Hamstring Muscles and Their Functions

The video tutorial explains the anatomy of the hamstrings, distinguishing between true and fake hamstrings. It covers the origin, insertion, innervation, and actions of the semimembranosus, semitendinosus, and biceps femoris muscles. The tutorial also discusses the sciatic nerve's role in innervating these muscles and provides tips for remembering key details. The video concludes with a summary and advice for test preparation.

What is the main criterion that distinguishes true hamstrings from fake ones?

• Their length

• Their color

• Their insertion point

• Their origin point

Where does the semimembranosus muscle originate?

• Fibula

• Tibia

• Femur

• Ischial tuberosity

Which muscle is known for having a long, stringy tendon?

• Semimembranosus

• Semitendinosus

• Biceps femoris

• Gracilis

What is the insertion point of the semitendinosus muscle?

• Medial condyle of the tibia

• Head of the fibula

• Pes anserine

• Lateral condyle of the femur

Which head of the biceps femoris is considered a fake hamstring?

• Long head

• Short head

• Both heads

• Neither head

Where does the short head of the biceps femoris originate?

• Tibia

• Femur

• Ischial tuberosity

• Fibula

Which nerve innervates the true hamstrings?

• Tibial branch of the sciatic nerve

• Obturator nerve

• Femoral nerve

• Fibular branch of the sciatic nerve

Which part of the sciatic nerve innervates the fake hamstring?

• Both branches

• Neither branch

• Fibular branch

• Tibial branch

What is the primary action of the true hamstrings?

• Hip flexion

• Ankle dorsiflexion

• Knee extension

• Hip extension

What action can the fake hamstring perform?

• Knee flexion

• Hip abduction

• Hip extension

• Ankle plantarflexion