The Thigh | Muscles of the Posterior Compartment [Hamstrings]

The video tutorial provides an in-depth look at the hamstring muscle group, which includes the biceps femoris, semitendinosus, and semimembranosus. It covers their anatomy, functions, and innervation by the sciatic nerve. The tutorial explains the two main functions of these muscles: knee flexion and hip extension. It also discusses the unique aspects of the biceps femoris, including its long and short heads, and their respective roles. Additionally, the video touches on the naming conventions of the muscles and the inclusion of the adductor magnus as a related muscle.

Which nerve is responsible for innervating the hamstring muscle group?

• Obturator nerve

• Sciatic nerve

• Femoral nerve

• Tibial nerve

What is the primary function of the semitendinosus and semimembranosus muscles?

• Hip flexion

• Knee extension

• Knee flexion and hip extension

• Ankle dorsiflexion

Which part of the sciatic nerve innervates the semitendinosus and semimembranosus?

• Common peroneal portion

• Obturator portion

• Tibial portion

• Femoral portion

What is the insertion point for the semimembranosus muscle?

• Greater trochanter of the femur

• Lateral condyle of the femur

• Medial condyle of the tibia

• Head of the fibula

Where does the long head of the biceps femoris originate?

• Ischial tuberosity

• Linea aspera of the femur

• Head of the fibula

• Medial condyle of the tibia

Which part of the biceps femoris is not a two-joint muscle?

• Neither head

• Both heads

• Long head

• Short head

What is the role of the short head of the biceps femoris?

• Hip abduction

• Ankle plantarflexion

• Knee flexion

• Hip extension

Which exercise is commonly used to target hip extension?

• Calf raises

• Squats

• Lunges

• Deadlifts

What characteristic of the semitendinosus tendon gives it its name?

• Its rope-like appearance

• Its broadness

• Its short length

• Its deep location

Which muscle is sometimes grouped with the hamstrings due to its function?

• Adductor longus

• Adductor magnus

• Pectineus

• Gracilis