What is the tubercle of the humerus?
What is the tubercle of the humerus?
The greater tubercle is the most lateral portion of the proximal end of the humerus. It consists of three smooth and flat impressions at the posterosuperior aspect for the attachment of muscles. From superior to inferior, the muscles that attach at these impressions are the: supraspinatus.
What attaches to greater tubercle of humerus?
The greater tuberosity is the prominent area of bone at the top of the humerus and is the attachment for the two large, powerful rotator cuff muscles – supraspinatus and infraspinatus.
What bone contains the greater tubercle?
proximal humerus
Located on the lateral side of the proximal humerus is an expanded bony area called the greater tubercle. The smaller lesser tubercle of the humerus is found on the anterior aspect of the humerus. Both the greater and lesser tubercles serve as attachment sites for muscles that act across the shoulder joint.
What attaches to lesser tubercle of humerus?
The lesser tuberosity is much smaller, and more medially located on the bone. It only has an anterior surface. It provides attachment for the last rotator cuff muscle – the subscapularis.
Where is your humerus bone located?
upper arm
The humerus is the bone in your upper arm. It’s located between your elbow and your shoulder, and consists of several parts that allow it to move freely in different directions.
What muscles connect to the humerus?
The pectoralis major, latissimus dorsi, deltoid, and rotator cuff muscles connect to the humerus and move the arm.
What muscles flex the humerus?
The pectoralis minor and pectoralis major are large muscles of the chest that participate in many movements, including flexion of the humerus.
What is the function of the humerus bone?
Function. The humerus serves as an attachment to 13 muscles which contribute to the movements of the hand and elbow, and therefore the function of the upper limb.
Where are the tubercles of the humerus located?
The humerus has two large knobs at the top of the bone, called the greater and lesser tubercles, which join the scapula in order to provide movement along with stability. The rhythm between the scapula and the humerus is a very important one for adequate shoulder function.
What do you need to know about the humerus?
The Anatomy of the Humerus 1 Anatomy. The humerus has two large knobs at the top of the bone, called the greater and lesser tubercles, which join the scapula in order to provide movement along with 2 Function. The head of the humerus makes up a portion of the ball-and-socket shoulder joint. 3 Associated Conditions. 4 Rehabilitation.
Why are there two knobs at the top of the humerus?
The meeting of these bones allows for the wide range of motion which is possible at the shoulder joint, along with movement at the elbow. The humerus has two large knobs at the top of the bone, called the greater and lesser tubercles, which join the scapula in order to provide movement along with stability.
What kind of fracture is the humerus bone?
The humerus — also known as the upper arm bone — is a long bone that runs from the shoulder and scapula (shoulder blade) to the elbow. Fractures of the humerus are classified in one of two ways: proximal humerus fracture or humerus shaft fracture. A proximal humerus fracture usually occurs close to…
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