Muscles of the orbit

The video tutorial discusses the sois minor muscle, a variable muscle in the hip joint, present in only 30-60% of people. It covers the muscle's origin, insertion, and innervation, highlighting its role in stabilizing the pelvis and hip joint. Despite its functions, the sois minor is not crucial for body movement. The video encourages using Kenhub for further anatomy learning.

What percentage of people are missing the sois minor muscle?

• 10 to 20%

• 80 to 90%

• 30 to 50%

• 40 to 70%

Where does the sois minor muscle originate if present?

• From the sacrum

• From the iliac crest

• From the femur

• From the lateral surface of the 12th thoracic and 1st lumbar vertebrae

What is the innervation source for the sois minor muscle?

• Obturator nerve

• Direct branches of the lumbar plexus

• Sciatic nerve

• Femoral nerve

What movement is associated with unilateral contraction of the sois minor muscle?

• Extension of the hip

• Abduction of the leg

• Lateral flexion of the lumbar vertebral column

• Rotation of the pelvis

How does the presence or absence of the sois minor muscle affect the body's function?

• It affects the strength of the hip joint

• It significantly affects balance

• It alters the range of motion in the legs

• It has no significant impact on the body's ability to perform its functions