What is the origin insertion and action of the serratus anterior?
What is the origin insertion and action of the serratus anterior?
The serratus anterior (SA) is a fan-shaped muscle that originates on the superolateral surfaces of the first to eighth or ninth ribs at the lateral wall of the thorax and inserts along the superior angle, medial border, and inferior angle of the scapula.
What is the action of the serratus anterior muscle?
The serratus anterior muscle pulls the scapula forward around the thorax, which allows for anteversion and protraction of the arm.
What is the origin and insertion of serratus posterior?
The serratus posterior inferior originates on the supraspinal ligament, and the spinous processes of the upper two to three lumbar vertebrae (L01–L03) and the lower two thoracic vertebrae (T11–T12). It inserts on the lower borders of ribs 9–12, and is innervated by intercostal nerves 9–12.
What is the insertion of the serratus anterior?
Origin and insertion The serratus anterior muscle originates at the 1st to 8/9th rib and inserts at the anterior surface of the medial border of the scapula (extending from the superior to inferior angles).
Which is the origin of the serratus anterior quizlet?
The origin of serratus anterior is the surfaces of the upper seven ribs at the side of the chest. The origin of the levator scapulae muscle is the spinous processes of the upper four cervical vertebrae (C1-4). The medial border of the scapula above the scapular spine is the insertion point of the levator scapulae.
What is the area of insertion for serratus anterior quizlet?
The insertion of the serratus anterior muscle is on the anterior aspect of the whole length of the medial border of the scapula. The origin of the serratus anterior muscle is the surface of the upper seven ribs at the side of the chest.
What is the origin and insertion of the pectoralis minor?
It originates from the margins of the third to fifth ribs adjacent to the costochondral junction. The fibers consequently pass upward and laterally to insert into the medial border and superior surface of the coracoid process of the scapula.
What is the origin and insertion of the trapezius muscle?
Trapezius Attachments It originates on the occipital bone, the ligamentum nuchae, and the spinous processes of T01–T12. The trapezius inserts on the lateral third of the clavicle, as well as the acromion and scapular spine of the scapula.
What are the action of the serratus posterior inferior?
Function. The serratus posterior inferior draws the lower ribs backward and downward to assist in rotation and extension of the trunk. This movement of the ribs may also contribute to inhalation and forced expiration of air from the lungs.
Which is the origin of the serratus posterior superior?
Origin and insertion The serratus posterior superior muscle arises as a thin tendinous sheet from the nuchal ligament and spinous processes of vertebrae C7-T3, as well as the associated supraspinous ligaments. The muscle fibers extend inferolaterally towards the lateral aspect of the posterior thoracic cage.
How do muscles origin and insertion differ?
In most cases, one end of the muscle is fixed in its position, while the other end moves during contraction. 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.
What action does serratus anterior and pectoralis minor perform on scapula?
It is crucial in the stabilization of the scapula by pulling it downward and anteriorly against the thoracic wall. The pectoralis minor muscle creates a passage between the ribs for the transit of the brachial plexus and both the subclavian artery and vein.
What is an origin and insertion of a muscle?
A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. If the place is a bone that remains immobile for an action, the attachment is called an origin. If the place is on the bone that moves during the action, the attachment is called an insertion.
What is the origin and insertion of the deltoid?
The deltoid is a thick, triangular shoulder muscle. It gets its name because of its similar shape to the Greek letter ‘delta’ (Δ). The muscle has a wide origin spanning the clavicle, acromion and spine of scapula. It passes inferiorly surrounding the glenohumeral joint on all sides and inserts onto the humerus.
What is the origin and insertion of the levator scapulae?
Origin and insertion Levator scapulae originates from the transverse processes of the first four cervical vertebrae. The muscle fibers descend laterally to insert at the superior angle and medial border of scapula, between the superior angle and base of the spine of scapula.
Which is the insertion of the serratus posterior inferior?
| Serratus posterior inferior muscle | |
|---|---|
| Origin | Vertebrae: Spinous processes of T11 – L2 |
| Insertion | The inferior borders of the 9th through 12th ribs |
| Artery | Intercostal arteries |
| Nerve | Intercostal nerves T9 through T12 |
What is the action of the serratus posterior superior?
Serratus posterior superior: elevate the ribs during inspiration(accessory muscle of inspiration) and has a stabilization role for thorax. Bilateral action of posterior superior/posterior inferior reduce extension of thoracic vertebrae. Unilateral action: rotate spine to opposite side.
Which is the insertion of the serratus posterior superior?
| Serratus posterior superior muscle | |
|---|---|
| Origin | Nuchal ligament (or ligamentum nuchae) and the spinous processes of the vertebrae C7 through T3 |
| Insertion | The upper borders of the 2nd through 5th ribs |
| Artery | Intercostal arteries |
| Nerve | 2nd through 5th intercostal nerves |
Which of the following is an action of the serratus posterior inferior?
What is serratus anterior pain and how to manage?
Difficulty in deep breathing
Do push ups work the serratus anterior?
The standard push-up works the anterior serratus somewhat, but a few tweaks to your basic form can help you really amp up the activation of this muscle. The push-up plus isn’t that different than a standard push-up, but it does wonders for the small serratus anterior muscle.
What nerve innervates serratus anterior?
– Superior trunk of brachial plexus between scalenus anticus and medius – Branches of C5, C6, and C7 – Dorsal scapular nerve (supplies levator scapulae and rhomboids) – Long thoracic nerve (innervates serratus anterior)
What does musculus serratus anterior mean?
The serratus anterior muscle spans the upper eight or nine ribs. This muscle helps you rotate or move your scapula (shoulder blade) forward and up. Sometimes it’s referred to as the “boxer’s muscle” since it’s responsible for the movement of the scapula when a person throws a punch.
