What does humeral head mean?

Definition. noun, plural: humeral heads. The large rounded head of the humerus and articulates with the glenoid cavity of the scapula forming the glenohumeral joint.

What is the humeral?

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. Your humerus has important functions related to both movement and support.

What is the function of the head of the humerus?

The head of the humerus makes up a portion of the ball-and-socket shoulder joint. This area also serves as the insertion point for muscles which make up the shoulder girdle.

What is the Scapulohumeral rhythm?

Scapulohumeral rhythm: the coordinated motion of the scapula and humerus experienced during shoulder movement and motion that has been traditionally viewed as occurring at a ratio of 2:1 (2 degrees of humeral flexion/abduction to 1 degree of scapular upward rotation).

Is humeral head proximal or distal?

It articulates proximally with the glenoid via the glenohumeral (GH) joint and distally with the radius and ulna at the elbow joint. The most proximal portion of the humerus is the head of the humerus, which forms a ball and socket joint with the glenoid cavity on the scapula.

Where is the humeral head located?

The humerus bone is located in the upper arm, between the shoulder joint and the elbow joint. The shoulder joint, also known as the glenohumeral joint, is a ball and socket joint. The ball is the humeral head, and the socket is the glenoid fossa of the scapula.

What is the humeral neck?

Anatomical terminology The surgical neck of the humerus is a constriction below the tubercles of the greater tubercle and lesser tubercle, and above the deltoid tuberosity, specifically found at the proximal end of the body of the humerus, and distally towards the greater tubercle and lesser tubercle.

Why is it called humerus?

The word “humerus” is derived from Latin: humerus, umerus meaning upper arm, shoulder, and is linguistically related to Gothic ams shoulder and Greek ōmos.

What muscles abduct the humerus?

Muscles: supraspinatus (initiates abduction – first 15 degrees), deltoid (up to 90 degrees), trapezius and serratus anterior (scapular rotation, for abduction beyond 90 degrees). The deltoid muscle abducts the arm, but at 90 degrees the humerus bumps into the acromion.

Is the head of the humerus medial or lateral?

The upper end of the humerus consists of the head. This faces medially, upwards and backwards and is separated from the greater and lesser tuberosities by the anatomical neck. The greater tuberosity is located laterally on the humerus and has anterior and posterior surfaces.