The humerus bone is the largest in the entire upper body. The upper and lower arms are joined by the bottom of the humerus bone, which also connects the caps of the radius and ulna. On the scapula or shoulder blade, the head of the humerus attaches to a region known as the glenoid fossa.
The intersection of these bones enables movement at the elbow and the extensive range of motion accessible at the shoulder joint.
Table of Contents
Meaning and Location of Humerus Bone
The humerus is the Latin term for ‘upper arm’ in English. Located in the upper arm, the humerus is a long bone. It is one of the longest bones in the human body, making it more vulnerable to fracture from an accident.
The humerus bone is situated in the upper arm, between the elbow and shoulder joints. The shoulder joint is a ball and socket joint, also referred to as the glenohumeral joint. The humeral head serves as the ball, and the glenoid fossa of the scapula serves as the socket.
The Function of Humerus Bone
The ball-and-socket shoulder joint is partially composed of the humerus head. This region also supports the insertion point for muscles comprising the shoulder girdle. The rotator cuff muscles, also known as the supraspinatus, teres minor, infraspinatus, and subscapularis, are all included in this.
Together with these muscles, the humerus bone raises and lowers the upper arm in the lateral and forward directions (also known as extension and flexion) and moves the arm in large and small circular motions (also known as circumduction). Moreover, the humerus bone rotates the arm outward or inward (also known as external and internal rotation).
Additionally, several ligaments in this region help to secure the muscles and give the shoulder joint mobility.
The humerus bone has several arteries and veins running along it. The majority of the humerus bone is covered by the brachial artery, the main blood supply of the upper arm. It also serves as a pathway for brachial plexus nerves. This offers sensation and movement to each muscle in the arm and parts of the spinal cord and neck.
Related Links:
Main Page: BYJU’S NEET
Comments