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 the axial skeleton.
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Scapula.
| Borders | Superior, lateral and medial |
|---|---|
| Processes | Coracoid, acromion |
What part of the body is the scapula?
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.
How is the scapula attached to the axial skeleton?
The bones that attach each upper limb to the axial skeleton form the pectoral girdle (shoulder girdle). This consists of two bones, the scapula and clavicle (Figure 2). … It is attached on its medial end to the sternum of the thoracic cage, which is part of the axial skeleton.
Where is the acromion of the scapula?
In human anatomy, the acromion (from Greek: akros, “highest”, ōmos, “shoulder”, plural: acromia) is a bony process on the scapula (shoulder blade). Together with the coracoid process it extends laterally over the shoulder joint. The acromion is a continuation of the scapular spine, and hooks over anteriorly.
Is the scapula anterior or posterior?
The scapula is described as having superior, medial, and lateral borders. Posteriorly, the scapula is divided into a supraspinous fossa and infraspinous fossa by the scapular spine. Anteriorly, on the costal surface, is the shallow subscapular fossa. Laterally is the glenoid fossa.
Is the scapula attached to the ribs?
The scapula is a flat, triangular-shaped bone (colloquially as the “shoulder blade”). It is located in the upper thoracic region on the dorsal surface of the rib cage. It connects with the humerus at the glenohumeral joint as well as the clavicle at the acromioclavicular joint to form the shoulder joint.
Which bone feature of the scapula is posterior?
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.
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Scapula.
| Borders | Superior, lateral and medial |
|---|---|
| Processes | Coracoid, acromion |
Is the scapula a flat bone?
Your scapula is a flat bone that’s commonly referred to as your shoulder blade. You have two of these triangle-shaped bones in your upper back. The muscles that allow your arms to rotate attach to your scapula.
Is the acromion anterior or posterior?
On the anterior side, facing into the body, is a right-angled process called the coracoid process. While at the superior lateral edge of the scapula the glenoid cavity, which serves as the socket for the head of the humerus bone. The glenoid cavity always points laterally, while the spine and acromion are posterior.
What is acromion bone?
Acromion. The roof (highest point) of the shoulder that is formed by a part of the scapula. Tendons. The tough cords of tissue that connect muscles to bones.
What joint connects the shoulder blade to the chest & Ribs?
The sternoclavicular joint is located where the clavicle meets the sternum at the top of the chest. The scapulothoracic joint is sometimes considered a joint. It is located where the scapula glides against the thoracic rib cage at the back of the body. No ligaments connect the bones at this joint.
Where is the scapula bone found?
scapula, also called shoulder blade, either of two large bones of the shoulder girdle in vertebrates. In humans they are triangular and lie on the upper back between the levels of the second and eighth ribs.
What bones does the scapula articulate with?
The scapula articulates with the humerus and the clavicle. The scapula is flat and triangular. The scapula articulates with the humerus at the glenoid fossa and the clavicle at the acromion process.
Is the scapula a joint?
Picture of the Shoulder. The shoulder is one of the largest and most complex joints in the body. The shoulder joint is formed where the humerus (upper arm bone) fits into the scapula (shoulder blade), like a ball and socket.
What is the only skeletal connection between the scapula and the thorax?
Your clavicle provides the only direct connection between your pectoral girdle and axial skeleton.
What tendons are attached to the scapula?
The glenohumeral joint is where the ball (humeral head) and the socket (the glenoid) meet. The rotator cuff connects the humerus to the scapula and is made up of the tendons of four muscles, the supraspinatus, infraspinatus, teres minor and the subscapularis. Tendons attach muscle to bone.
Is the sternum part of the axial skeleton?
Your axial skeleton is made up of the 80 bones within the central core of your body. This includes bones in your skull (cranial and facial bones), ears, neck, back (vertebrae, sacrum and tailbone) and ribcage (sternum and ribs).
What part of the scapula articulates with the clavicle?
At its lateral end the spine gives rise to this flat, angulated projection, the acromion, which stands completely clear of the bone. The clavicle articulates with the scapula here, at the tip of the acromion. This other projection, looking like a bent finger, is the coracoid process.
What type of bones are flat bones?
Flat bones are made up of a layer of spongy bone between two thin layers of compact bone. They have a flat shape, not rounded. Examples include the skull and rib bones. Flat bones have marrow, but they do not have a bone marrow cavity.
Which are the flat bones?
There are flat bones in the skull (occipital, parietal, frontal, nasal, lacrimal, and vomer), the thoracic cage (sternum and ribs), and the pelvis (ilium, ischium, and pubis). … Flat bones are somewhat flattened, and can provide protection, like a shield, flat bones can also provide large areas of attachment for muscles.
What type of bone is a metatarsal?
The five metatarsals are dorsally convex long bones consisting of a shaft or body, a base (proximally), and a head (distally). The body is prismoid in form, tapers gradually from the tarsal to the phalangeal extremity, and is curved longitudinally, so as to be concave below, slightly convex above.
What holds the scapula in place?
The scapula is only attached to the thorax by ligamentous attachments at the acromioclavicular joint and through a suction mechanism provided by the muscular attachments of the serratus anterior and subscapualaris.
What is the acromion of the shoulder?
The acromion is the bony tip of the outer edge of your shoulder blade (scapula) that comes off the top of the back side of this bone. It meets with the end of your collar bone (clavicle) at your shoulder. Shoulder impingement occurs when the tendon rubs against the acromion.
What is scapula pain?
The most common cause of shoulder blade pain is muscle strain. 2 That’s often from short-term overuse of your arms and upper body. The scapula pain may be accompanied by pain in other muscle groups. That can include the shoulder and back. But it may be felt only in your shoulder blade.
What is the shoulder joint called?
The glenohumeral joint is the one most people think of as the shoulder joint. It is formed where a ball (head) at the top of the humerus fits into a shallow cuplike socket (glenoid) in the scapula, allowing a wide range of movement.
What type of joint connects the shoulder blade scapula and the collarbone clavicle?
The acromioclavicular joint connects the upper part of the shoulder blade (the acromion) to the collarbone.
What type of joint connects the shoulder blade and the collarbone?
The acromioclavicular joint connects the clavicle to the acromion, which is part of the shoulder blade or scapula.
What muscles are attached to the shoulder blade?
The intrinsic muscles of the scapula include the rotator cuff muscles, teres major, subscapularis, teres minor, and infraspinatus. These muscles attach the scapular surface and assist with abduction and external and internal rotation of the glenohumeral joint.
What does scapular mean in anatomy?
In anatomy, the scapula (plural scapulae or scapulas), also known as the shoulder bone, shoulder blade, wing bone, speal bone or blade bone, is the bone that connects the humerus (upper arm bone) with the clavicle (collar bone).
What does the scapula mean?
(SKA-pyoo-luh) One of a pair of triangular bones at the back of the shoulder. The scapula connects the collarbone with the upper arm bone. Also called shoulder blade.
What bone articulates to the scapula and the ulna?
The humerus articulates with the scapula at the shoulder and with the radius and ulna at the elbow.
Is the shoulder a synovial joint?
Synovial joints vary in structure—for example, the shoulder is a ball-and-socket joint and the knee is a hinge joint—but they all have the following in common: Synovial joints allow for movement.
What type of joint is the finger?
Metacarpophalangeal Joint (MCP joint)
A single hand bone is called a phalanx. MP joints are important for both power grip and pinch activities, they are where the fingers move with respect to the hand. The MP joints allows you to bend and flex your fingers, spread your fingers, and bring the fingers together.
Which bones form the shoulder joint quizlet?
Shoulder joint: Bones and ligaments
- Scapula.
- Humerus.
- Clavicle.