Patella Flashcards Preview

► Med Misc 25 > Patella > Flashcards

Flashcards in Patella Deck (24):
1

Where is the patella located?

At the front of the knee joint, within the patellofemoral groove of the femur

2

Where does the patella attach?

Superiorly to the quadriceps tendon 
Inferiorly to the patallar ligament

3

What is the patella classified as?

A sesamoid type bone

4

Why is the patella classified as a sesamoid type bone?

Due to its position within the quadriceps tendon

5

What shape is the patella?

Triangular

6

Where is the apex of the patella situated?

Inferiorly

7

What is the apex of the patella connected to?

The tibial tuberosity

8

How is the apex of the patella connected to the tibial tuberosity?

By the patella ligament

9

What does the base of the patella form?

The superior aspect of the bone

10

What does the base of the patella provide?

The attachment area for the quadriceps tendon

11

What does the posterior surface of the patella articulate with?

The femur

12

What is the posterior surface of the patella marked by?

Two facets, the medial facet and the lateral facet

13

What does the medial facet of the patella articulate with?

The medial condyle of the femur

14

What does the lateral facet of the patella articulate with?

The lateral condyle of the femur

15

What are the main functions of the patella?

Leg extension 
Protection

16

How is the patella involved in leg extension?

Enhances the leverage that the quadriceps tendon can exert on the femur, increasing the efficiency of the muscle

17

How is the patella involved in protection?

Protects the anterior aspect of the knee joint from physical trauma

18

What happens in patellar dislocation?

The patella bone is displaced out of the patellofemoral groove

19

What % of knee injuries does patellar dislocation account for?

~3%

20

In what manner do most patellar dislocations occur?

Laterally

21

What are patellar dislocations caused by?

A high force impact on the patella or a forceful, sudden twisting of the knee

22

What do patellar fractures usually result from?

Direct trauma to the bone, or sudden contraction of the quadriceps muscle

23

Who are patellar fractures more common in?

Males in the 20-50 age range

24

What happens if the patella fractures into fragments?

They will usually separate- the proximal fragment displace superiorly by the quadriceps tendon, and the distal fragment pulled inferiorly by the patellar ligament