Question

action: knee flexion, hip extension, knee rotation
nerve: sciatic
color code the different quadricep muscles in the picture.
did you know...

• a piece of the tendon from semitendinosus is often used in surgery as a graft to create a new acl.
• the short head of the biceps femoris is not officially considered a hamstring since it does not originate on the ischial tuberosity.
• biceps femoris is the only external rotator of the hip compared to 5 muscles that internally rotate.

fill in the blank:
the hamstrings are antagonist muscles that work opposite of the ____________.
an avulsion of the biceps femoris tendon is common in sports. what does this mean? ____________

Explanation:

The hamstrings are antagonist to the quadriceps as they perform opposite - motion functions. An avulsion of the biceps femoris tendon means the tendon is torn away from the bone it is attached to, often due to sudden forceful contraction in sports.

Answer:

The hamstrings are antagonist muscles that work opposite of the quadriceps.
An avulsion of the biceps femoris tendon means the tendon is torn away from the bone.