Bones composing the shoulder girdle. Upper limb 2019-01-24

How Many Bones Are Found in the Shoulder Girdle?

The clavicle has three regions: the medial end, the lateral end, and the shaft. Never had any problem recently in the past 2 months 2018 I am experiencing pain in the right shoulder of the Surgery. Tendons are elastic, soft, connective tissue structures that attach muscles to bone. It is attached on its medial end to the sternum of the thoracic cage, which is part of the axial skeleton. The Clavicles The clavicle is the bone in the shoulder girdle that is often referred to as the collarbone. There are three joints in the shoulder girdle.

How Many Bones Are Found in the Shoulder Girdle?

The , such as the , use a single third toe for weight-bearing and have significantly reduced metacarpals. Forearm bone involved in formation of elbow joint 19, Bones that articulate with the clavice 18. These bones make up the shoulder gi … rdle the scapula shoulder blade and the clavicle collarbone make upthe pectoral girdle. A sports girdle is an article of clothing worn under a uniform that has pockets for pads. There are several important ligaments about the shoulder girdle. The primary purpose of the scapula is to connect the humerus upper arm bone to the clavicle collar bone. The adult skeleton is mainly made of bone and a little cartilage in places.

Bones & Joints of the Shoulder

The head is half-spherical in shape and projects into the glenoid cavity. The sternal end is also anchored to the first rib by the costoclavicular ligament. However, the primary support for the acromioclavicular joint comes from a very strong ligament called the coracoclavicular ligament see. Sex differences in the pelvis are marked and reflect the necessity in the female of providing an adequate canal for a large-headed. The top end of the humerus consists of the head, the neck, the greater and lesser tubercles, and the shaft. I am beginning to fill better still pain. The primary role of the hand itself is grasping and manipulation; tasks for which the hand has been adapted to two main grips — power grip and precision grip.

Bones & Joints of the Shoulder

In addition, the clavicle of each pectoral girdle is anchored to the axial skeleton by a single, highly mobile joint. The flat blade of the scapula glides along the back of the chest allowing for extended movement of the arm. Each bone has a unique shape and name. It is a curved bone that connects the upper extremity arm to the body the trunk , and provides several attachment sites for muscles and ligaments. .

The Pectoral Girdle · Anatomy and Physiology

In addition, there is a space separating the two scapula bones on the backside of the area. Following a strong blow to the lateral shoulder, such as when a hockey player is driven into the boards, a complete dislocation of the acromioclavicular joint can result. The sternoclavicular joint is a synovial joint that has an articular disc and is surrounded by the joint capsule. The head part of the humerus has a half-spherical shape, and the head projects into what is known as the glenoid cavity. This in turn holds the shoulder joint superiorly and laterally from the body trunk, allowing for maximal freedom of motion for the upper limb.

8.1 The Pectoral Girdle

The third corner is occupied by the glenoid cavity. Extending laterally from the spine is a flattened and expanded region called the acromion or acromial process. The small bony bumps located immediately above and below the glenoid cavity are the supraglenoid tubercle and the infraglenoid tubercle, respectively. It is supported by the clavicle, which also articulates with the humerus arm bone to form the shoulder joint. These bones make up the shoulder girdle The shoulder girdle or pectoral girdle consists of the clavicle collar bone and the scapula shoulder blade The Humerus bone of the upper arm fits into a cavity in the scapula called the glenoid cavity. A hard fall may thus cause a fracture of the clavicle broken collarbone or may injure the ligaments of the acromioclavicular joint. This bone is the area for a number of muscle attachments which include the subclavius, sternohyoid, sternoclaedomastoid, trapezius and pectoralis major.

What Bones Make up the Shoulder Girdle?

The bony process at top of shoulder is the acromion process which connects with the spine of the scapula. The ligaments around this joint are relatively weak. In women, the clavicle tends to be shorter, thinner, and less curved. Below the humeral head is the anatomic neck which separates the head ball from the tuberosities. In other words, these arches enable us to walk and run more efficiently. Key Choices E Coronoid fossa K. Alexander that all … movement of the body begins with that muscle point located at the small of the back.

8.1 The Pectoral Girdle

The only recourse you have is to stretch so that your muscles lenthen to allow your skeleton to expand. The only way to experience the composite movement of the shoulder girdle and the pelvic girdle is to 1. This triangular bone has three sides called the medial, lateral, and superior borders. Lower Limb The bones of the lower limb bear the body's weight and are larger and stronger that those of the upper limb. Extending laterally from the spine is a flattened and expanded region called the acromion or acromial process. The neck lies between the head and the greater and lesser tubercles. The bicipital tendon runs through this canal.

Bones composing the shoulder girdle

Despite the adult process of ossification of the hip bones, these bones are still considered 3 various bones. The scapula is a flat, triangular-shaped bone with a prominent ridge running across its posterior surface. Most importantly, the relatively strong thenar muscles of the thumb and the thumb's flexible first joint allow the special opposition movement that brings the distal thumb pad in direct contact with the distal pads of the other four digits. Keeping the head of the humerus inside the glenoid fossa is the primary function of the rotator cuff muscles. The clavicle has several important functions. Pectoral Shoulder Girdle The pectoral girdle consists of two bones: Clavicle The clavicle is also known as the collarbone. When injured, the ligament that attaches the clavicle to the acromion—the acromioclavicular ligament—is called a separated shoulder.