What is pectoral girdle and upper limb?
A pectoral girdle, also referred to as the shoulder girdle, connects your upper limbs to the bones along the axis of your body. You have two pectoral girdles in your body. The pectoral girdle consists of the two bones that make up your shoulder: clavicle, or collarbone. scapula, or shoulder blade.
What is the pectoral girdle?
The pectoral girdle, also known as the shoulder girdle, is the set of bones that connects the arm to the rest of the skeleton. It provides support and stabilization to allow the shoulder to move.
Is a bone that serves as a brace between the sternum and the scapula?
The clavicle (collarbone) is an S-shaped bone located on the anterior side of the shoulder. It is attached on its medial end to the sternum of the thoracic cage, which is part of the axial skeleton. The lateral end of the clavicle articulates (joins) with the scapula just above the shoulder joint.
Is the pectoral girdle part of the upper limb?
The pectoral girdles are to the upper limbs as the pelvic girdle is to the lower limbs; the girdles are the parts of the appendicular skeleton that anchor the appendages to the axial skeleton.
What is the difference between shoulder joint and shoulder girdle?
The shoulder is not a single joint, but a complex arrangement of bones, ligaments, muscles, and tendons that is better called the shoulder girdle. The primary function of the shoulder girdle is to give strength and range of motion to the arm. The shoulder girdle includes three bones—the scapula, clavicle and humerus.
What is the difference between pectoral girdle and pelvic girdle?
Distinguish between pectoral and pelvic girdle….
| 5. The glenoid cavity present in the pectoral girdle is comparatively shallow. | Acetabulum cavity present in the pelvic girdle is comparatively deep. |
| 6. It gives articulation to forelimb bones. | It gives articulation to hindlimb bones. |
Why is the pectoral girdle incomplete?
The pectoral girdle is an incomplete ring because it is open in the back between the… The medial ends of the clavicles areticulate with the what of the sternum? The lateral ends of the clavicles areticulate with the what of the scapulae? This is a bone that serves as a brace between the sternum and the scapula.
What makes up the shoulder girdle?
The shoulder girdle is composed of the clavicle and the scapula, which articulates with the proximal humerus of the upper limb. Four joints are present in the shoulder: the sternoclavicular (SC), acromioclavicular (AC), and scapulothoracic joints, and glenohumeral joint.
Which bones are the pectoral girdle?
The shoulder, or pectoral, girdle is composed of the clavicles (collarbones) and the scapulae (shoulder blades). In humans the clavicles join the sternum (breastbone) medially and the scapulae laterally; the scapulae, however, are joined to the trunk only by muscles.
What movements occur at shoulder girdle?
The shoulder girdle is a gliding joint (with slight rotation) where the clavicle articulates with the scapula, usually moving as a unit. The movements of the shoulder girdle include depression and elevation, upward rotation and downward rotation, as well as abduction and adduction.
What is the function of pectoral girdle and pelvic girdle?
The pectoral girdle stabilizes the upper limbs on the thorax and allows a range of mobility at the shoulder. Malformations impair these functions and distort the appearance of the upper chest and back. The pelvic girdle transfers upper body weight to the lower limbs by articulating with the spine.
Which of the following is a part of pectoral girdle?
Each part of the pectoral girdle consists of a scapula and clavicle. The glenoid cavity is a shallow, pyriform articular surface, which is situated on the lateral angle of the scapula. It articulates with the humerus to shape the shoulder joint. Thus the glenoid cavity is a part of the pectoral girdle.
How many bones are in the pectoral girdle?
The bones that attach each upper limb to the axial skeleton form the pectoral girdle (shoulder girdle). This consists of two bones, the scapula and clavicle ( Figure 8.1.1 ).
Why is the pectoral girdle so mobile?
In addition, the clavicle of each pectoral girdle is anchored to the axial skeleton by a single, highly mobile joint (the sternoclavicular joint). This allows for the extensive mobility of the entire pectoral girdle, which in turn enhances movements of the shoulder and upper limb.
Are the right and left pectoral girdles joined to each other?
The right and left pectoral girdles are not joined to each other, allowing each to operate independently. In addition, the clavicle of each pectoral girdle is anchored to the axial skeleton by a single, highly mobile joint (the sternoclavicular joint).
What are the possible injuries of the pectoral girdle?
Discuss two possible injuries of the pectoral girdle that may occur following a strong blow to the shoulder or a hard fall onto an outstretched hand. The clavicle extends laterally across the anterior shoulder and can be palpated along its entire length.