
The tenderloin, also known as the filet, is a muscle with very little fat running through it. It is the most tender part of the animal, and beef dishes requiring exceptionally tender meat, like steak tartare, are best made from the tenderloin. The three main cuts of the tenderloin are the butt, the center cut, and the tail. The center cut can yield filet mignon, while the tail is generally unsuitable for steaks due to size inconsistency. In humans, the psoas muscle is sometimes referred to as the tenderloin, and it is one of only three muscles that connect the legs to the spine.
| Characteristics | Values |
|---|---|
| Type of muscle | Psoas |
| Location | Groin, where the leg meets the hip or pelvis |
| Number of muscles | One on each side |
| Fat content | None |
| Texture | Tender |
| Taste | Not particularly flavourful |
| Sensitivity | Vulnerable to pain and trauma |
| Connection to other muscles | One of only three muscles that connect the legs to the spine |
| Use cases | Steak tartare, carpaccio, Beef Wellington, Chateaubriand, Tournedos |
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What You'll Learn

The psoas muscle is the human tenderloin
The psoas muscle is considered the human tenderloin. Unlike other muscles in the body, it is a particularly sensitive muscle that is vulnerable to pain and trauma due to its lack of fat. It is one of only three muscles that connect the legs to the spine, and the only one connecting at the front. This muscle is responsible for a range of issues in the body, from back and hip pain to groin pain.
The psoas muscle is unique in its function and structure. Its tenderness, resulting from the absence of fat, makes it susceptible to injury. This muscle plays a crucial role in connecting the legs to the spine, providing structural support and facilitating movement. However, its position in the body also makes it distinct. As the only muscle connecting the legs to the spine from the front, the psoas has a distinct advantage over other muscles.
The psoas muscle is often compared to the filet mignon, a cut of meat known for its tenderness. Just as the filet mignon is valued for its delicate texture, the psoas muscle is essential for maintaining the body's balance and storing unprocessed energy and trauma. Its role in energy storage and the nervous system's maintenance of homeostasis further highlight the psoas muscle's significance.
The psoas muscle's sensitivity and vulnerability to pain present a challenge for individuals experiencing issues in this area. Standard treatments such as physical therapy or surgeries may not always be effective and can sometimes worsen the condition. This underscores the need for specialised approaches to address pain and sensitivity associated with the psoas muscle, the human tenderloin.
Understanding the psoas muscle as the human tenderloin provides valuable insights into managing pain and sensitivity. By recognising the unique characteristics of this muscle, individuals can explore tailored approaches to alleviate discomfort and improve overall well-being. The psoas muscle's comparison to the tenderloin highlights its distinct nature and the need for specific considerations in maintaining optimal physical health.
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It is one of three muscles connecting the legs to the spine
The tenderloin, or psoas, is a muscle found in the human body that is particularly tender due to its lack of fat content. It is one of three muscles that connect the legs to the spine, and the only one that connects in the front. This muscle is unique and important because it is a warehouse for the body's unprocessed energy and trauma. The psoas muscle is also associated with sensitivity to pain and trauma due to its lack of fat, which acts as protection for other muscles.
The psoas muscle is located in the groin area, where the leg meets the hip or pelvis. It is a small muscle, with only about 40% of people having it. The tenderness of the psoas muscle makes it vulnerable to pain and trauma, and it is often associated with back, hip, or groin pain.
As one of the three muscles connecting the legs to the spine, the psoas plays a crucial role in movement and stability. It helps to stabilize the pelvis and maintain balance during movement. The psoas muscle is also involved in flexing the hip and rotating the thigh, which are important for activities such as walking, running, and climbing stairs.
The psoas muscle is a deep core muscle that is essential for maintaining proper posture and spinal alignment. When the psoas is tight or imbalanced, it can contribute to lower back pain and other musculoskeletal issues. Therefore, it is important to keep the psoas muscle flexible and strong through stretching and strengthening exercises.
In summary, the tenderloin or psoas muscle is one of three muscles connecting the legs to the spine. It is a unique and important muscle that plays a crucial role in movement, stability, and posture. The psoas muscle's tenderness and sensitivity to pain and trauma make it a distinct feature of the human body.
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It is the most tender cut of beef
The tenderloin is the most tender cut of beef. This is because the muscle from which it comes does very little work. Whole tenderloins are sold as either "unpeeled" (with the fat and silver skin intact), "peeled" (with the fat removed but the silver skin remaining), or as PSMOs (short for "peeled, side muscle on"). The three main "cuts" of the tenderloin are the butt, the center cut, and the tail.
The butt end is usually used for carpaccio, as the eye can be quite large. Cutting a whole tenderloin into steaks of equal weight will result in very thin steaks from the butt end. The center cut is suitable for portion-controlled steaks, as the diameter of the eye remains relatively consistent. It can also be used to make traditional filet mignon, tenderloin steak, Chateaubriand, and Beef Wellington.
The tail is generally unsuitable for steaks due to size inconsistency, but it can be used for Tournedos, rounds too small to serve as individual filet mignon-sized entrees. These are often cooked with bacon or lard for added richness or used in recipes requiring small pieces of a tender cut.
The tenderloin is also known as the psoas muscle, which is one of only three muscles that connect the legs to the spine and the only one connecting in the front. Its lack of fat content makes it tender but less flavorful than other cuts of meat.
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It is sold as unpeeled, peeled, or PSMOs
Tenderloin is a cut of beef that comes from the loin of beef. It is also known as an eye fillet in Australasia, nautalund in Iceland, filetto in Italy, oxfilé in Sweden, filet in France, filet mignon in Brazil, and fillet in the United Kingdom and South Africa. It is known for being the most tender cut of beef.
Whole tenderloins are sold as either "unpeeled", "peeled", or as PSMOs ("peeled, side muscle on"). An unpeeled tenderloin means that the fat and silver skin are still on the meat. A peeled tenderloin, on the other hand, has the fat removed but still has the silver skin remaining. A PSMO tenderloin, meanwhile, has 100% yield, meaning it is sold as is, with the side muscles (chain and ear), fat, and silver skin connective tissue still present.
The three main cuts of the tenderloin are the butt, the center cut, and the tail. The butt end is usually used for carpaccio or steak tartare, while the center cut is suitable for portion-controlled steaks and can be used for filet mignon, Chateaubriand, Beef Wellington, or steak tartare. The tail, being the most tender part, is considered a byproduct with considerable value to customers.
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The centre cut can be used for Beef Wellington
The tenderloin is a cut of meat that comes from the loin muscle of a cow. It is a long, thin muscle that can be up to 24 inches in length. The tenderloin muscle doesn't get much exercise, which makes it very tender. This cut of meat is also quite lean, with very little fat running through it. As a result, it has a milder flavour than fattier cuts of meat like ribeye.
The centre cut of the tenderloin, also known as the châteaubriand, is particularly well-suited for Beef Wellington. This is because it has a neat, consistent, and cylindrical shape that cooks evenly and looks presentable. Since the beef is the star of the dish, using a centre cut tenderloin ensures that it cooks uniformly and can be easily sliced into equal-sized portions.
The châteaubriand is the middle section of the full tenderloin muscle, which becomes wider towards the back of the animal. This cut is often preferred for Beef Wellington because of its uniform size and shape, making it easier to achieve an even temperature throughout the dish.
When preparing Beef Wellington, it is recommended to sear the beef in a skillet before wrapping it up for the oven. This adds flavour and colour to the meat. Additionally, brushing the surface of the hot tenderloin with Dijon mustard after searing can further enhance its tenderness and flavour.
The tenderloin is considered the ideal cut for Beef Wellington because of its tenderness, flavour, and uniform shape. While it can be expensive, the centre cut tenderloin ensures even cooking and portioning, making it a popular choice for creating a showstopping dish.
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Frequently asked questions
Tenderloin is a cut of beef that comes from the psoas muscle.
The psoas muscle is one of only three muscles that connect the legs to the spine and the only one that connects in the front.
The psoas muscle is unique because it has no fat running through it, making it more vulnerable to pain and trauma.
The psoas muscle is important because it is the body's warehouse for unprocessed energy and trauma, making it the most unique and important muscle in the body.

























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