Humerus

As I closely observed the cadaver, this muscle has two heads; the superficial head arising from the medial epicondyle of the humerus and the deep head arising from the ulna head. These two heads has parallel muscle fibers inserting directly onto the middle of the radius. It is innervated by the median nerve arising from the medial epiconedyle that passes between the two heads pronator…

prime movers and occur during flexors while fixators keep the body stable during movement and maintain posture. For the 100 meter dash, the fixators are the fingers placed on the floor while crouched. The levers are the arm bones and the leg bones (humerus, radius, tibia, femur, etc) while the load is the athletes body. There are multiple points that can be said to be the fulcrum and effort but focusing on the knees and ankles, the movement will involve the athlete’s dominant leg or the push-off…

whilst comparing the similarities and differences between the two injuries. The shoulder joint is actually one of the most ambulatory, meaning, it is a commonly dislocated joint in the body. Shoulder dislocations usually entail the head of the humerus being forcibly removed from its cup-shaped socket in the glenoid fossa. In simple terms, the upper arm bone coming out of the shoulder joint socket. Symptoms of shoulder joint dislocation include: Shoulder swollen and severely bruised Extreme…

The musculoskeletal system provides form, support, stability and it is responsible for the movement of the body. The strong protective skeletal layer protects vital organs. For example rib cage protects the heart, kidneys and lungs from any traumatic injury. Bones provide framework that supports and keeps the body from collapsing. It is the major supporting structure of the body. The bone is classified by their shape or structure as cortical bones are dense and compact and cancellous is spongy.…

Now, imagine you are just a child and your parents are told you have Osteosarcoma. This is a type of cancer that is most commonly found in those between the ages of 10 to 20 years old, and often found in the long bones of the body; thigh, shin, or humerus (“Types of Childhood Cancer” 2015). Keep in mind that the cancer can vary with each child. Osteosarcoma can be detected by a child being in severe pain and the parents taking them to the doctors. The pain a child feels is most commonly found…

To examine the DNA, a gel electrophoresis test needs to be run. The first step of gel electrophoresis is to set the gel, which is made of agarose. Agarose is used to separate DNA molecules, and acrylamide is used to separate proteins. The gel starts off as a liquid, which is poured into a molding tray and after it sets, it will turn into a solid. Next .all of the DNA needs to be collected and copied with a Polymerase Chain Reaction, PCR, which is vital to the success of the gel process because…

What is meant by “agonist and antagonist muscle pairs”? Give an example What is meant by agonist in muscle pairs is that it does the majority of the workload in an exercise and is considered the prime mover (primarily responsible for movement). The antagonist in respect to the agonist counteracts. The antagonist helps allow the agonist to perform a task. An example could be the biceps brachii contracts when doing elbow flexion. While the antagonist would be the triceps brachii relaxing during…

1. Strength balance, muscular strength, and endurance deficits are some of the causative factors given for increased risk of shoulder injury/pain. Arm pain and fatigue has also been identified as a common risk factor regarding shoulder and elbow pain. Adolescent pitchers who have a reported history of shoulder pain also demonstrated significantly less relative supraspinatus and middle trapezius strength as well as an increase in internal rotation strength and a decrease in external rotation…

SUMMARY OF CASE STUDY Bill, a 34 year old male, arrived at the doctor’s office experiencing pain in his right hip. Prior to this, Bill maintains an overall healthy lifestyle which includes exercising and activities such as; swimming, water skiing and scuba diving. Bill reports he has had no trauma to his hip. On this visit an analgesic and muscle relaxant were both prescribed to the patient and he was sent home. After three weeks of no improvement Bill has returned to the doctor’s office and has…

Homologous structures are physical parts that have a similar composition throughout many animals, especially vertebrates. Take the “forearms” of humans, cats, whales and bats for example. Each one has a humerus, radius, ulna, carpals and phalanges, but the structure serves a different purpose for each animal (Evidence of Evolution). Vestigial structures are physical components that are either useless or do not serve the same use as they once did. Vestigial…