What muscle inserts above the scapular spine?
Rhomboid minor muscle – it inserts above the scapular spine. It performs actions like elevation and retraction of the scapula. It is supplied via the dorsal scapular nerve. Serratus anterior muscle – its insertion is along the medial border, from the superior angle to the inferior angle. This muscle protracts and rotates the scapula.
Where does the trapezius insertion into the scapula?
Inserting on the Scapula. Trapezius muscle – it inserts superiorly along the spine, acromion process, and clavicle. Levator scapulae muscle – they insert into the superior angle and medial border (superior to the spine). Rhomboid major muscle – its insertion is the medial border (inferior to the spine).
What is the function of levator scapulae?
Levator scapulae muscle – they insert into the superior angle and medial border (superior to the spine). Their roles are to elevation the scapula. They are innervation by branches of C3-C5.
What is the origin and insertion of the scapula?
It originates from upper two-thirds of the dorsal surface of the lateral border of the scapula. It inserts on lowest impression on the greater tubercle of the humerus.
Which muscle inserts on the anterior surface of the scapula?
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). The muscle is further divided into three parts: Superior part: 1st to 2nd rib → superior angle of the scapula.
What muscles are located on the anterior side of the scapula?
Anterior axio-appendicular shoulder muscles. Anterior shoulder muscles, also called the pectoral muscles, attach the upper extremity to the clavicle and the thoracic cage. These muscles include the pectoralis major, pectoralis minor, subclavius and the serratus anterior muscle.
What muscles keep the scapula flat?
3 Specifically, the muscles of the scapula function as follows:Serratus Anterior. The serratus anterior is an important scapular stabilizing muscle. ... Rhomboids. The rhomboids (major and minor) function to stabilize the medial border of the scapula. ... Trapezius (Upper/Middle/Lower) ... Levator Scapulae. ... Normal Biomechanics.
What is the anterior aspect of the scapula called?
The front of the scapula (also known as the costal or ventral surface) has a broad concavity called the subscapular fossa, to which the subscapularis muscle attaches.
How many muscles insert on the scapula?
17 different musclesIt connects with the humerus at the glenohumeral joint as well as the clavicle at the acromioclavicular joint to form the shoulder joint. In total, 17 different muscles attach to the scapula, which makes it difficult to fracture.
Which of the following muscles moves the scapula quizlet?
Levator scapulae m. N: dorsal scapular n. Rhomboid minor m.
How do you get a flat scapula?
1:2611:18Fix Scapula Winging (FULL ROUTINE) - YouTubeYouTubeStart of suggested clipEnd of suggested clipSide you know place the hand and Abbey on the back of your neck. And then all you're gonna do thereMoreSide you know place the hand and Abbey on the back of your neck. And then all you're gonna do there is try to sniff that opposite armpit and try and push. And kind of lift with the hand.
What causes anterior tipping of the scapula?
Anterior/Posterior Tipping Anterior tipping that is isolated to or occurs excessively at the AC joint will result in prominence of the inferior angle of the scapula. An anteriorly tipped scapula may occur in pathologic situations (poor neuromuscular control) or in abnormal posture.
How do you flatten your scapula?
Start in a standing position, touching the hands above the head. The elbows should be bent and point outward to each side. Maintaining the bend in the elbows, bring the arms down, so that the elbows point toward the floor, while squeezing the shoulder blades together. Repeat this 12–15 times.
What attaches to the posterior surface of the scapula?
Scapular spine (Spina scapulae) is a long ridge that runs diagonally across the upper posterior surface of the bone. The trapezius and posterior deltoid muscles attach to the surface of this prominent elevation..
Is serratus anterior muscle?
The serratus anterior acts to pull the scapula forward around the thorax. The muscle is named from Latin: serrare = to saw, referring to the shape, anterior = on the front side of the body....Serratus anterior muscle.Serratus anteriorArterylateral thoracic artery, superior thoracic artery (upper part), thoracodorsal artery (lower part)15 more rows
Which muscle inserts on the clavicle and the acromion and spine of the scapula?
The trapezius muscle inserts on the scapular spine, acromion, and posterosuperior lateral clavicle. The contraction of its various parts can therefore elevate, suspend, stabilize, and rotate the scapula. The serratus anterior works with the trapezius, inserting along the medial edge of the scapula's costal surface.
Where is the serratus anterior muscle?
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.
Is serratus anterior muscle?
The serratus anterior acts to pull the scapula forward around the thorax. The muscle is named from Latin: serrare = to saw, referring to the shape, anterior = on the front side of the body....Serratus anterior muscle.Serratus anteriorArterylateral thoracic artery, superior thoracic artery (upper part), thoracodorsal artery (lower part)15 more rows
Where are the scapular muscles?
The scapula, or shoulder blade, is a large triangular-shaped bone that lies in the upper back. The bone is surrounded and supported by a complex system of muscles that work together to help you move your arm.
What muscle sits on top of the scapula?
Supraspinatus: This muscle stretches from the top of the scapula to the top of the humerus, at the ball of your shoulder joint.
Which muscles attach to the scapula?
The scapula provides attachment for several groups of muscles. scaplular muscles include the supraspinatus, subscapularis, teres minor, infraspinatus, deltoid and teres major. These muscles attach to the scapular surface and assist with abduction and external and internal rotation of the glenohumeral joint.
How to strengthen scapular muscles?
Strengthening exercise of scapular muscles : 1. STANDING ROWS : Stand facing anchor with resistance band at elbow height. Step back until the arms are straight and the band has mild tension. Stand tall, bringing shoulders down and back and engage abdominal muscles (do not hunch shoulders or push out ribs).
What muscles are used to abduct the head of the humerus?
Along with other scapular muscles it steadies the head of humerus during arm movements. It also act as abductor of shoulder joint from 0-15 degree
Where is the humerus insert?
It inserts on the medial lip of the bicipital groove of the humerus.
How to stretch your back and shoulders?
Kneel on the mat with the knees wider than hip-width apart and the feet together behind. Sit back on the heels and fold forward, resting the belly on the thighs. Extend the arms out in front and rest the forehead on the floor. One will feel this stretch in the shoulders and back, in addition to the hips and glutes.
What muscles do you feel when you have a shoulder injury?
One should feel the muscles between the shoulder blades activate and the chest open up.
Which hand to grab on left bicep?
Reach across the front of the body with the right hand and grab onto the left bicep or elbow.
How many muscles are attached to the scapula?
As the scapula has a large surface area, a large number of muscles get attached to it. The 17 muscles attached here, fix the scapula to the thoracic wall and allow it to move. Four muscles, namely subscapularis, infraspinatus, teres minor, and supraspinatus, form the rotator cuff, covering the shoulder capsule.
Which muscle protracts, rotates, and stabilizes the scapula?
Serratus anterior muscle: The insertion is along the medial border, from the superior to the inferior angle. It protracts, rotates, and stabilizes the scapula.
What joint is between the glenoid fossa and the rounded head of the humerus?
Glenohumeral joint: This is a ball and socket joint formed between the glenoid fossa of the scapula and the rounded head of the humerus.
How many ways does the scapula move?
The movement of this bone is coupled with the humerus, meaning whenever you move your arm, your scapula also moves. It can move in six different ways, towards (retract) and away (protract) from the vertebral column, up and down (elevate and depress), and also rotate upwards and downwards. There are 17 muscles attached to it that help to produce these movements.
Where is the Glenoid Fossa located?
Glenoid fossa – It is a shallow pyriform cavity located at the lateral angle of the scapula. It articulates with the rounded head of the humerus, forming the glenohumeral (shoulder) joint.
What is the infraspinous fossa?
Infraspinous fossa: It is the area below the spine of the scapula. It is convex and much larger than the preceding one. At its upper part, towards the vertebral margin, it shows a shallow concavity. In the center, it is convex, while near the lateral border, it has a deep groove running from the upper toward the lower part.
Which muscle is inserted superiorly along the spine, acromion process, and clavicle?
Trapezius muscle: Gets inserted superiorly along the spine, acromion process, and clavicle. It helps to elevate and rotate the scapula during protraction of the humerus beyond 90 degrees.
Where is the scapula located?
The scapula, also known as the shoulder blade, is a flat triangular bone located at the back of the trunk and resides over the posterior surface of ribs two to seven. The scapula, along with the clavicle and the manubrium of the sternum, make up the pectoral (shoulder) girdle which connects the upper limb of the appendicular skeleton to ...
Which muscle inserts superiorly along the spine, acromion process, and clavicle?
Trapezius muscle – it inserts superiorly along the spine, acromion process, and clavicle. Its actions include elevation of the scapula and rotation of scapula during abduction of humerus beyond 90 degrees. It is innervated by the accessory nerve.
Why does my scapula wing?
Another cause of winging of the scapula is fascioscapulohumeral dystrophy, an autosomal dominant condition affecting several muscles related to the scapula: serratus anterior, rhomboids, trapezius, teres major and minor, pectoralis minor and major, biceps, and triceps muscle.
What are the three borders of the scapula?
Like any triangle, the scapula consists of three borders: superior, lateral and medial. The superior border is the shortest and thinnest border of the three. The medial border is a thin border and runs parallel to the vertebral column and is therefore often called the vertebral border. The lateral border is often called the axillary border as it runs superolaterally towards the apex of the axilla. It is the thickest and strongest of the three borders for muscle attachment. It also has the glenoid cavity or socket along this border, a shallow fossa which articulates with the head of the humerus, forming the glenohumeral joint.
Where does the deltoid muscle originate?
Deltoid muscle – it originates inferiorly along the scapula spine to the acromion (and lateral third of the clavicle). Its actions include flexion and medial rotation (anterior fibres), abduction (middle fibres), extension and lateral rotation (posterior fibres) at the shoulder joint. It is innervated by the axillary nerve .
Which cavity is inferior to the coracoid process?
Inferior to the coracoid process is the glenoid cavity. Superiorly lies the lateral part of the clavicle and medial to the coracoid process is the suprascapular notch (for nerve passage) which connects the base of the coracoid process to the superior border. The coracoid process allows the attachment of various muscles and ligaments.
Which surface of the scapula is concave?
The scapula has two surfaces; on the anterior aspect is the smooth costal surface, which is concave in shape and is majorly taken up by the subscapular fossa. At the back of the scapula is the convex and uneven posterior surface which has a protruding ridge of bone ( spine of the scapula) that unevenly separates it into two divisions: the superior supraspinous fossa and the much bigger, inferior infraspinous fossa.
What is the inferior part of the scapula?
Inferior part: 4th to 8/9th rib → medial border and inferior angle of the scapula. (The lowest attachment may alternatively extend to the 10th rib in approximately 10% of the population, as well as blend with the external abdominal oblique muscle.)
What are the parts of the scapula?
The muscle is further divided into three parts: Superior part: 1st to 2nd rib → superior angle of the scapula. Intermediate part: 2nd to 3rd rib → medial border of the scapula. Inferior part: 4th to 8/9th rib → medial border and inferior angle of the scapula.
What is the function of the serratus anterior?
Another function of the serratus anterior is the active stabilization of the scapula within the shoulder. Finally, in a fixed scapula the muscle lifts the ribs and acts as an accessory inspiratory muscle.
What is the movement of the scapula along the ribs?
The contraction of the entire serratus anterior leads to a anterolateral movement of the scapula along the ribs. Due to the pull of the inferior part at the lower scapula, the shoulder joint is shifted superiorly. This shifting now enables to lift the arm above 90° ( elevation ).
What muscle is seen in a human cadaver?
Serratus anterior muscle seen in a human cadaver. Notice how the muscle fibers follow the course of the ribs onto which they attach.
What causes the serratus anterior to be damaged?
Common causes are operations in the axilla (e.g. lymph node removal), a compression due to carrying heavy loads (e.g. backpack) and trauma.
Where does the vascular supply to the serratus anterior come from?
The vascular supply to the serratus anterior comes from the superior and lateral thoracic arteries (branches of the axillary artery ) as well as branches from the thoracodorsal artery (branch of subscapular artery ).