspect of the lumbar region is the latissimus dorsi.
What does the sartorius do?
The function of the sartorius is unique in that it can serve as both a hip and knee flexor. The origin for the sartorius is the anterior superior iliac spine, sharing this origin with the tensor fascia lata. At the hip, it acts to both flex the hip as well as externally rotate.
What is the largest muscle in the human body?
gluteus maximusThe largest muscle in the body is the gluteus maximus. Located at the back of the hip, it is also known as the buttocks.
Why is it called rectus?
In Latin, rectus means straight and abdominis means abdominal. Therefore, rectus abdominis simply means straight abdominal, a term which references the structure of this paired muscle.
What is pyramidalis muscle?
Pyramidalis is a small triangular muscle located anterior to the lower part of rectus abdominis muscle within the rectus sheath. It is attached by tendinous fibres to anterosuperior margin of pubis and by the ligamentous fibres in front of the pubic symphysis.
What is the fascia Transversalis?
The transversalis fascia is a thin layer of connective tissue lining most of the abdominal cavity between the posterior surface of the transversus abdominis and superficial to the extraperitoneal fat and peritoneum.
What is the transversus abdominis?
The transverse abdominis is located in the abdomen immediately inside of the internal oblique muscle. It is one of the innermost muscles of the abdomen and it arises from the inguinal ligament, iliac crest, the inner surfaces of the lower six ribs and from the thoracolumbar fascia.
Which muscles help hold up the spine?
They include the large muscles in the lower back (erector spinae), which help hold up the spine, and gluteal muscles. Flexor muscles. Attached to the front of the spine, these muscles include the abdominal muscles. They allow us to flex, bend forward, lift and arch the lower back.
What are the erector spinae?
The superficial erector spinae include the spinalis, longissimus and iliocostalis groups of muscles. These muscles extend the neck and the vertebral column, while some will even move the ribs. The deep erector spinae muscles include the quadratus lumborum and multifidus muscles. What are the spinal flexors?
Which muscles perform lateral flexion of the vertebral column?
The major muscles involved are the rectus abdominis, external and internal obliques, erector spinae, semispinalis thoracis, latissimus dorsi, ...
Which muscle laterally flexes and rotates the head?
The major muscle that laterally flexes and rotates the head is the sternocleidomastoid. In addition, both muscles working together are the flexors of the head. Also to know is, which muscles would act as antagonists for lateral flexion of the vertebral column? The erector spinae muscles act as antagonists for the lateral flexion ...
Which muscle acts together in neck flexion?
The scalenes and the sternocleidomastoid act together in several muscle actions, such as lateral neck flexion. The sternocleidomastoid and the anterior scalene act together in neck flexion. Similar Asks.
