Logan Steele
The deltoid muscle, also known as the 'common shoulder muscle', is one of the most complex muscle groups in the body. Located where the upper arm meets the torso, the deltoids are made up of three parts: the anterior, middle, and posterior sections. While the deltoids are known as the main shoulder muscle, they are also responsible for other functions of the upper body.
| Characteristics | Values |
|---|---|
| Number of muscles | 3 |
| Neuromuscular segments | 7 |
| Average mass | 192 grams (6.8 oz) |
| Minimum mass | 84 grams (3.0 oz) |
| Maximum mass | 366 grams (12.9 oz) |
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What You'll Learn
- The deltoid muscle is made up of three distinct sets of muscle fibres
- The deltoid is the muscle forming the rounded contour of the human shoulder
- There are seven neuromuscular segments to the deltoid muscle
- The deltoid is also known as the 'common shoulder muscle'
- The deltoid is one of the most complex muscle groups in the body
The deltoid muscle is made up of three distinct sets of muscle fibres
The deltoid muscle is one of the most complex muscle groups in the body. It connects to other muscles and bones in the upper back, neck, chest, and shoulders, and plays a crucial role in keeping the upper body balanced.
The deltoid muscle has seven neuromuscular segments, three of which lie in the anatomical anterior head of the deltoid, one in the anatomical middle head, and three in the anatomical posterior head of the deltoid. These neuromuscular segments are supplied by smaller branches of the axillary nerve, and work in coordination with other muscles of the shoulder girdle, including the pectoralis major and supraspinatus.
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The deltoid is the muscle forming the rounded contour of the human shoulder
The deltoid is one of the most complex muscle groups in the body. It is innervated by the axillary nerve and has seven neuromuscular segments. Three of these lie in the anatomical anterior head, one in the middle head and three in the posterior head.
The deltoid is connected to other muscles and bones in the upper back, neck, chest and shoulders. It plays a crucial role in keeping the upper body balanced.
The deltoid is also further shortened in slang as 'delt'.
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There are seven neuromuscular segments to the deltoid muscle
The deltoid muscle is the muscle that forms the rounded contour of the human shoulder. It is also known as the 'common shoulder muscle' or the 'main shoulder muscle'. The deltoid is one of the most complex muscle groups in the body, made up of three parts: the anterior, middle, and posterior sections.
The deltoid's fibres are pennate muscle. However, electromyography suggests that it consists of at least seven groups that can be independently coordinated by the nervous system. It was previously called the deltoideus (plural deltoidei) and the name is still used by some anatomists.
The deltoid insertion is divided into two or three discernible areas corresponding to the muscle's three areas of origin.
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The deltoid is also known as the 'common shoulder muscle'
The deltoid is also known as the common shoulder muscle. It is the muscle that forms the rounded contour of the human shoulder. It is a complex muscle group, made up of three parts: the anterior, middle, and posterior sections. These sections correspond to the muscle's three areas of origin. The deltoid is further shortened in slang as "delt".
The deltoid is innervated by the axillary nerve, which originates from the anterior rami of the cervical nerves C5 and C6. Studies have shown that there are seven neuromuscular segments to the deltoid muscle. Three of these lie in the anatomical anterior head, one in the middle head, and three in the posterior head. These neuromuscular segments are supplied by smaller branches of the axillary nerve and work in coordination with other muscles of the shoulder girdle, such as the pectoralis major and supraspinatus.
The deltoid muscle is made up of three distinct sets of muscle fibres. These fibres are pennate muscle. However, electromyography suggests that it consists of at least seven groups that can be independently coordinated by the nervous system. The deltoid was previously called the deltoideus (plural deltoidei), a name that is still used by some anatomists. The name comes from the Greek capital letter delta (Δ) because of its shape.
The deltoid is responsible for important actions in the body and plays a crucial role in keeping the upper body balanced. It connects to other muscles and bones in the upper back, neck, chest, and shoulders. A study of 30 shoulders revealed an average mass of 192 grams (6.8 oz) in humans, ranging from 84 grams (3.0 oz) to 366 grams (12.9 oz).
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The deltoid is one of the most complex muscle groups in the body
The deltoid muscle is the muscle that forms the rounded contour of the human shoulder. It is also known as the 'common shoulder muscle' and is made up of three distinct sets of muscle fibres. However, electromyography suggests that it consists of at least seven groups that can be independently coordinated by the nervous system.
The deltoid insertion is traditionally described as a single insertion, but it is actually divided into two or three discernible areas, corresponding to the muscle's three areas of origin. These neuromuscular segments are supplied by smaller branches of the axillary nerve and work in coordination with other muscles of the shoulder girdle, including the pectoralis major and supraspinatus.
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Frequently asked questions
The deltoids are made up of three parts: the anterior, middle and posterior sections. However, there are seven neuromuscular segments to the deltoid muscle.
The deltoids are the common shoulder muscles, forming the rounded contour of the human shoulder. They are also known as the deltoid muscles.
The deltoids are responsible for keeping the upper body balanced. They connect to other muscles and bones in the upper back, neck, chest and shoulders.
