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The latissimus dorsi, commonly known as the lats, are a pair of large, flat muscles that occupy a significant area of the back, spanning from the lower back to the humerus. The latissimus dorsi muscles are essential for various physical activities and sports that involve the upper body, such as swimming, rowing, and climbing. They play a crucial role in multiple actions, including adduction, extension, and internal rotation of the shoulder joint, and assist in pulling the arms downward. The lats are fan-shaped, allowing them to pull at a range of angles. This muscle group is frequently targeted during strength training and rehabilitation programs due to its size and function.
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What You'll Learn
- The latissimus dorsi is one of the widest muscles in the human body
- The muscle is responsible for extension, adduction, and internal rotation of the shoulder joint
- It is commonly known as 'lats', especially among bodybuilders
- The muscle is a potential source of muscle for breast reconstruction surgery
- The latissimus dorsi plays a crucial role in various physical activities and sports that involve the upper body
The latissimus dorsi is one of the widest muscles in the human body
The latissimus dorsi, commonly known as the "lats", especially among bodybuilders, is one of the widest muscles in the human body. It is a large, flat muscle that covers a substantial area of the torso's posterior, spanning from the lower back to the humerus. Its expansive coverage stretches from left to right across the back, with the upper portion partially hidden by the trapezius muscle in the medial dorsal region.
The latissimus dorsi is responsible for several functions, including extension, adduction, transverse extension (also known as horizontal abduction or horizontal extension), flexion from an extended position, and medial internal rotation of the shoulder joint. It also plays a synergistic role in the extension and lateral flexion of the lumbar spine. The muscle's ability to bypass the scapulothoracic joints and attach directly to the spine gives it a unique influence on the movement of the scapulae, such as their downward rotation during a pull-up.
The latissimus dorsi is innervated by the sixth, seventh, and eighth cervical nerves through the thoracodorsal (long subscapular) nerve. Electromyography suggests that it consists of six groups of muscle fibres that can be independently coordinated by the central nervous system. This coordination allows the muscle to assist in depressing the arm, along with the teres major and pectoralis major.
The latissimus dorsi is an essential muscle for various physical activities and sports that involve the upper body, such as swimming, rowing, and climbing. Its size and function make it a crucial target for strength training and rehabilitation programs. Exercises that engage the latissimus dorsi include pull-ups, lat pulldowns, bent-over rows, and pendlay rows.
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The muscle is responsible for extension, adduction, and internal rotation of the shoulder joint
The latissimus dorsi, commonly known as "lats", especially among bodybuilders, is a large, flat muscle that occupies a substantial area of the torso's posterior. It is one of the widest muscles in the human body, spanning from the lower back to the humerus. Its expansive coverage stretches from left to right across the back, with the upper portion partially hidden by the trapezius muscle in the medial dorsal region.
The latissimus dorsi is responsible for extension, adduction, and internal rotation of the shoulder joint. When the arms are in a fixed overhead position, the latissimus dorsi pulls the trunk upward and forward. It also has a synergistic role in the extension and lateral flexion of the lumbar spine.
The latissimus dorsi is an important muscle for the stabilization and control of the shoulder joint during overhead movements and lifting. It is an essential muscle for various physical activities and sports that involve the upper body, such as swimming, rowing, and climbing.
Compound exercises for the lats typically involve elbow flexion and tend to recruit the biceps brachii, brachialis, and brachioradialis for this function. Some exercises that engage the latissimus dorsi include pull-ups, lat pulldowns, and bent-over rows.
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It is commonly known as 'lats', especially among bodybuilders
The latissimus dorsi, commonly known as "lats", especially among bodybuilders, is a large, flat muscle that covers a substantial area of the back of the torso. The name "latissimus dorsi" comes from Latin and means "broadest of the back". The muscle is fan-shaped and consists of six groups of muscle fibres that can be independently coordinated by the central nervous system. The latissimus dorsi is one of the widest muscles in the human body, spanning from the lower back to the humerus. Its expansive coverage stretches from left to right across the back, with the upper portion partially hidden by the trapezius muscle in the medial dorsal region.
The latissimus dorsi play a crucial role in various upper-body movements, such as adduction, extension, and internal rotation of the shoulder joint. It is also an important muscle for the stabilization and control of the shoulder joint during overhead movements and lifting. When the arms are in a fixed overhead position, the latissimus dorsi pull the trunk upward and forward. Due to its size and function, the latissimus dorsi is a key muscle group to target during strength training and rehabilitation programs.
Compound exercises for the lats typically involve elbow flexion and tend to recruit the biceps brachii, brachialis, and brachioradialis. Some exercises that specifically target the lats include pull-ups, lat pulldowns, and bent-over rows. These exercises can also recruit the trapezius muscles, depending on the line of pull.
The latissimus dorsi is also used in medical procedures such as breast reconstruction surgery after mastectomy or to correct pectoral hypoplastic defects. It can also be used in cardiomyoplasty, where the muscle is wrapped around the heart and electrostimulated to support failing heart function.
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The muscle is a potential source of muscle for breast reconstruction surgery
The latissimus dorsi is a large, flat muscle that covers a substantial area of the back, stretching from the lower back to the humerus. It is one of the widest muscles in the human body and is commonly known as the "lats", especially among bodybuilders. The latissimus dorsi play a crucial role in various physical activities and sports that involve the upper body, such as swimming, rowing, and climbing. It is also important for the stabilization and control of the shoulder joint during overhead movements and lifting.
The latissimus dorsi muscle is a potential source of muscle for breast reconstruction surgery, known as a latissimus dorsi (LD) flap. This procedure involves removing tissue from the back, including the latissimus dorsi muscle, skin, and fat, and moving it to the front of the chest, with the arteries and veins still attached. This type of reconstruction is often performed after a mastectomy or to correct pectoral hypoplastic defects such as Poland's syndrome.
During the surgery, the latissimus dorsi muscle is tunnelled under the skin and moved below the armpit to the front of the body to create a new breast shape. The muscle is removed from its attachment to the lower back while remaining attached to the upper arm to maintain its blood supply. As the latissimus dorsi is responsible for various upper body movements, it is important to perform exercises after surgery to regain full movement.
While the LD flap is a viable option for breast reconstruction, it may not provide enough volume for breast reconstruction without the use of an implant or tissue expander. This is because most women do not have enough fatty tissue on their back to recreate a full breast using only the LD flap. However, the LD flap can also be used after breast conservation surgery to fill in any misshapen areas that may result from the removal of breast tissue.
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The latissimus dorsi plays a crucial role in various physical activities and sports that involve the upper body
The latissimus dorsi, commonly known as the "
The latissimus dorsi is also involved in the extension and flexion of the lumbar spine, and it assists in respiratory functions such as coughing, sneezing, and forceful expiration. This muscle is targeted during strength training and rehabilitation programs to improve performance and prevent injuries. Some exercises that specifically engage the latissimus dorsi include pull-ups, lat pulldowns, and bent-over rows.
Injuries to the latissimus dorsi are relatively rare but can occur in certain sports such as baseball, golf, and swimming. Diagnosis of an injury typically involves visualization of the muscle, movement testing, and MRI scans. Treatment options include rehabilitation exercises, RICE protocol (Rest, Ice, Compression, and Elevation), and NSAID medication for pain and swelling.
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Frequently asked questions
The lat muscles, short for latissimus dorsi, are a pair of large, flat muscles that occupy a substantial area of the torso’s posterior, spanning from the lower back to the humerus.
The latissimus dorsi muscles are located on the back of the torso, stretching from left to right across the back, with the upper portion partially hidden by the trapezius muscle.
The latissimus dorsi muscles play a crucial role in various upper body movements, such as adduction, extension, and internal rotation of the shoulder joint. They are also important for the stabilization and control of the shoulder joint during overhead movements and lifting.
Exercises that target the latissimus dorsi include pull-ups, lat pulldowns, and bent-over rows. These exercises typically involve elbow flexion and tend to recruit the biceps brachii, brachialis, and brachioradialis.
The latissimus dorsi muscles help to move the arms downward and backward, providing support and stability to the shoulder joint during various physical activities and sports that involve the upper body, such as swimming, rowing, and climbing.
