The movements (actions) of the shoulder girdle consist of:
- Elevation – moving upwards or shrugging your shoulders.
- Depression – moving shoulders downwards.
- Protraction – pushing shoulders forwards, rounding or ‘hunched’ shoulders.
- Retraction – moving shoulders backwards.
How do the shoulder joint&shoulder girdle work together?
• Shoulder joint & shoulder girdle work together in carrying out upper extremity activities • Shoulder girdle movement is not dependent upon the shoulder joint & its muscles © McGraw-Hill Higher Education.
What are the 5 parts of the shoulder girdle?
Shoulder Girdle 1 Clavicle. 2 Scapula. 3 Acromioclavicular Joint. 4 Sternoclavicular Joint (SC Joint). 5 Glenohumeral Joint.
What are the actions of shoulder joint?
ACTIONS OF SHOULDER JOINT. WRITE THE ACTIONS IN THIS ORDER IN ORDER TO GET IT CORRECT. FLEXION, EXTENSION, ABDUCTION, ADDUCTION, HORIZONATL FLEXION, HORIZONTAL EXTENSION, MEDIAL ROTATION, LATERAL ROTATION.
How many movements occur at the shoulder girdle?
Here’s a summary of all 4 movements that occur at the shoulder girdle, alongside the muscle that creates this when contracting concentrically. Notice there are 2 paired actions:
What joint actions 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 joint movements are possible at the shoulder?
The human shoulder is the most mobile joint in the body. This mobility provides the upper extremity with tremendous range of motion such as adduction, abduction, flexion, extension, internal rotation, external rotation, and 360° circumduction in the sagittal plane.
What are the three joints of 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 4 joints of the shoulder?
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.
What are the 5 joints of the shoulder?
Joints[edit | edit source]Glenohumeral Joint,Acromioclavicular Joint.Sternoclavicular Joint.Scapulothoracic Joint.
What is the function of the shoulder girdle?
Your pectoral girdles are responsible for providing structural support to your shoulder region on the left and right side of your body. They also allow for a large range of motion, connecting muscles necessary for shoulder and arm movement. The pectoral girdles on either side of your body aren't joined together.
What type of joint is shoulder joint?
Because the shoulder joint is a ball and socket joint, it has 3 degrees of freedom or motion than a hinge joint like the elbow or knee, which only has 2( flexion/extension). Also, because the shoulder is the most mobile joint in the body, it's the most unstable joint in the body due to the amount of motion it allows.
What are the 8 movements of the shoulder?
Acting in conjunction with the pectoral girdle, the shoulder joint allows for a wide range of motion at the upper limb; flexion, extension, abduction, adduction, external/lateral rotation, internal/medial rotation and circumduction. In fact, it is the most mobile joint of the human body.
Why do you need to know the actions of the shoulder girdle?
2 reasons you need to know about the shoulder girdle actions: Firstly you need to know the four actions of the shoulder girdle to prepare for your L2 or L3 anatomy and physiology exam. You can expect 5-8 questions that relate to joint actions and joint types. This includes knowing the difference between the shoulder girdle and the shoulder joint.
What is shoulder girdle?
The Shoulder girdle is made up of the Scapula (shoulder blades) and Clavicle (collar bone)
What muscles are used to shrug shoulders?
Shrugging the shoulders (scapula elevation) requires the use of levator scapulae and Trapezius. Fixation of the scapula by other muscles, allows the levator scapulae muscles to work together to aid cervical extension, or independently to laterally flex (side bend) the neck towards the side of the working muscle.
What muscles move the clavicle and scapula?
The Shoulder girdle muscles move the clavicle (collar bone) and the scapula (shoulder blade). These generally move together as a unit. The muscles of the shoulder girdle are serratus anterior, pectoralis minor, levator scapulae, rhomboids, and trapezius.
How does the Serratus anterior work?
It works together with Serratus anterior which protracts and rotates the scapula upwards. When the two work together, pure protraction (without rotation) is produced. Daily uses include pushing a door open. Example strengthening exercises – Pec fly using a resistance band and Chest Press using a resistance band.
What muscle is used to fix the scapula?
The Trapezius is one of the shoulder girdle muscles most commonly used to fix the scapula, to allow the Deltoid to move the Humerus. Exercises: Shoulder shrugs with dumbells, reverse fly using a resistance band. This article has been written with reference to the bibliography.
What is a winged scapula?
Winged scapula is an indicator of having a weak Serratus Anterior muscle. Daily uses include reaching up to open a high window. Simple strengthening exercise example – push-up or press up. Origin – Upper nine ribs at the side of the chest and inserts at the costal aspect (side articulating with the ribs) of the medial border of the scapula.
Which part of the muscle is responsible for retraction?
Part 3: The mid-portion of the Trapzius. These fibres are mainly responsible for scapula retraction. Part 4: The lower fibres of Trapezius. This part of the muscle assists in retraction and rotation. When all parts of the muscle work together they have the effect of simultaneously elevating and retracting the scapula.
What is the trapezius muscle?
The trapezius muscle (Trapz) is a large muscle consisting of four parts covering the upper back, shoulders, and neck. It is used in shrugging the shoulders and with overhead movements. Part 1: Upper fibres of the cervical vertebrae. This is the weakest part of the muscle and only provides minor elevation of the clavicle.
What are the bones that make up the shoulder girdle?
You may also see this referred to as the pectoral girdle in some textbooks. The three bones which form the shoulder girdle are the clavicle, scapula, and the humerus.
What is the anatomy of the shoulder?
Shoulder Anatomy. The anatomy of the shoulder consists of the shoulder joint and shoulder girdle. Both work together to produce normal movements. The shoulder is a complex joint with high mobility but a lack of stability. Here we explain the basic anatomy of the shoulder.
What is the acromioclavicular joint?
The Acromioclavicular Joint (ACJ) is formed by the lateral end of the clavicle articulating with the medial aspect of the anterior acromion. The ACJ is important in transmitting forces through the upper limb and shoulder to the axial (central) skeleton.
How many muscles are in the scapula?
It is encased by 17 muscles which provide control and stabilisation against the thoracic wall (the ribcage). This is sometimes referred to as the Scapulothoracic joint, although it is not technically an actual joint. The scapula has a shallow fossa (socket) on its lateral (outside) edge into which the head of the humerus fits.
What is the Glenohumeral joint?
The Glenohumeral joint is a ball and socket joint which provides a large proportion of the movement at the shoulder girdle. The head of the humerus articulates (moves) ...
Which ligaments are involved in the ACJ?
The ACJ has minimal mobility due to its supporting ligaments: Acromioclavicular Ligament which is composed of strong superior (top) and inferior (bottom) ligaments, and weak anterior (front) and posterior (back) ligaments restrict ing anterior-posterior (forwards and backwards) movement of the clavicle on the acromion.
Which muscle is attached to the clavicle?
The clavicle is also an important site for muscle attachments including: Pectoralis Major. Trapezius. Sternocleidomastoid. Sternohyoid. Subclavius. The clavicle meets the scapula at the top of the shoulder where it connects to the acromion process, forming the acromioclavicular joint (AC joint).
What is the shoulder girdle made of?
The Shoulder girdle is made up of the Scapula (shoulder blades) and Clavicle (collar bone) However the Shoulder Joint is the ball and socket joint where the humerus articulates within the glenohumeral socket. This is the joint we are investigating in todays video training.
How many movements are there at the shoulder joint?
All 9 movements that occur at the shoulder joint, with clear actions you can follow along. Three Example Mock Questions to test your knowledge.
What level is shoulder joint?
This is everything you need to know about the shoulder joint and movements for your Level 2 or 3 Anatomy and physiology Exam. The difference between the Shoulder Joint and the Shoulder Girdle. All 9 movements that occur at the shoulder joint, with clear actions you can follow along.
Which joint is the most mobile?
The hip joint is weight bearing and the shoulder joint is not. this makes the shoulder joint the most mobile joint in your body and can move around all three planes of movement: Sagittal, Frontal and Transverse.
What is the structure of the shoulder joint?
Structures of the Shoulder Joint. Articulating Surfaces. The shoulder joint is formed by the articulation of the head of the humerus with the glenoid cavity (or fossa) of the scapula. This gives rise to the alternate name for the shoulder joint – the glenohumeral joint.
What nerve is in the shoulder?
The axillary nerve runs in close proximity to the shoulder joint and around the surgical neck of the humerus, and so it can be damaged in the dislocation or with attempted reduction. Injury to the axillary nerve causes paralysis of the deltoid, and loss of sensation over regimental badge area .
What is the name of the joint that forms the head of the humerus?
The shoulder joint is formed by the articulation of the head of the humerus with the glenoid cavity (or fossa) of the scapula. This gives rise to the alternate name for the shoulder joint – the glenohumeral joint.
What is the glenohumeral joint?
5.2 Rotator Cuff Tendonitis. The shoulder joint (glenohumeral joint) is a ball and socket joint between the scapula and the humerus. It is the major joint connecting the upper limb to the trunk. It is one of the most mobile joints in the human body, at the cost of joint stability.
Which is larger, the humerus or the glenoid fossa?
The head of the humerus is much larger than the glenoid fossa, giving the joint a wide range of movement at the cost of inherent instability. To reduce the disproportion in surfaces, the glenoid fossa is deepened by a fibrocartilage rim, called the glenoid labrum.
What is the most common dislocation at the shoulder?
Clinically, dislocations at the shoulder are described by where the humeral head lies in relation to the glenoid fossa. Anterior dislocations are the most prevalent (95%), although posterior (4%) and inferior (1%) dislocations can sometimes occur. Superior displacement of the humeral head is prevented by the coraco-acromial arch.
What muscles attach to the humerus?
Rotator cuff muscles – surround the shoulder joint, attaching to the tuberosities of the humerus, whilst also fusing with the joint capsule. The resting tone of these muscles act to compress the humeral head into the glenoid cavity.
