The main purpose of the gastrocnemius muscle is to facilitate leg movements, such as jumping, walking, running and knee bending. The gastrocnemius muscle pushes the leg down during these types activities. The location of this muscle is the back of the leg on the calf area.
The pushing action of the gastrocnemius muscle during walking causes a flexing motion of the leg at the ankle (plantar flexion) and knee joints (knee flexion).The gastrocnemius muscle also has two heads that give the muscle its diamond shape. These are the medial and the lateral heads.
Another important muscle in the calf area is the soleus muscle. These two muscles form the calf muscle, and both contribute to plantar flexion and knee flexion. Both these muscles taper and connect to the Achilles tendon that is at the bottom of the lower leg and above the heel area. In the human body, the Achilles tendon is the strongest tendon.
Many different types of injuries can involve the gastrocnemius muscle, including a torn muscle, inflammation of the muscle and a calf muscle rupture. The treatment option depends on the type of injury. For example, a complete rupture of the gastrocnemius muscle is a severe injury that requires between three to four months of recovery time and possible surgery.Learn More
Relaxed sarcomeres contain myosin heads that have released their pull on the thin filaments. This allows them to return back to their relaxed state and causes the I bands and H zones to appear. The myosin heads pull on the thin filaments as a muscle contracts causing the disappearance of the I bands and H zones.Full Answer >
In males, the cremaster muscle raises and lowers the testes to try to keep sperm at the ideal temperature, according to Healthline. When a male enters a cold environment, the cremaster muscle draws the testes in closer to the body. If the testes get too warm, the muscle pushes the organs farther away from the body.Full Answer >
Dips primarily work the triceps, shoulders and chest. The lower trapezius works as a stabilizer. By keeping the upper body straight throughout the dip, the triceps are emphasized. Alternatively, leaning forward during dips places more of an emphasis on the chest.Full Answer >
The function of the carpals is to allow for the easy and free movement of the wrist. There are eight carpal bones: the scaphoid, the capitate, the trapezium, the trapezoid, the lunate, the triquetral, the pisiform and the hamate.Full Answer >