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Flashcards in Sports OR Day 1 Deck (38)
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1

MPFL origin and insertion

femoral insertion origin is between medial epicondyle and adductor tubercle (Schotte point)
superomedial border of the patella

2

What is the Q angle

angular difference between the quadriceps tendon insertion and patella tendon insertion creates a values axis

3

Angle the patellar tendon creates

Lateral angle

4

Blood supply to patellar tendon

Geniculate arteries

5

MPFL function

primary constraint to lateral patellar instability with knee flexion 0 to 20 degrees

6

Two other restraints to passive lateral subluxation

medial patellomeniscal ligament
medial retinaculum

7

How do you draw the Q angle

ine drawn from the anterior superior iliac spine --> middle of patella --> tibial tuberosity
Normal = 13 degrees in male, 18 in female

8

3 anatomic characteristics that lead to an abnormal Q angle

1. femoral anteversion
2. genu valgum
3. external tibial torsion / pronated feet
anatomical factors

9

What muscle attaches to the MPFL

Vastus medialis

10

What is TT-TG distance
(Tibial tubercle Trochlear Groove

-measures the distance between 2 perpendicular lines from the posterior cortex to the tibial tubercle and the trochlear groove
->20mm usually considered abnormal

11

Indication for MPFL repair

acute first time dislocation with bony fragment

12

What do you do if TT-TG distance >20mm

Fulkerson-type osteotomy (anterior and medial tibial tubercle transfer)

13

Static structures in the PLC

-LCL
-Popliteus tendon
-Popliteofibular ligament
-Lateral capsule
-Variable --> arcuate ligament and fabellofemoral ligament

14

Dynamic structures of PLC

-Biceps femoris (inserts on the posterior aspect of the fibula posterior to LCL)
-Lateral head of the gastroc
-IT tract

15

1st layer of the lateral knee

IT tract, biceps

16

Where does the common peroneal nerve lie

Between layers 1 and 2 of the knee

17

2nd lateral layer of the knee

patellar retinaculum, patellofemoral ligament

18

3rd lateral layer of the knee

superficial: LCL, fabellofibular ligament
deep: arcuate ligament, coronary ligament, popliteus tendon, popliteofibular ligament, capsule
*lateral geniculate runs b/w the superficial and deep

19

How is the posterolateral drawer test performed

performed with the hip flexed 45°, knee flexed 80°, and foot is ER 15°.
Mix of posterior drawer and external rotation

20

Layer 1 of the medial knee

Sartorius and deep fascia

21

Layer 2 of the medial knee

Superficial MCL and posterior oblique ligament

22

Whats b/w layer 1 and layer 2 of the knee

Gracilis and semi T

23

Layer 3 of the medial knee

Deep MCL
Capsule
Coronary ligaments

24

Biceps do what in the shoulder

shoulder flexion, abduction

25

Bicep long head origin

supraglenoid tubercle and superior labrum

26

What stabilizes the bicep tendon in the groove

Transverse humeral ligament

27

Biceps subluxation exam

palpable click with arm abduction and external rotation as tendon subluxates out of groove

28

Displacement of bicep tendon coincides with what

Subsapularis tear

29

Superior GHL anatomy and function

Anterosuperior glenoid rim/labrum to proximal lesser tuberosity
Resists inferior translation and ER in shoulder adduction

30

Middle GHL anatomy and function

Anterosuperior glenoid rim/labrum (inferior to SGHL) just medial to lesser tuberosity
Resists anteroposterior translation in 45% of abduction