The quadriceps femoris is a group of muscles located in the front of the thigh. The Latin translation of 'quadriceps' is 'four headed,' as the group…. The palmaris brevis muscle lies just underneath the skin. It is a short muscle on the flat of the hand. The muscle begins at the flexor retinaculum in…. The movement of the upper arm and shoulder is controlled by a group of four muscles that make up the rotator cuff. The largest and strongest muscle in…. The extensor pollicis longus muscle begins at the ulna and the interosseous membrane, a tough fibrous tissue that connects the ulna and the radius in….
The biceps brachii, sometimes known simply as the biceps, is a skeletal muscle that is involved in the movement of the elbow and shoulder. Muscle tissue is found throughout your body and its structure and function can be very diverse. You have three different types of muscle: skeletal, smooth, and cardiac. Skeletal muscle alone accounts for over different muscles.
Your muscles perform many important functions that are critical to your health. Some examples of processes that muscles are involved in include things like movement, digestion, and the beating of your heart. The muscular system is made up of over muscles, and each has a part to play in how our bodies function. In addition to allowing movement, muscles…. Learn about the locations and functions of the largest, smallest, widest, longest, strongest, hardest working, and most unusual muscles in the human….
Muscle mass is a part of your lean body mass. The most accurate methods are…. Strength training is an important part of an exercise routine.
Learn how muscles are made, which foods fuel a strong body, and how to get started. We break down some of the basics surrounding what masculinity is, how it harms men, and what we can do about it.
Ruined orgasms are about control, domination, and power. And with the right partner s , these aspects of kink can all be super sexy.
Autosexual people are mainly sexually attracted to themselves. They typically experience little to no sexual attraction to other people. If any of the deltoid muscles are sprained or injured in any way, this variation can cause the pain, spasming, decreased or altered sensation, or sometimes a lack of blood supply. As mentioned earlier, the deltoid muscle plays a large role in the gross movements of the arm.
Each head of the deltoid muscle also plays a role in the stabilization of the glenohumeral joint which serves to improve the smoothness and overall quality of arm movement. The glenohumeral joint, consisting of the scapula and humerus, relies on upper arm musculature for stabilization and overall maintenance of the joint integrity.
The deltoid is a muscle, with motor function as its sole and primary job. Motor function which the deltoid is responsible for includes shoulder abduction, shoulder flexion, and shoulder extension which allows the shoulder to stay at its resting position while also giving the option of backward movement.
The motions enabled by the deltoid muscle play a large role in the overall use of the arm in daily tasks. The deltoid muscle serves no sensory function, though nerves and arteries which run through it allow for its oxygenation and movement. Therefore, severe injury to the deltoid muscle may indirectly cause injury to the underlying nerves and arteries which run through or are adjacent to the deltoid.
Conditions associated with the deltoid often are related to injury of the deltoid muscle or adjacent muscles with similar functions. Muscles in the upper arm region include the supraspinatus, infraspinatus, teres minor, and subscapularis together known as the rotator cuff. The most common injury to this group of muscles as a whole is a rotator cuff tear. This may place undue mechanical stress on the deltoid muscle, which can cause a muscle sprain if it continues over a long period of time.
More specific to the deltoid muscle is its integration within the entire arm, as this plays a role in surgical approaches. Due to the frontal placement of the anterior head of the deltoid, this muscle is an important consideration when surgeons choose an approach which involves access through the front of the arm. Surgeries such as open capsular reconstructions for frontal shoulder instability, shoulder replacement surgeries, biceps tendon repairs, and rotator cuff repair surgeries all may utilize the deltopectoral approach.
The deltopectoral approach uses fibers and anatomical landmarks from the deltoid and pectoralis major muscles to guide surgical incisions. Both frontal and side approaches to surgery include the splitting of deltoid muscle fibers followed by fibers being sewn back together.
Any of these approaches which include the splitting of the deltoid fibers can result in injury to the deltoid muscle. This may require some rehabilitation to the deltoid muscle along with the typical rehabilitation course specific to the surgical procedure. Due to the placement of the axillary nerve immediately below the deltoid muscle, the nerve supply to the deltoid and other upper arm muscles may also be impacted through surgery or traumatic injuries. This nerve loss can result in a partial or complete loss of motor function to the deltoid muscle, along with the other muscles the axillary nerve supplies.
Motor loss would also be accompanied by loss of sensation to the deltoid muscle, depending on the severity of the nerve loss. The cephalic vein runs adjacent to the deltoid muscle and assists with circulation and fluid management. An injury of any kind to the cephalic vein can result in fluid buildup to the upper arm. If not addressed immediately and properly, fluid buildup can lead to a host of other complications, including skin changes, loss of blood flow, nerve damage, loss of muscle strength, and more.
Rehabilitation of the deltoid muscle looks much the same as rehabilitation of most large muscles of the arm. If someone has surgery on the deltoid muscle or even an injury which requires extensive rehabilitation, treatment of the deltoid will typically follow a specific protocol. This protocol will vary slightly based on the injury which occurred and whether surgery was performed.
Most protocols require an individual to wear a brace which immobilizes the arm for two to three weeks. While the arm is immobilized, an occupational or physical therapist will provide either active or passive motion to the joints below the upper arm. The lateral fibers abduct the arm by pulling the humerus toward the acromion.
Abduction of the arm results in the arm moving away from the body, as in reaching out to the side. Contraction of the posterior fibers extends and laterally rotates the arm by pulling the humerus toward the spine of the scapula. Extension and lateral rotation moves the arm posteriorly, as in reaching backwards or winding up to throw a ball underhand.
By: Tim Taylor.
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