What muscles attach to clavicle?
The clavicle is an S-shaped bone that is anchored by strong ligamentous attachments on both its medial and lateral ends. Muscular attachments to the clavicle include the sternocleidomastoid, pectoralis major, and subclavius muscles proximally and the deltoid and trapezius muscles distally.
What muscles attach to bicipital groove?
Three muscle tendons insert on the bicipital groove region:
- lateral lip (crest of the greater tuberosity): pectoralis major.
- floor: latissimus dorsi.
- medial lip (crest of the lesser tuberosity): teres major.
What does the clavicle attach to?
The clavicle is a sigmoid-shaped long bone with a convex surface along its medial end when observed from cephalad position. It serves as a connection between the axial and appendicular skeleton in conjunction with the scapula, and each of these structures forms the pectoral girdle.
What is the weakest part of the clavicle?
Most common site of fracture is the middle third segment of the clavicle because its weakest point is at the junction of the middle and lateral third of the clavicle.
Can the clavicle move?
During elevation, the clavicle rotates upward on the manubrium and produces an inferior glide to maintain joint contact. The reverse actions happen when the clavicle is depressed. The motions are usually associated with elevation and depression of the scapula.
What two bony landmarks make up the outer edges of the bicipital groove?
The bicipital groove (intertubercular groove, sulcus intertubercularis) is a deep groove on the humerus that separates the greater tubercle from the lesser tubercle. It allows for the long tendon of the biceps brachii muscle to pass….
| Bicipital groove | |
|---|---|
| FMA | 23396 |
| Anatomical terms of bone |
Which ligament holds the bicep tendon in place?
The long head of biceps tendon travels deep into the shoulder joint and actually merges with the lining of the joint. The tendon sits in a deep groove in the arm bone called the ‘bicipetal groove’ and it is held in place in that groove by a ligament called the transverse humeral ligament.
What should you not do with a broken collarbone?
For about the first 4–6 weeks:
- Avoid raising your arms above shoulder level.
- Avoid lifting anything that weighs more than 5 pounds (2.3 kg).
- Stay out of all sports and physical education.
- Do all exercises to prevent elbow and shoulder stiffness and to help with muscle strength.
- Go to physical therapy, if needed.
Why does clavicle have two primary centers?
We confirmed that the clavicle is formed by two membranous primary ossification centers appearing by 6 weeks and fusing approximately 1 week later. In time, the medial cartilaginous mass contributes more to the growth in length of the clavicle than the lateral cartilaginous mass.
Can you live without a clavicle?
Despite its location, the clavicles are not indispensable to protect these organs, even though they do contribute to this role. Some people don’t develop collarbones; they can be born without them, have defective ones, or grow them at an older age.
Where is the clavicle most likely to fracture?
The most common fractures of the clavicle are in the middle of the shaft of the bone, approximately halfway between the sternum and the AC joint. The most common way to treat the fractures in the middle is with immobilization with either a sling or a special bandage called a figure-of-8 splint.
Where do muscles attach to the bicipital groove?
Bicipital Groove: Attachments of Muscles. Teres major attaches to medial lip of groove. Pectoralis major to lateral lip of groove. Latissimus (Lady) is on floor of groove, between the 2 majors.
Are there any muscular attachments to the clavicle?
Muscular attachments to the clavicle include the sternocleidomastoid, pectoralis major, and subclavius muscles proximally and the deltoid and trapezius muscles distally. There are no muscular or ligamentous attachments on the middle section of the clavicle, and this supports the fact that most fractures occur in this area.
How big is the bicipital groove in the shoulder?
It is usually around 8 cm long and 1 cm wide in adults. It lodges the long tendon of the biceps brachii muscle between the tendon of the pectoralis major muscle on the lateral lip and the tendon of the teres major muscle on the medial lip. It also transmits a branch of the anterior humeral circumflex artery to the shoulder joint.
Which is tendon lodges in the bicipital groove?
The bicipital groove lodges the long tendon of the biceps brachii between the tendon of the pectoralis major on the lateral lip and the tendon of the teres major on the medial lip.
