Glenohumeral joint In this essay we will cover the functions and structure of the glenohumeral joint and synovial joint while also looking at what components are used to stabilize the glenohumeral joint. The glenohumeral joint (shoulder joint) is probably the most complex joint in the entire human body. Its shallow joint supplies the humerus with a full range of movement in all axes and planes. This joint offers many joint movements such as; flexion, extension and hyperextension, adduction and abduction, horizontal flexion and horizontal extension, circumduction and rotation. This type of joint is one of six synovial joints called the ball and socket joint.
2a Describe an example of a weight-bearing synovial joint and explain how this joint is well-suited to the function it performs. (Include a description of the type of joint, the movements that the joint allows, and the muscles that facilitate these movements) (2.1) An example of a synovial joint is the knee joint in which it is freely moveable. The knee joint is the largest joint in the body and is a hinge joint which is formed by the condyle of the femur and tibia and the surface which is named the patella. The hinge joint consists of one concave surface and one convex surface where one bone is able to fit into the other bone is has a synovial cavity to reduce friction of the joint during movement. The ends of the bone are covered with smooth articular cartilage; this acts as a sponge and also reduces friction when the joint is moving.
First-class; when the muscle force and resistive force is on different sides of the fulcrum e.g. the head resting on the vertebral column. As the head is raised, the facial portion of the skull is the resistance, the fulcrum is between the atlas and occipital bone, and the effort is the contraction of the muscles of the back. Second-class; when the muscle force and resistive force act on the same side of the fulcrum, with the muscle force acting through the level longer than that through which the resistive force acts - e.g. raising the body
The objective of this case study is to learn more about RCL injuries and describe the recovery process of an athlete with this injury and returns to play. Anatomy: The thumb is the most unique of all the fingers. It contains only two bones in it called phalanges. Despite having one less phalange, the thumb has the most mobility and range of motion. There are three joints of the thumb carpometacarpal, interphalangeal, and metacarpophalangeal.
The distal end of the humerus articulates with the olecranon of the ulna and provides a very stable joint, which only allows for flexion of the arm and no extension. The humerus provides support and structure for the muscles of the upper arm. It is the connection between the scapula joint (shoulder joint) and the radius and ulna joint (elbow joint) and it supports the movement of your arm. It has insertion points for muscles, and it produces blood cells, and minerals like calcium and phosphorous from blood marrow. In terms of structure, the humerus serves as a connection between the scapula and the elbow, where it links to the two lower arm bones.
Turn the wing upside down and bend the joints. Again pull on each muscle and note how the bones move. Locate the nerve and blood vessels along the biceps muscle. Locate where the biceps muscle attaches to the bones. Pull on the muscle again and try to recognize what is happening to the bones.
Brock Perry HPE295 Grier Gatlin Muscle Fibers Our body is composed of many different groups of muscles and each person has a unique composition of muscle tissue in their body. Different types of athletes usually have one predominant type of muscle fiber, that being the kind that suits their sport the best. Each one has it's own characteristics and is suited to a particular type of movement. Another way to classify these fiber types is by their contractile and metabolic properties, thereby dividing them into slow and fast twitch fibers. The first type of fiber we will look at is the type I, or slow twitch fibers.
Introduction Weight training is a common type of strength training for developing the strength and size of skeletal muscles. It uses the force of gravity to oppose the force generated by muscle through concentric or eccentric contraction. Weight training uses a variety of specialized equipment to target specific muscle groups and types of movement. Weight training differs from bodybuilding, Olympic weightlifting, powerlifting, and strongman, which are sports rather than forms of exercise. Weight training, however, is often part of the athlete's training regimen.
Anatomy of Acromioclavicular (AC) Joint The AC joint is one of the four major articulations associated with the shoulder complex. The joint is located on the outer part of the clavicle and is joined to a projection on the top of the scapula. The AC joint helps form the highest part of the shoulder. This joint allows a small amount of movement to occur between the clavicle and the acromion process. The AC joint allows the ability to raise the arm above the head.
Aim: To examine how a force that a muscle can exert, is effected by factors which are raised from the molecular structure of skeletal muscle. This was obtained by recording the maximum weight that biceps muscle can hold at varies joint angles, exploring the relationship between force and velocity during multi-joint and multi-muscle activities and finally by measuring the length-tension relationship from active to passive insufficiency. Methods: Pages 5, 12, 13 and 14 of the revised lab manual handout. Results: Experiment 1: The experiment was conducted with subject’s arm in upright and horizontal positions at different angles. Subject was required to hold varies weights without moving from her initial position.