What are Quadriceps?

The quadriceps is the thigh muscles of the human body. It is located in front of the thigh muscles. To make the thighs strong, the development of the quadriceps is the first thing, because the quadriceps is one of the largest and most powerful muscles in the human body.

The quadriceps is the thigh muscles of the human body. It is located in front of the thigh muscles. To make the thighs strong, the development of the quadriceps is the first thing, because the quadriceps is one of the largest and most powerful muscles in the human body.

Chinese name

Quadriceps

Foreign name

quadriceps femoris muscle

Location

Thigh front

Function

Keep your knees stable and walk

Gross quadriceps anatomy

Twenty corpses were fixed with formaldehyde on a total of 40 sides. Expose the quadriceps femoris, observe the nerve entry points of each muscle block, and take the anterior superior iliac spine as a bone marker. Use a vernier caliper to measure the linear distance from the plane of the quadriceps nerve entry point to the superior iliac superior spine. The area from the anterior superior iliac spine to the midpoint of the upper edge of the patella was equally divided into 5 regions to evaluate the area of the quadriceps nerve entry point. Completely remove each muscle block of the quadriceps femoris on both sides (160 in total). Remove the muscle surface fat and fascia, observe the shape of the muscle, the starting point and end point of the muscle bundle, and measure the following muscle architecture index: muscle weight (MW), muscle length (ML), fiber length (fiberlength, FL ), Feather angle (), physiological cross-sectional area (CSA), that is: CSA = [muscle mass (g) × cos] / [fiber length (cm) × muscle density (g / cm3)]. is a plume angle, and muscle density is an assumed value, that is, 1.056 g / cm3. In this study, a standardized sarcomere length of 2.2 m was used to correct the muscle fiber length to eliminate the effect of the angular position of the hip and knee joints on the muscle fiber length when the corpse was fixed for comparison between muscle masses.

Measurement of quadriceps nerve entry point and its clinical significance

The textbook points out that understanding the nerve entry point and the muscle entry form of the muscle can help protect the nerve branch when clinically separating the muscle bundle. In addition, before skeletal muscle transplantation, the supply nerve of the transplanted muscle must be compressed or removed to reduce the metabolism of the denervated muscle and facilitate the survival of the transplanted muscle. It can be seen that determining the nerve entry point is feasible and has clinical significance. Studying the intramuscular nerve branches and determining the nerve entry point of the muscle can provide more detailed anatomical data for clinical surgical muscle transplantation using sub-materials. Each muscle block of the quadriceps femoris has been made into a variety of vascular and neural pedicled myocutaneous flaps widely used in clinical practice. The location of the nerve entry point of human quadriceps has been reported. In this paper, the anterior superior iliac spine, which is easily accessible on the body surface, is used as a bone marker. Muscle point distance. It has been observed that the nerve entry points of the rectus femoris, lateral femoris, medial femoris, and intermediate femoris muscles all enter the muscles in the upper part of their respective muscles, and each level of nerve branch has muscles accompanying the muscles, and its nerve The entrance of the muscle and the blood vessel can be considered the "myocardium" of the respective muscle. The nerve entry points of the four muscle masses of the quadriceps femoris were concentrated in the second anterior femoral area. The nerves of the quadriceps are derived from the branches of the femoral nerve, and the stroke and entrance site are very constant. In clinical application of free transplantation to cut off or squeeze nerves, it can be considered in the second upper area of the anterior thigh.

Characteristics of quadriceps muscle building and its significance

Muscle building is a quantitative determination of strength, speed, and amplitude of each skeletal muscle. Physiological cross-sectional area (CSA) and muscle fiber length (FL) are two of the most important architectural indexes. CSA determines the strength of muscle strength, and FL determines the size of muscle contraction speed. The advantage of the feather muscle is that more muscle fibers can be accommodated in the same volume, which significantly increases the physiological cross-sectional area, thereby significantly enhancing muscle contraction, and relying on changes in the plume angle to increase the amplitude of the whole muscle. This study shows that all four muscles of the quadriceps are plumes, the feathery angle of the rectus femoris is (17.1 ± 2.3) °; the medial femoral muscle is (18.6 ± 2.3) °; and the lateral femoral muscle is (15.5 ± 2.8) ) ° and (10.5 ± 1.6) ° of the intermediate femoral muscle. This form of muscle fiber distribution can increase the strength and amplitude of the quadriceps muscle compared to the form of muscle fiber distribution of the band muscle. Therefore, the results of this study suggest that the quadriceps muscles of the quadriceps muscles are in the front of the thighs. The roles in the muscles are mainly to produce muscle strength, which is essential for the knee extension. If muscle atrophy occurs, it will definitely affect the knee extension. Before clinically performing muscle transplantation, the first thing to consider is whether the muscle strength, speed, and amplitude of the selected donor muscle can be well matched with the in situ muscles. Only in this way can the corresponding functional recovery of the body after muscle transplantation be achieved. Therefore, it is necessary for clinicians to understand the architectural characteristics of orthodontic and donor muscles. LimAY et al. Used triceps brachii long head transplantation to repair the deep flexor and extensor muscles according to the muscle architecture characteristics of the triceps, deep flexor and extensor muscles, and the functional recovery of the hand was good after surgery. According to the characteristics of muscle architecture in China, Chu Xianqiu et al. Used the semitendinosus muscle combined with the long head of the biceps femoris to perform muscle transplantation to reconstruct the knee extension function of the intermediate femoral muscle, and achieved good results. Biceps short head knee flexion function. Therefore, a detailed study of the muscle building features of the quadriceps muscle mass and other related muscles can provide a more sufficient anatomical basis for the quadriceps femoris muscle or partial muscle transplantation in the future.