What muscle flexes the vertebral column

Name of MuscleActionIliocostalisExtends and flexes laterally vertebral columnLongissimusExtends and flexes laterally vertebral columnSpinalisExtends vertebral columnSemispinalisExtends neck and vertebral column

Which muscle is responsible for flexion of the vertebral column?

The erector spinae group forms the majority of the muscle mass of the back and it is the primary extensor of the vertebral column. It controls flexion, lateral flexion, and rotation of the vertebral column, and maintains the lumbar curve.

What is flexion of the vertebral column?

For the vertebral column, flexion (anterior flexion) is an anterior (forward) bending of the neck or body, while extension involves a posterior-directed motion, such as straightening from a flexed position or bending backward. Lateral flexion is the bending of the neck or body toward the right or left side.

What muscles perform flexion of 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 tilts the pelvis posteriorly?

Rectus abdominis is a long strap muscle that extends the entire length of the anterior abdominal wall lies close to the midline, it is an important postural and core muscle. With a fixed pelvis, contraction results in flexion of the lumbar spine. When the ribcage is fixed contraction results in a posterior pelvic tilt.

Which of the following muscles are responsible for the lateral flexion of the vertebral column quizlet?

When acting only on one side of the spinal column (left or right), the quadratus lumborum laterally flexes the lumbar spine.

What muscle flexes and laterally flexes the trunk?

Quadratus lumborum is involved in extending the trunk and flexing it laterally to the ipsilateral side.

What are spinal erectors?

The erector spinae muscles are a group of long muscles that originate near the sacrum and extend vertically up the length of the back. The erector spinae muscles lie on each side of the vertebral column and extend alongside the lumbar, thoracic, and cervical sections of the spine.

What muscle is the prime mover for forearm flexion?

During forearm flexion, for example lifting a cup, a muscle called the biceps brachii is the prime mover. Because it can be assisted by the brachialis, the brachialis is called a synergist in this action (Figure 11.1. 1). A synergist can also be a fixator that stabilizes the muscle’s origin.

Which muscle flexes the vertebral column and compresses the abdomen?

Name of MuscleActionExternal abdominal obliqueCompression of abdomen, flexion and rotation of vertebral columnInternal abdominal obliqueCompression of abdomen, flexion and rotation of vertebral columnTransversus abdominisCompression of abdomenRectus abdominisCompression of abdomen and flexion of vertebral column

Article first time published on

What is elbow flexion?

When your forearm moves toward your body by bending at your elbow, it’s called elbow flexion. The opposite movement is called elbow extension. The three bones involved in elbow flexion are the: humerus, in your upper arm. ulna, on the little finger side of your forearm.

Why is the vertebral column curved?

Vertebral column is curved or ‘S-shaped’ to maintain the balance of the body in an erect position. The curve absorbs pressure and shock while walking, running and protects the column from breaking.

What muscle flexes upper arm and helps abduct it?

MuscleLocationFunctionPectoralis MajorAnterior part of the chestFlexes the upper arm and helps to abduct the upper arm

Which quadriceps muscle extends the leg and flexes the thigh?

Rectus Femoris It runs straight down the leg (the Latin for straight is rectus), and attaches to the patella by the quadriceps femoris tendon. Actions: The only muscle of the quadriceps to cross both the hip and knee joints. It flexes the thigh at the hip joint, and extends at the knee joint.

Does the rectus abdominis flex the vertebral column?

The rectus abdominis muscles are a pair of long muscles that run vertically up the front of the abdomen, stretching from the pubis to the xiphoid process. … As one of the primary movers in spine flexion, the rectus abdominis also helps to flex the vertebral column and bring the pelvis forward.

What muscle flexes the trunk?

Rectus abdominis flexes the trunk. If you shorten the front of the body and round forward (just like you do in the abdominal crunch), you will feel it working. We shouldn’t do too much of that without balancing it out with other actions. Erector spinae muscles extend the spine.

What flexes and rotates the trunk?

The skeletal muscles of the abdomen form part of the abdominal wall, which holds and protects the gastrointestinal system. Five muscles form the abdominal wall, divided into vertical and flat groups. The flat muscles act to flex, laterally flex, and rotate the trunk.

What muscles cause trunk flexion?

TRUNK FLEXION The major actions involved are bilateral activity of the rectus abdominis, external and internal oblique, and psoas major.

Which of the following muscles are responsible for the lateral flexion of the vertebral column?

The quadratus lumborum aids in lateral flexion of the vertebral column.

Which of the following muscles acts primarily to laterally flex the vertebral column?

DefinitionThree groups of deep muscles located on either side of the vertebral columnFunctionBilateral contraction – extension of spine Unilateral contraction – lateral flexion of spine (ipsilateral)MnemonicI Like Standing (stands for Iliocostalis, Longissimus & Spinalis)

Which muscle S of the vertebral column attaches to the iliac crest and Iliolumbar ligament?

Quadratus lumborum muscleOriginPosterior border of iliac crestInsertionInferior border of 12th rib and L1-L5ArteryLumbar arteries, lumbar branch of iliolumbar arteryNerveThe twelfth thoracic and first through fourth ventral rami of lumbar nerves (T12, L1-L4)

What muscle flexes the elbow and Supinates the forearm?

Superficial muscles of the chest and upper arm: The biceps brachii is located in the anterior compartment of the upper arm and flexes and supinates the forearm at the elbow.

What muscles are responsible for flexing and extending the arm at the elbow?

Muscles of the Elbow Joint Biceps brachii: upper arm muscle enabling flexion of the arm. Triceps brachii: muscle in the back of the upper arm that extends the arm and fixes the elbow during fine movements. Brachialis: upper arm muscle beneath the biceps which flexes the elbow towards the body.

When the arm flexes bends upward which muscle contracts?

When one muscle is contracted, the other muscle from the pair is always elongated. For example, the biceps and triceps muscles work together to allow you to bend and straighten your elbow. When you want to bend your elbow, your biceps muscle contracts (Figure below), and, at the same time, the triceps muscle relaxes.

Where is the spinalis muscle?

spinalis muscle, any of the deep muscles of the back near the vertebral column that, as part of the erector spinae (sacrospinalis) muscle group, assist in extension (e.g., bending backward), lateral flexion (bending to the side), and rotation of the spine.

What is Multifidi?

Multifidus muscle (musculi multifidi) Multifidus is a group of short, triangular muscles that along with the semispinalis and rotatores comprises the transversospinal group of deep back muscles. They are the thickest muscles in the transversospinal group, and are shorter than semispinalis, but longer than rotatores.

What does the longissimus muscle do?

The erector spinae muscles, including longissimus, are the most powerful extensors of the vertebral column. Hence their main actions include spine extension and lateral flexion. Longissimus capitis also rotates the head.

What muscle flexes and rotates thigh and leg?

The sartorius muscle is able to flex, adduct and laterally rotate the thigh. It also is able to flex the knee and medially rotates the leg.

Which muscle flexes and rotates the vertebral column toward the opposite side of the body?

MuscleOriginActionIlliocastalis thoracisSuperior borders of inferior seven ribs medial to the anglesStabilizes thoracic vertebrae in extensionSemispinalis thoracisTransverse processes of T6- T10Extends vertebral column and rotates toward opposite side

Which muscle flexes and rotates the vertebral column toward the opposite side?

Action. The transversospinalis muscles group share the same action, bilateral contraction extends the spine and unilateral contraction rotates the vertebral column to the opposite side.

What muscles flex the elbow?

The muscles involved in flexion (bending) the elbow are the biceps brachii, brachioradialis and the brachialis. The triceps are responsible for elbow extension (straightening the arm).