The force generated by a contraction can be measured non-invasively using either mechanomyography or phonomyographybe measured in vivo using tendon strain if a prominent tendon is presentor be measured directly using more invasive methods. The strength of any given muscle, in terms of force exerted on the skeleton, depends upon length, shortening speedcross sectional area, pennationsarcomere length, myosin isoforms, and neural activation of motor units.
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Get Access Lateral Abduction of the Arm Essay Sample The action of lifting an arm can seem like a thoughtless movement, however, there is complex and intricate process that goes on within the human body to make that small movement happen. It involves bones, muscles, and nerves to complete this process, but it would not be able to start without a certain subconscious thought beforehand.
Lateral abduction of the arm is defined as raising the humerus, radius, and ulna bones to ninety degrees, parallel to the ground, with the elbow extended, and wrist and fingers locked in place. Lateral Abduction of the ArmExtension of Humeroulnar and Radioulnar Joints The bones involved in this movement are all the bones of the shoulder and arm, all of these bones are connected and without all of them working together they would not be able to complete this movement.
The Pectoral Girdle, which is the basis of the shoulder joint, is connected to the axial skeleton by the sternoclavicular joint. It also holds the clavicle, which is connected to the axial skeleton, the scapula, which stabilizes the shoulder and the humerus together. However, the humerus is also connected to the scapula at the glenohumeral joint, which is a ball and socket joint, and allows the movement of the shoulder.
The humerus is then connected to the humeroulnar and Radiohumeral joints, known as the elbow joint, where the trochlear notch fits into the olecranon fossa of the humerus. Moving farther down the arm, the ulna is connected to the humerus at the humeroulnar joint, and the radius right next to it is connected to the ulna at the proximal radioulnar joint.
The biaxial joint, is the last part of the arm that works in lateral abduction, it is connected to the radius at the distal articular surface. The Intercarpal joints, between the proximal and distal row of carpals, are what help contribute to wrist movement. There are many different muscles that have to work together to make such a simple movement occur, the bones and muscles have to work together for it to be possible.
Each muscle has an origin, insertion, and action. The origin is the anchor point of the muscle on the bone, whenever the origin is contracts, it pulls the muscle.
The insertion point is at the opposite end of the origin, whenever a muscle contracts, the insertion point pulls the bone into place. Lastly the action of a muscle is simply what the muscle does in reference to the body.
To be able to make the glenohumeral joint rotate and move into place, the deltoid, pectoralis major, and latissimuss dorsi are all responsible.
The deltoid is the mover of the humerus during extension, its action is to abduct the arm—its origin is the lateral part of the clavicle and the spine of the scapula.
The pectoralis major medially rotates the arm, its insertion points are the clavicular head of the clavicle, the sternocostal manubrium and sternum, and the six upper costal cartilages. The insertion point for this muscle is the bicipital groove of the humerus and the lip of the deltoid; the sternal and abdominal fibers are what extend to flex the joint of the shoulder.
Lastly the latissimus dorsi is one of the most important, it extends the humerus.
It does this by its insertion point at the bicipital groove on the humerus and its origin, which is located on the lumbar and sacral vertebrae of the spine. The next group of muscles to work together includes the infraspinatus, supraspinatus, the teres major, and the subscapularis.
These muscles form a rotator cuff around the head of the humerus and allow major movements of the joint to occur. To be able to move the radioulnar joint, the triceps brachii and anconeus muscles work closely together, the triceps are a principle extensor with the insertion point on the ulna, and the anconeus assists in the function of the triceps.
Finally, the muscles to move the biaxial joint and the hand work to straighten the wrist and lock it in place, while also extending the phalanges. The extensors of the wrist and fingers come from the lateral epicondyle and upper parts of the bone, which then insert into the metacarpals.
The interosseous membrane of the forearm creates an extensor compartment which contains all the extensors of the deep and superficial layer in the hand. Even though there are a small variety of muscles used, they all must work together in order to complete any action.
The main nerves of the arm to complete this specific reaction are the: Beginning with the most medial of the nerves, the brachial plexus is formed from the anterior rami of the spinal nerves, then splitting into other nerves of the arm.
The axillary nerve runs though the deltoid, teres minor, and head of the triceps brachii, effectively supplying the muscles of the upper arm. The musculocutaneous nerve supplies the anterior arm muscles and also the cutaneous in the forearm.word essay about muscles in the arm.
November 21, word essay about muscles in the arm.
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Below is an essay on "Muscles" from Anti Essays, your source for research papers, essays, and term paper examples. Jordan Dore E.g the shoulder of the opposite arm to the throwing arm is keeping you in as still a standing motion as possible to make it easier to throw the ball.
The muscles and tendons allow a person to lift and rotate their arm, and hold the ball of the humerus firmly in place within the shoulder socket. Injuries can occur to the tendons of the rotator cuff by falls, blunt trauma to the shoulder, repeated actions, and age.
In muscles, it is essential that Isotonic Contraction and the Effect of Load on Skeletal Muscles Essay skeletal muscles We know the muscle team moving the arm is formed at the biceps and triceps.
Biceps can bend the elbow, but by itself can not extend the arm. Biceps contract and triceps relax to flex the elbow. You searched for: hand spinner! Etsy is the home to thousands of handmade, vintage, and one-of-a-kind products and gifts related to your search.
No matter what you’re looking for or where you are in the world, our global marketplace of sellers can help you find unique and affordable options. Let’s get started! The muscles involved are the rotator cuff muscles, quadriceps, hamstrings, and gastrocnemius.
The muscles involved are abdominal muscles, rotator cuff muscles, and pectoralis major. Injuries in tennis are caused from failure warm up and cool down, the use of a specific body part, and a previous injury/5(5).