What are the articulations of the pectoral girdle?
What are the articulations of the pectoral girdle?
There are four main joints in the pectoral girdle:
- Sternoclavicular joint. This joint is the point where your clavicle meets your sternum.
- Scapulothoracic joint. Also known as the scapulocostal joint, this is where the scapula bone meets the ribs in the back of your chest.
- Acromioclavicular joint.
- Glenohumeral joint.
What two bones articulate to make up the pectoral girdle?
components. 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 are the three articulations involved in the shoulder girdle?
The shoulder girdle consists of three bones (clavicle, scapula, and humerus) and three joints (sternoclavicular, acromioclavicular, and glenohumeral) as shown in Fig.
What are the points for articulation of pelvic and pectoral girdles?
In pelvic girdle, the point for articulation is the acetabulum. The acetabulum lies at the point of fusion of three component bones of the pelvic girdle. It articulates with the femur. In pectoral girdle, glenoid cavity is the point of articulation.
Which bone does the pectoral girdles not articulate?
THE PECTORAL GIRDLES DO NOT ARTICULATE WITH THE VERTEBRAL COLUMN AND ARE HELD IN POSITION AND STABILIZED BY A GROUP OF LARGE MUSCLES THAT EXTEND FROM THE VERTEBRAL COLUMN AND RIBS TO THE SCAPULA. The shoulder girdle is very light and allows the upper limb to have free movement.
How many joints are in the pectoral girdle?
The bones of the shoulder girdle articulate with each other and partake in the formation of 4 joints that include: The sternoclavicular joint – formed between the sternum and clavicle.
Which bones articulates with the humerus?
The humerus articulates with the scapula proximally at the glenohumeral joint so it participates in the movements of the shoulder. Also, the humerus has distal articulations with the radius and ulna at the elbow joint.
Where does the humerus articulate on the pectoral girdle?
The glenoid cavity, a shallow cavity shaped in the scapula where the humerus articulates with the pectoral girdle, is located inside the lateral angle. When the glenoid cavity’s scapula articulates with the upper limb’s humerus, the glenohumeral joint, or shoulder joint, is shaped.
What is the difference between pectoral 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.
What are shoulder girdles?
The shoulder girdle, consisting of the collar bone (clavicle) and the shoulder blade (scapula) provides the bony link between the arm and the trunk. The three joints of the shoulder girdle are constructed to allow a wide range of arm movement, at the expense of stability.
Does the pectoral girdle articulate with the ribs?
It is surrounded by muscles on both its anterior (deep) and posterior (superficial) sides, and thus does not articulate with the ribs of the thoracic cage.
Which joint is the articulation between the scapula and the humerus?
the Glenohumeral joint
The shoulder joint itself known as the Glenohumeral joint, (is a ball and socket articulation between the head of the humerus and the glenoid cavity of the scapula)
How many articulations does the humerus have?
The distal end of the humerus has two articulation areas, which join the ulna and radius bones of the forearm to form the elbow joint. The more medial of these areas is the trochlea, a spindle- or pulley-shaped region (trochlea = “pulley”), which articulates with the ulna bone.
Which bones articulate with what bones?
Terms in this set (8)
- humerus articulates with. glenoid cavity of scapula.
- scapula articulates with. clavicle at acromion end.
- clavicle articulates with. sternum and manubrium.
- ulna articulates with. humerus and radius.
- radius articulates with. ulna and humerus.
- femur articulates with. hip bone, patella and tibia.
- tibia?
- fibula.
Which of the bones that form the pectoral girdle does not articulate directly with the axial skeleton?
The scapula does not articulate directly with the axial skeleton but is attached to it with muscles. (T/F)? the shoulder joint connects the upper limb to the pectoral girdle is formed by the head of the___, articulating with the ___ of the scapula.
What bones articulate the shoulder?
The shoulder is a ball and socket joint made up of three bones, namely the humerus, scapula, and clavicle. The end of the humerus or upper arm bone forms the ball of the shoulder joint. An irregular shallow cavity in the scapula called the glenoid cavity forms the socket for the head of the humerus to fit in.
What type of joint is the clavicle and scapula articulation?
The AC Joint is formed by the junction of the lateral clavicle and the acromion process of the scapula and is a gliding, or plane style synovial joint. The AC Joint attaches the scapula to the clavicle and serves as the main articulation that suspends the upper extremity from the trunk.
What are the 4 articulations of the elbow?
The elbow is a trochoginglymoid (combination hinge and pivot) joint 4, 5:
- the hinge component (allowing flexion-extension) is formed by the ulnohumeral articulation. forearm flexors at elbow:
- the pivot component (allowing pronation-supination) is formed by the radiohumeral articulation and the proximal radioulnar joint.
What bone articulates with humerus?
What are the articulations?
A joint, also known as an articulation, is a location where two or more bones meet. Most joints contain a single articulation. Each articulation contains the names of two bones (or sockets).
Which bones comprise each pectoral girdle?
Deltoid tuberosity. Raised area on lateral syrface of humerus to which deltoid muscle attaches.
What are 2 bones which make up the pectoral girdle?
The pectoral girdle is made up of two major bones: the clavicle and scapula. Clavicle bone. The clavicle or collarbone is an S-shaped bone situated at the front of your body in a horizontal position.
How many bones does the pectoral girdles have?
How many bones make up the Pectoral Girdle? 4 total. Note about the Pectoral Girdle. The pectoral girdle is not a complete circle, as the scapula are free floating.
Why is the pectoral girdle weaker than the pelvic girdle?
The pectoral girdle is weaker than the pelvic girdle because the pelvic girdle is the primary weight-bearing and locomotion structure for the body… What makes the pelvic girdle more stable than the pectoral girdle? The pelvic girdle allows greater mobility than the pectoral girdle.
