- Popliteus
- Semimembranosus
- Semitendinosus
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In your trunk twist the lumber vertebrae mostly take part. In this the facet joints are used. The orthopedic surgeons use the term, facet joint. The anatomists call it as zygapophyseal joints.
I do not know all the technical terms for the muscles, but the primary muscles used are the shoulders (deltoids, i think?), triceps, biceps, forearms, and legs (hamstring, thigh and calf). The abs are used a little, and the back is used as well.
Active Exhalation a.k.a. Forced Expiration - Accessory muscles are used to assist passive forces Accessory muscles used: INTERNAL RIB CAGE MUSCLES- 1. Internal Intercostals 2. Transversus Thoracis 3. Subcostals EXTERNAL RIB CAGE MUSCLES- 1.Serratus Posterior Inferior 2.Quadratus Lomborum ABDOMINAL MUSCLES- 1. Rectus Abdominis 2. External Oblique 3. Internal Oblique 4. Transversus Abdominis Hope this helps :D
I would say that the rectus abdominis would be the main muscle associated with trunk flexion, but the external and internal obliques also perform trunk flexion.
the hamstring is used for flexing the knee
Quadricep
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The pectoralis major I believe
Knee Rotation:- as extension progresses, shorter, more highly curved lateral condyle exhausts its articular surface andis checked by ACL, whereas larger and less curved medial condyle continues its forwardroll & skids backward, assisted by tightening of PCL;- result is a medial rotation of femur (external tibial rotation) that tightens collateral ligaments, & joint is "screwed home",to use mechanical phraseology;- flexion of extended knee is preceded by lateral rotation of femur (or medial rotation of tibia), usually produced by popliteus;- this rotation relaxes the tension of the collateral ligaments sufficiently to permit flexion;
The muscles used in the leg press exercise are your Quads primarily. Hamstring gets a good work out too.
Several muscles are used. Biceps brachii for elbow flexion, triceps brachii for elbow extension. Trapezius to raise arm. Deltoid abducts the arm. The pectoralis major allows internal rotation, adduction, and flexion of the arm. The pronator quadratus, pronator teres and supinator all arm forearm muscles that move the wrist. The brachioradialis, brachialis and aconeus are also used.
The antagonists would be those muscles that cause knee flexion. Hamstrings (biceps femoris, semimembranosus, semitendonosis) are the primary knee flexors, and would thus be antagonists to knee extension.
Gastrocnemius and Soleus with leg straight, to isolate gastrocnemius bend knee.
A Internal Positive Pressure aid is an artificial aid for breathing used if you have problems with your muscles or lungs.
External and internal obliques Pectoral major Deltoids
The muscles used to straighten the leg are commonly known as the Quadriceps, a group of four muscles on the front of the thigh. This, however, is only the cast when the knee is isolated. If you were to stand up from a squatted position, you would also be using your gluteal muscles as well as your hamstrings to extend the thigh and stabilize the knee, while your quads and inner thigh muscles (the adductor) help to straighten the the knee. You would also be using your calf muscles to straighten the ankle.