Ligament Functions

Question 1

Coracoclavicular (trapezoid & conoid)

Answer 1

Stabilizes acromioclavicular joint limiting medial displacement, protraction & elevation

Question 2

Acromioclavicular

Answer 2

Stabilizes acromioclavicular joint

Question 3

Coracoacromial

Answer 3

Prevents the superior displacement of the humeral head by forming the coracoacromial arch

Question 4

Coracohumeral

Answer 4

Reinforces superoanterior aspects of joint capsule

Question 5

Costoclavicular

Answer 5

Stabilizes sternoclavicular joint, limits elevation of the clavicle

Question 6

Superior transverse scapular

Answer 6

Closes off the suprascapular notch

Question 7

Sup. GH Lig

Answer 7

Restraint against inferior translation in adducted position. Restricts ER in 0 degrees of abduction

Question 8

Mid GH lig

Answer 8

Restraint against ER at 45 degrees of abduction

Question 9

Ant band of Inf GH lig

Answer 9

Primary restraint against ER at 90 degrees of Abduction

Question 10

Ulnar collateral lig

Answer 10

Resists excessive cubital valgus

Question 11

Radial collateral lig

Answer 11

Resists excessive cubical varus

Question 12

Anular Lig

Answer 12

Stabilizes proximal radioulnar joint

Question 13

Transverse carpal lig

Answer 13

Prevents bowstringing of the tendons of the flexor pollicis longus, flexor digitorum superficialis & flexor digitorum profundus muscles

Question 14

Collateral ligaments of the MCP joints

Answer 14

Stabilizes MCP joints

Question 15

Triangular fibrocartilage complex (TFCC)

Answer 15

Stabilize distal radioulnar and ulnocarpal joints, form concavity on the ulnar side of the wrist and transfer compressive force from hand/wrist to the forearm

Question 16

Sacrotuberous lig

Answer 16

Stabilizes SI joint

Question 17

Sacrospinous lig

Answer 17

Stabilizes SI joint

Question 18

Iliofemoral lig

Answer 18

Limits extension of thigh at the hip joint

Question 19

Pubofemoral lig

Answer 19

Limits abduction of the femur

Question 20

Ischiofemoral

Answer 20

Limits extension of the femur

Question 21

Tibial (medial) collateral ligament

Answer 21

Stabilizes the lateral aspect of the joint (prevents adduction of the tibia)

Question 22

Anterior cruciate lig

Answer 22

Prevents posterior displacement of the femur on the tibia and hyperextension of the knee

Question 23

Fibular (lateral) collateral lig

Answer 23

Stabilizes the lateral aspect of the joint (prevents abduction of the tibia)

Question 24

Posterior cruciate lig

Answer 24

Prevents the anterior displacement of the femur on the tibia

Question 25

Menisci

Answer 25

Absorb shock, decrease friction, increase contact area

Question 26

Patellar lig

Answer 26

Resists knee flexion, component of extensor mechanism for knee extension

Question 27

Deltoid (medial) collateral lig

Answer 27

Stabilizes joint and resists forced eversion

Question 28

Lateral ligaments of the ankle

Answer 28

Stabilize joint and resist forced inversion

Question 29

Plantar calcaneonavicular lig (spring lig)

Answer 29

Supports the medial longitudinal arch of the foot