Where does the deltoid attach?

Asked By: Amantina Salzseiler | Last Updated: 24th January, 2020
Category: medical health bone and joint conditions
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The deltoid is attached by tendons to the skeleton at the clavicle (collarbone), scapula (shoulder blade), and humerus (upper arm bone). The deltoid is widest at the top of the shoulder and narrows to its apex as it travels down the arm.

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Thereof, where does deltoid muscle attach?

The deltoid muscle originates from the lateral part of the clavicle (collarbone), as well as the spine and acromion process of the scapula (shoulder blade). From these points of origin, the muscle then travels down the arm and inserts on the deltoid tuberosity of the humerus (long bone of the upper arm).

Also, what are the actions of the three heads of the deltoid? The anterior deltoid also works in tandem with the subscapularis, pecs and lats to internally (medially) rotate the humerus. The lateral fibers perform basic shoulder abduction when the shoulder is internally rotated, and perform shoulder transverse abduction when the shoulder is externally rotated.

In this regard, where does the deltoid attach to the humerus?

In human anatomy, the deltoid tuberosity is a rough, triangular area on the anterolateral (front-side) surface of the middle of the humerus to which the deltoid muscle attaches.

What muscle attaches to the deltoid tuberosity?

Muscles. Middle and inferior fibres of trapezius muscle, and deltoid muscle, attached to the deltoid tubercle. The deltoid tubercle marks the beginning of attachment of deltoid muscle.

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What does a torn deltoid feel like?

When the deltoid muscle is injured, a person may feel pain or tenderness at the front, side, or back of the shoulder, especially when lifting the arm. In some cases, the deltoid muscle may be torn and cause swelling and bruising. Using the arm may produce slight pain, but the range of movement is often not restricted.

How do you diagnose a deltoid injury?

Symptoms of a Deltoid Contusion
  1. Pain in the muscle after impact.
  2. Pain and difficulty when lifting the arm to the side.
  3. Tender to touch the muscle.
  4. Bruising appears.
  5. There may be some swelling.

How do you treat a torn deltoid muscle?

The first steps after you injure your deltoid are rest, ice, and heat. Icing the muscle right after the injury will help reduce inflammation and pain. If you have a minor injury, 15 minutes on and 15 minutes off a few times throughout the day for 1 to 2 days should be enough.

How do you stretch your deltoid muscle?

Reach one arm across your body, using your other arm or wrist to hold it gently by your upper arm. Slowly begin to pull your arm toward your chest, as far as possible, allowing the stretch to reach deep into the back of your shoulder. Pause, breathing deeply into the stretch. Hold for at least 30 seconds.

What does the lateral deltoid do?


The lateral fibers abduct the arm by pulling the humerus toward the acromion. Abduction of the arm results in the arm moving away from the body, as in reaching out to the side. Contraction of the posterior fibers extends and laterally rotates the arm by pulling the humerus toward the spine of the scapula.

What do you use your deltoid muscles for?

The anterior deltoid attaches at the collarbone and allows you to flex your shoulder joint and rotate the shoulder inward. The middle deltoid and posterior deltoid attach at different parts of your shoulder blade. The middle deltoid attaches to the shoulder blade and allows you abduct your arm.

What does deltoid mean in anatomy?

noun. Anatomy. a large, triangular muscle covering the joint of the shoulder, the action of which raises the arm away from the side of the body.

Is deltoid part of the rotator cuff?

The rotator cuff includes muscles such as the supraspinatus muscle, the infraspinatus muscle, the teres minor muscle and the subscapularis muscle. The upper arm consists of the deltoids, biceps, as well as the triceps.

What is deltoid Ridge?

The roughly triangular area on the anterolateral (front-side) surface of the middle of the humerus is called as the deltoid ridge. The deltoid muscle is attached to the deltoid ridge. Hence a deltoid ridge occurs in the humerus.

What are the three parts of the deltoid?


As mentioned above, the three parts of the deltoid are distinct muscle fibers making up the anterior deltoid, lateral deltoid, and posterior deltoid. Each of these parts is responsible for different types of arm movement.

Is deltoid back or shoulder?

The posterior deltoid actually acts more like a back muscle. It has three main functions. It's the primary horizontal abductor (reverse fly motion) of the shoulder, and it also assists in external rotation and extension of the humerus (upper arm bone).

What joints does the deltoid cross?

What joint do these muscles cross? These muscles originate on the distal third of the clavicle, acromion process and spine of the scapula, and insert into the deltoid tuberosity of the humerus. These muscles cross the shoulder (glenohumeral joint) and assist in motion of the arm.

What cavity is the deltoid in?

The glenoid cavity or glenoid fossa of scapula is a part of the shoulder.

Where is the biceps Brachii located?


The biceps (Latin: musculus biceps brachii, "two-headed muscle of the arm", sometimes abbreviated to biceps brachii) is a large muscle that lies on the front of the upper arm between the shoulder and the elbow.

What is deltoid inhibition?

This situation occurs when the shoulder is internally rotated and the lateral deltoid insertion moves forward - increasing the distance between the muscle's origin and insertion and putting the deltoid in a lengthened state.

Where is the Coronoid process located?

The coronoid process is a triangular eminence projecting forward from the upper and front part of the ulna. Its base is continuous with the body of the bone, and of considerable strength. Its apex is pointed, slightly curved upward, and in flexion of the forearm is received into the coronoid fossa of the humerus.