During deceleration, there is marked biceps and brachialis activity decelerating the rapidly extending elbow and pronating forearm. The trapezius, rhomboids, and serratus anterior also assist in the deceleration of the shoulder girdle and in the stabilization of the scapula.
What muscle pulls the radius during elbow flexion? what muscle both flexes the elbow and supinates the forearm.


Which muscle is involved in the deceleration of the humerus during throwing?

The teres minor, infraspinatus and posterior deltoid muscles act eccentrically as a restraint to humeral head translation while the serratus and rhomboids aid in scapular stability during deceleration as the arm is extended towards home plate during the follow through.

What muscles decelerate arm throwing?

In addition to teres minor, infraspinatus, supraspinatus and deltoid also present high MVIC to decelerate the arm in space as it moves forward.

What muscle is responsible for moving your humerus up and down?

Other muscles that aid in shoulder movement include: Infraspinatus: This rotator cuff muscle helps with the raising and lowering of the upper arm.

What muscles depress the humerus?

The subscapularis, infraspinatus, and teres minor depress the humeral head, counteracting the upward pull of the deltoid (Inman et al. 1944). The infraspinatus and teres minor are the only cuff muscles that produce external rotation.

What muscles are involved in throwing?

The core muscles of the abdominals and obliques are involved in the balance and weight transfer of the throwing motion. The large muscles of the legs and lower body, such as the calves, quadriceps, hamstrings and glutes, all help to drive and provide power as you step into the throw.

What muscles are involved when throwing a baseball?

It focuses on the latissimus dorsi, abdominal muscles, deltoids, and triceps as the ball is being thrown.

What muscles are active in stabilizing the humerus shoulder during overarm throwing?

The muscles involved are the anterior deltoid, pectoralis major, latissimus dorsi, subscapularis and teres major. Repetitions of this phase can lead to rotator cuff attrition (mainly the supraspinatus and biceps brachii tendons) attributable to impingement taking place under the coracoacromial arch.

Which of the following muscles are responsible for the rapid deceleration braking of the shoulder joint during the follow through of the throwing motion?

Trapezius, rhomboids, and serratus anterior are highly active to decelerate the shoulder girdle and stabilize the scapula. Figure 8. During deceleration, the posterior shoulder musculature must dissipate the forces generated to propel the ball forward.

What are the muscles joints and bones used when throwing a ball?

Analysis of Throwing Most actions are rotational in the transverse plane and longitudinal axis and the two joints primarily involved are the elbow and shoulder. The elbow is a hinge joint formed by the humerus and ulna. The shoulder is a ball and socket joint formed between the humerus and the scapula.

What 6 muscles act on the humerus?

The pectoralis major, latissimus dorsi, deltoid, and rotator cuff muscles connect to the humerus and move the arm. The muscles that move the forearm are located along the humerus, which include the triceps brachii, biceps brachii, brachialis, and brachioradialis.

What muscles abduct the humerus?

Muscles: supraspinatus (initiates abduction – first 15 degrees), deltoid (up to 90 degrees), trapezius and serratus anterior (scapular rotation, for abduction beyond 90 degrees). The deltoid muscle abducts the arm, but at 90 degrees the humerus bumps into the acromion.

Which muscles raise arm above shoulder?

Supraspinatus is responsible for beginning the upward motion of your arm. After about 15 degrees, the deltoid and trapezius muscles do the work.

What is latissimus dorsi muscle?

Introduction. The latissimus dorsi muscle is a broad, flat muscle that occupies the majority of the lower posterior thorax. The muscle’s primary function is of the upper extremity but is also considered to be a respiratory accessory muscle.

What muscles are scapular depressors?

Occasionally some muscular attachments serve as active depressors, the most commonly described being the inferior fibers of serratus anterior and pectoralis minor 1-3. Other minor depressors of the scapula include: latissimus dorsi. pectoralis major (secondarily through its action on the clavicle and humerus)

What is supraspinatus muscle?

The supraspinatus muscle is located on the back of the shoulder, forming part of the rotator cuff. The rotator cuff consists of Supraspinatus, Infraspinatus, Subscapularis and teres minor. The rotator cuff covers the head of the humerus and keeps it into place. These muscles help to lift and rotate the arm.

What muscles are used in a soccer throw in?

Throw-ins are when a player throws the ball over their head — further requiring strong shoulder and arm muscles. Heading the ball requires strong neck muscles. Strengthening these muscles can be done with exercises like pull-ups, pushups, dumbbell lateral raises, biceps curls and triceps extensions.

How many muscles are used to throw a ball?

Simply put, there are about thirty muscles involved in throwing a football. They are the muscles in your rotator cuff (shoulder), your entire arm (biceps, triceps, forearm), also, your trapezius (neck-shoulder) and the latissimus dorsi, and serratus anterior muscles (the muscles over the side of your ribs).

What are four key points involved in throwing the ball baseball style?

There are about five basic steps, more or less, to baseball pitching: Set-up, grip, wind-up, release, and follow-through.

Which of the following are elements of throwing?

Critical Elements for Throwing (Overhand Pattern) Arm back and extended, and elbow at shoulder height or slightly above in preparation for action; elbow leads. Step with opposite foot as throwing arm moves forward. Hip and spine rotate as throwing action is executed. Follow through toward target and across body.

What is the joint movement for throwing a ball?

Throwing is a whole body activity that commences with drive from the large leg muscles and rotation of the hips, and progresses through segmental rotation of trunk and shoulder girdle. It continues with a “Whip-like” transfer of momentum through elbow extension and through the small muscles of the forearm and hand.

What bones do you use when throwing a ball?

The joints you use to properly throw a baseball include those in your fingers and thumb, wrist (radius-ulna and carpals), elbows, shoulders, spine (vertebral arches and bodies), hips, knees (femur, tibia and patella), ankles (tibia-fibula and talus), and feet and toes.

Which muscle is the antagonist during the action of throwing a dart?

Agonist is deltoid, antagonist is the latissimus dorsi. As the muscles contract across the shoulder joint it brings your shoulder upward into flexion as you push the ball the opposite happens and the antagonist becomes your deltoid and the latissimus dorsi becomes your agonist. Gives you the force to push the ball.

How many muscles act on the humerus?

The humerus serves as an attachment to 13 muscles which contribute to the movements of the hand and elbow, and therefore the function of the upper limb.

What muscles originate on the humerus?

The pectoralis major, teres major, and latissimus dorsi insert at the intertubercular groove of the humerus. They work to adduct and medially, or internally, rotate the humerus. The infraspinatus and teres minor insert on the greater tubercle, and work to laterally, or externally, rotate the humerus.

What muscles extend the humerus?

  • Attachments: The long head originates from the scapula, the lateral head from the proximal region of the humerus, and the medial head from the distal region of the humerus. …
  • Action: Extension of the arm at the elbow.
Which muscle acts to abduct and extend the arm at the shoulder?

The deltoid, the thick muscle that creates the rounded lines of the shoulder is the major abductor of the arm, but it also facilitates flexing and medial rotation, as well as extension and lateral rotation. The subscapularis originates on the anterior scapula and medially rotates the arm.

What muscle rotates the humerus laterally?

The teres minor also laterally, or externally, rotate the arm at the shoulder joint. As a lateral rotator, the teres minor is an antagonist muscle to medial rotation; therefore, the teres minor is especially critical in stabilizing the shoulder during medial rotation to prevent anterior dislocation of the humerus.

What muscles are responsible for lateral rotation of the humerus?

  • Supraspinatus is responsible for movement away from the centerline of your body (abduction). …
  • Infraspinatus is the main muscle responsible for lateral rotation of your arm away from the centerline of your body. …
  • Teres minor is a small, narrow muscle on the back of your shoulder blade just below the infraspinatus.
What are the three principal muscles of the shoulders and upper arms?

It consists of three muscle heads: the anterior deltoid, lateral deltoid, and posterior deltoid. All assist with arm elevation during a process called glenohumeral elevation and play a large role in the movement and overall stability of the shoulder joint and upper arm.

What muscles and tendons are in the shoulder?

The rotator cuff connects the humerus to the scapula and is made up of the tendons of four muscles, the supraspinatus, infraspinatus, teres minor and the subscapularis. Tendons attach muscle to bone. Muscles in turn move bones by pulling on the tendons.

What muscle raises the eyebrows?

The frontalis muscle is responsible for elevating the eyebrows, while the corrugator supercilii, orbicularis oculi, and procerus play a role in its depression. The function of the forehead is often spared in middle cerebral artery strokes.

Where are the latissimus dorsi muscles?

The latissimus dorsi is a large, flat muscle covering the width of the middle and lower back. It connects the bone of the upper arm to the spine and the hip.

Is latissimus dorsi a core muscle?

Latissimus Dorsi is often thought of as a shoulder muscle, but it has a major role in trunk movement. Having strong core muscles can prevent low back problems and enhances performance. …

What does the deltoid muscle do?

Your deltoid muscles are in your shoulder, which is the ball-and-socket joint that connects your arm to the trunk of your body. Deltoid muscles help you move your arms in different directions. They also protect and stabilize your shoulder joint. Like most other muscles in your body, the deltoids are skeletal muscles.