4.4 A&P

Front

What is the function of the semitendinosus muscle?

Back

The semitendinosus muscle is one of the hamstring muscles located at the back of the thigh. Its primary functions are to flex the knee and extend the hip.

Front

Where is the tibialis anterior muscle located and what is its primary function?

Back

The tibialis anterior muscle is located in the front of the lower leg. Its primary function is to dorsiflex the foot and invert the ankle.

Front

What are the primary actions of the gastrocnemius muscle?

Back

The gastrocnemius muscle is located in the calf and is responsible for plantar flexing the foot at the ankle joint and flexing the leg at the knee joint.

Front

What is the role of the soleus muscle in movement?

Back

The soleus muscle is located beneath the gastrocnemius in the calf. Its primary role is to assist in plantar flexion of the foot, especially during walking and running.

Front

What is the anatomical position of the sartorius muscle?

Back

The sartorius muscle is the longest muscle in the human body, running from the anterior superior iliac spine of the pelvis to the medial side of the tibia. It helps in flexing, abducting, and laterally rotating the hip.

Front

What is the difference between the gastrocnemius and soleus muscles?

Back

The gastrocnemius muscle has two heads and is involved in both knee flexion and ankle plantar flexion, while the soleus muscle is primarily responsible for plantar flexion and does not cross the knee joint.

Front

How does the tibialis anterior contribute to balance and stability?

Back

The tibialis anterior helps maintain balance and stability by controlling the position of the foot during walking and running, preventing excessive inversion and providing support during the heel strike.

Front

What movements are facilitated by the hamstring group, including the semitendinosus?

Back

The hamstring group, including the semitendinosus, facilitates knee flexion and hip extension, which are essential for activities like running, jumping, and climbing.

Front

What is the significance of the sartorius muscle in athletic performance?

Back

The sartorius muscle plays a significant role in movements that require hip flexion, abduction, and lateral rotation, making it important for activities like kicking and running.

Front

What are common injuries associated with the gastrocnemius muscle?

Back

Common injuries associated with the gastrocnemius muscle include strains and tears, often occurring during activities that involve sudden acceleration or deceleration.