What muscles are involved in the shoulder girdle?
Table of Contents
- 1 What muscles are involved in the shoulder girdle?
- 2 Which muscle performs the movement of the shoulder girdle back?
- 3 What are the major muscles of the shoulder girdle and the arm?
- 4 What muscle is also known as the shoulder cap muscle?
- 5 How many different movements can the shoulder girdle perform?
- 6 What muscles are involved in the elbow joint?
- 7 How do you strengthen your shoulder girdle?
What muscles are involved in the shoulder girdle?
The four rotator cuff muscles include the supraspinatus, infraspinatus, teres minor, and subscapularis. [2][1] Other muscles that form the shoulder girdle include the pectoralis major, pectoralis minor, the deltoids, trapezius, and the serratus anterior.
Which muscle performs the movement of the shoulder girdle back?
The scapula moves, sliding and rotating on the back, in response to muscle contractions that change the orientation and position of the glenoid. One of the major scapular rotators is the trapezius muscle, which originates from the nuchal line of the occipital and the spines of cervical and thoracic vertebrae.
What are actions of the shoulder girdle?
Movements of the shoulder girdle Movements of the scapula include: elevation, depression, protraction, retraction, upward rotation, downward rotation, and tilting.
What are the major muscles of the shoulder girdle and the arm?
Muscles that move the shoulder and arm include the trapezius and serratus anterior. The pectoralis major, latissimus dorsi, deltoid, and rotator cuff muscles connect to the humerus and move the arm.
What muscle is also known as the shoulder cap muscle?
Deltoid muscle
| Deltoid muscle | |
|---|---|
| Origin | the anterior border and upper surface of the lateral third of the clavicle, acromion, spine of the scapula |
| Insertion | deltoid tuberosity of humerus |
| Artery | thoracoacromial artery, anterior and posterior humeral circumflex artery |
| Nerve | Axillary nerve |
Where are the shoulder girdle muscles?
Muscles that position the pectoral girdle are located either on the anterior thorax or on the posterior thorax ([link] and [link]). The anterior muscles include the subclavius, pectoralis minor, and serratus anterior. The posterior muscles include the trapezius, rhomboid major, and rhomboid minor.
How many different movements can the shoulder girdle perform?
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. Furthermore, the shoulder allows for scapular protraction, retraction, elevation, and depression.
What muscles are involved in the elbow joint?
Muscles of the Elbow Joint
- Biceps brachii: upper arm muscle enabling flexion of the arm.
- Triceps brachii: muscle in the back of the upper arm that extends the arm and fixes the elbow during fine movements.
- Brachialis: upper arm muscle beneath the biceps which flexes the elbow towards the body.
What is a 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.
How do you strengthen your shoulder girdle?
To do this exercise:
- Hold a dumbbell in each hand.
- Stand with your feet shoulder-width apart, knees slightly bent.
- Engage your core and bend forward at the waist. Keep your back straight.
- Raise your arms away from your body.
- Slowly return to the starting position and repeat.
- Do 3 sets of 10 repetitions.