The subscapularis originates on the anterior scapula and medially rotates the arm. Named for their locations, the supraspinatus (superior to the spine of the scapula) and the infraspinatus (inferior to the spine of the scapula) abduct the arm, and laterally rotate the arm, respectively.
The muscles of internal rotation include:
- of arm/humerus at shoulder. Anterior deltoid muscle. Subscapularis.
- of thigh/femur at hip. Tensor fasciae latae. Gluteus minimus.
- of leg at knee. Popliteus. Semimembranosus.
- of eyeball (motion is also called "intorsion" or incyclotorsion) Superior rectus muscle. Superior oblique muscle.
The clavicular portion of pectoralis major flexes the humerus, while the sternocostal head adducts and medially rotates the humerus.
It attaches to the scapula and the humerus and is one of the seven scapulohumeral muscles. It is a thick but somewhat flattened muscle. The teres major muscle (from Latin teres, meaning "rounded") is positioned above the latissimus dorsi muscle and assists in the extension and medial rotation of the humerus.
The rotator cuff is composed of four muscles: the supraspinatus, infraspinatus, teres minor and subscapularis (Figure 1b). The subscapularis facilitates internal rotation, and the infraspinatus and teres minor muscles assist in external rotation.
The muscles of the knee include the quadriceps, hamstrings, and the muscles of the calf. These muscles work in groups to flex, extend and stabilize the knee joint. These motions of the knee allow the body to perform such important movements as walking, running, kicking, and jumping.
The greater tubercle is located laterally on the humerus and has anterior and posterior surfaces. It serves as an attachment site for three of the rotator cuff muscles – supraspinatus, infraspinatus and teres minor – they attach to superior, middle and inferior facets (respectively) on the greater tubercle.
When your latissimus dorsi is injured, you might feel pain in your low back, mid-to-upper back, along the base of your scapula, or in the back of the shoulder. You may even feel pain along the inside of the arm, all the way down to your fingers.
Training
- Vertical pulling movements such as pull-downs and pull-ups (including chin-ups).
- Horizontal pulling movements such as bent-over row, T-bar row and other rowing exercises.
- Shoulder extension movements with straight arms such as straight-arm lat pulldowns and Pull-overs.
- Deadlift.
For example, a dumbbell row followed by a barbell row and a straight arm pull. Try a variety of moves with different types of equipment to work your muscles in a different way. Go for 2-3 sets of 8-12 reps, resting between sets. Use enough weight or resistance that you can complete the desired number of reps.
It is the primary muscle for humeral medial rotation and assists with adduction. Synergist: Teres major, Latissimus dorsi, and Pectoralis major. Antagonist: Infraspinatus, Teres minor.
The antagonist muscles to this action are the levator scapulae and the trapezius. A minor function of the pectoralis minor is the downward rotation of the scapula when the arms are lowered. The antagonist muscles of this action are the trapezius and the lower fibers of the serratus anterior.
What is the antagonist muscle of the trapezius?
Serratus anterior muscle
Latissimus dorsi muscle
What is the antagonist of the rectus femoris?
This action is strongly assisted by the lowest four digitations of serratus anterior, which are inserted into the inferior angle of the scapula. The antagonists of the trapezius are the rhomboids and levator scapulae, much weaker because gravity assists them.
Bent-Over Dumbbell Row (Uni-Lateral)
This exercise is fantastic for targeting the Teres Major & Minor muscles, make sure you plant your feet either side of a bench and use one hand to rest on it while keeping your back straight and shoulders retracted.Action. Teres Minor, along with Infraspinatus, primarily produces external rotation of the shoulder joint. It assists in adduction and extension of the shoulder. When the humerus is stabilized, abducts the inferior angle of the scapula.
Function. The teres major causes three movements in the shoulder joint; due to its insertion at the anterior side of the humerus, it turns the humerus medially (inward rotation). Furthermore, it pulls the humerus behind (retroversion).
Treatment is conservative, including rest, ice, and anti-inflammatory medications. Physical therapy can help to rebuild strength and range of motion in the shoulder. Any of the rotator cuff muscles, including the teres minor, can tear. Tears can either be acute or chronic.
The teres minor is a slim, narrow muscle within the rotator cuff, located in the shoulder. It is involved in the external rotation of the shoulder joint. It connects the scapula to the humerus, along with the teres major and infraspinatus muscles, which lie on either side and overlap the teres minor.
The supraspinatus tendon is the most frequently torn tendon in the shoulder. Tears to the rotator cuff can be caused by an acute injury such as a fall, lifting or pulling, or lifting too much overhead. Chronic tears are more common and are caused by degenerative changes over the years.
- 1.Lateral raises with palms down or thumbs down. This position may can increase the compression of the rotator cuff muscles against the bony surface in the shoulder.
- Behind the head shoulder press.
- Upright rows.
- Triceps bench dips.
- Single arm rows.
The rotator cuff is a series of 4 muscles in the shoulder that form a cuff of tissue around the humerus bone in the shoulder joint. These muscles provide rotational strength to the shoulder. Tears in the tendons of these muscles are called rotator cuff tears. The most commonly affected muscle is the supraspinatus.
The supraspinatus (plural supraspinati) is a relatively small muscle of the upper back that runs from the supraspinous fossa superior portion of the scapula (shoulder blade) to the greater tubercle of the humerus. It is one of the four rotator cuff muscles and also abducts the arm at the shoulder.
The muscles attached to the humerus are the deltoid, pectoralis major, teres major, latissimus dorsi, infraspinatus, teres minor, biceps brachii, coracobrachialis muscle, brachioradialus, triceps brachii and the anconeus.
Named for their locations, the supraspinatus (superior to the spine of the scapula) and the infraspinatus (inferior to the spine of the scapula) abduct the arm, and laterally rotate the arm, respectively.
In addition to stabilizing the glenohumeral joint and controlling humeral head translation, the rotator cuff muscles also perform multiple functions, including abduction, internal rotation, and external rotation of the shoulder.
Your rotator cuff is made up of muscles and tendons that keep the ball (head) of your upper-arm bone (humerus) in your shoulder socket. It also helps you raise and rotate your arm. Each one of these muscles is part of the rotator cuff and plays an important role: Supraspinatus.
