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The humerus bone of the upper arm (the arm in anatomy refers only to the top part of the upper limb i.e. between the elbow and the shoulder). Like all bones it gives shape to the body and acts as an attachment site for the muscles around it.
Most of the muscles that actually move the humerus are within the region called the thorax or torso. The humerus joins the thorax at the glenohumeral joint (the shoulder joint) which is a synovial joint, or freely moving joint. It is actually designeda as a ball-and-socket type of joint. At this joint there are many movements that can occur: Flexion (the arm is brought up forwards so the elbow is at shoulder height), extenstion (the reverse of flexion, so the arm is pushed backwards behing the body), Abduction (the arm is lifted up and out from the side, like flapping it); adduction (the arm is lowered back into the side of the body, like unflapping it), if all four of these are combined you get circumduction (swinging your arms around in circles, forming a cone shape); rotation (when the shoulder is turned forwards or backwards).
The muscles that are found on and around the humerus are mostly for acting on the forearm, i.e. at the elbow joint. This joint is a synnovial hinge joint and as such only two movements occur here: Flexion (bending the elbow) and Extension (straightening it).
Their biceps brachi (or biceps) muscle is also found around the humerus but it is not really very involved in flexion of the elbow as many would believe. It is in fact used for supination of the forearm bone, the radialis, which means it turns the radius over the ulna. When they lie parallel next to each other, this is when the palm is facing forwards. Only when the forearm is fully supinated can the biceps act to flex the elbow joint. Otherwise the braachialis, a synergist to the biceps, does most of the work.
What else can I help you with?
What is the bone in the upper arm?
The humerus. Edit: Its the humerus its easy to remember because of the phrase "funny bone" funny=humorous=humerus
What bone is the largest and longest of the upper limb bones?
The humerus is the largest and longest bone of the upper limb. It extends from the shoulder to the elbow and plays a key role in the function of the arm.
What muscle originates on the anterior surface of the scapula and inserts on the proximal anterior humerus?
The muscle you are referring to is the subscapularis muscle. It originates on the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus. It is responsible for medial rotation of the shoulder joint.
The upper arm contains a single bone called the?
The Humerus.
The anatomical neck of the humerus includes?
The anatomical neck of the humerus is a constriction just below the head of the humerus bone where it joins the greater and lesser tubercles. It serves as the attachment site for the joint capsule and the ligaments that stabilize the shoulder joint. While it is an anatomical landmark, it does not have a direct function in terms of movement or muscle attachment.
What is the bone in the upper arm?
The humerus. Edit: Its the humerus its easy to remember because of the phrase "funny bone" funny=humorous=humerus
What is the function of humerus in horse?
A horse's humerus is essential to determining how the horse's front end will move. A longer, more vertical humerus is preferable as it allows for better jumping and a better gait.
What bone is the largest and longest of the upper limb bones?
The humerus is the largest and longest bone of the upper limb. It extends from the shoulder to the elbow and plays a key role in the function of the arm.
Function of coracobrachialis?
This muscle flexes and adducts the humerus. It is also a synergist of the pectoralis major
What muscle originates on the anterior surface of the scapula and inserts on the proximal anterior humerus?
The muscle you are referring to is the subscapularis muscle. It originates on the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus. It is responsible for medial rotation of the shoulder joint.
What is the name of the single bone in the upper arm?
The humerus. The humerus is a long bone. It can make blood cells. However, the flat, small, and irregular bones can make blood but not as much as the long bones( humerus, femur).
The upper arm contains a single bone called the?
The Humerus.
What arm bone goes from the elbow to the shoulder?
The humerus bone. =)
Where transcondylar distal humerus?
The distal humerus is the end of the humerus nearest the elbow. Transcondylar means across the condyles, or the knobs at the end of the humerus.
What muscle originates on the distal anterior humerus and inserts onto the coronoid process of the ulna to cause arm reflexion?
The brachialis muscle originates on the distal anterior humerus and insert at the coronoid process. The function of the brachialis is flexion at the elbow.
Function of teres major?
The main function of the teres major is its assistance with the movement of the humerus. It helps with the downward and backward movement of this and it also stabilizes the humeral head in the glenoid cavity.
What is the supporting bone of the arm?
The humerus.
