Popliteus & The Screw Home Mechanism

Question 1

(O) Superior/proximal attachment:
LATERAL CONDYLE OF FEMUR

(I) Inferior/distal attachment:
POSTERIOR PROXIMAL SURFACE OF THE TIBIA, SUPERIOR TO THE SOLEAL LINE

Actions:
VERY WEAK FLEXION OF THE KNEE
MEDIAL ROTATION OF THE KNEE FOR UNLOCKING SCREW HOME MECHANISM

Answer 1

POPLITEUS

Question 2

What is the superior proximal attachment of the popliteus?

Answer 2

LATERAL CONDYLE OF FEMUR

Question 3

What is the inferior distal attachment of the popliteus?

Answer 3

POSTERIOR PROXIMAL SURFACE OF THE TIBIA, SUPERIOR TO THE SOLEAL LINE

Question 4

What is the very weak action popliteus is responsible for?

Answer 4

VERY WEAK FLEXION OF THE KNEE

Question 5

The screw home mechanism is when the knee is fully ___________ and the tibia rotates ____________, locking the knee into a more stable position.

Answer 5

EXTENDED
+
LATERALLY

Question 6

The screw home mechanism locks the _______ into a more stable position.

Answer 6

KNEE

Question 7

How does the screw home mechanism lock the knee into a more stable position?

Answer 7

KNEE EXTENSION
+
TIBIA ROTATES LATERALLY