knee-foot Flashcards

exam 2

1
Q

muscles

name the muscles involved

A
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2
Q

joints - all the details

A
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3
Q

ligaments

A
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4
Q

ligaments

A
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5
Q
A
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6
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A
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7
Q
A
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8
Q
A
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9
Q
A
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10
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A
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11
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A
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12
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A
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13
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A
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14
Q
A
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15
Q

joints of lower limb: knee

what bones create the ankle joint -talocural

A

tibia, fibula, talus

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16
Q

knee joint

what 3 stabilities is the knee joint made for?

A
  • bony stability
  • muscualr stability
  • ligamentous stability
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17
Q

what are the 3 bones participating in the knee?

A
  • femur
  • tibia
  • patella

only 2 of these are bones technically

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18
Q

how many points of articulation are in the knee? what are they?

A

3 points of articulation
- femur and tibia (medial/lateral) condyles
- femur (patellar surface)
- patella (medial/lateral articular surfaces)

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19
Q

osteology

what shape is the patella?
what kind of bone is the patella?
what is the patella an important insertion point for?

A
  • relatively heart shaped
  • sesamoid bone
  • importatn insertion for ligaments
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20
Q

soft tissue also supports the knee - what 2 types of ligaments?

A
  • intra-articular
  • extra-capsular
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21
Q

what is the primary action of patella?

A

flexion/extension

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22
Q

how many facets of patella? how many are paired? how many are singular?

A

7 facets (relative to action)
- 6 paired facets (medial/lateral)
- 1 unpaired (mostly medial)

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23
Q

Where is the Q angle drawn between?

A

drawn between os coxa (ASIS) and mid patella
tibia (tibial tuberosity) and mid patella

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24
Q

What are the three major joints of the lower limb?

A

Knee, Hip, Ankle (Talocrural)

The knee involves the patella, unlike the upper limb joints.

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25
Q

What bones make up the knee joint?

A

Femur, Tibia, Patella

The points of articulation are medial/lateral femorotibial and femoropatellar.

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26
Q

What is the primary function of the knee joint?

A

Stability and mobility

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27
Q

What types of stability does the knee joint have?

A
  • Bony Stability
  • Muscular Stability
  • Ligamentous Stability
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28
Q

What is the screw-home mechanism in the knee?

A

The knee locks in position as the size of the femoral condyles relative to the tibial plateau causes medial condyle to move further than the lateral condyle during full extension.

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29
Q

What are the primary actions of the knee joint?

A

Flexion & Extension

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30
Q

True or False: The knee joint is classified as a hinge joint.

A

True

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31
Q

What are the two types of ligaments in the knee joint?

A
  • Intra-articular
  • Extra-capsular
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32
Q

What is the role of the anterior cruciate ligament (ACL)?

A

Limits posterior rolling of femoral condyles on tibia during flexion and prevents posterior displacement of femur.

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33
Q

What is the role of the posterior cruciate ligament (PCL)?

A

Limits anterior rolling and prevents anterior displacement of femur and hyperflexion.

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34
Q

What is the Q-angle?

A

Measurement between ASIS to mid-patella & mid-patella to tibial tuberosity.

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35
Q

What is the function of the menisci in the knee?

A

Shock absorption and covering articular surfaces of the tibia.

36
Q

What are the two types of menisci?

A
  • Medial Meniscus
  • Lateral Meniscus
37
Q

What is the role of bursae in the knee?

A

Reduce friction and allow easy movement.

38
Q

Fill in the blank: The lateral collateral ligament (LCL) connects the femur to the _______.

A

Fibula

39
Q

Which ligament is attached to the medial meniscus?

A

Tibial collateral ligament (MCL)

40
Q

What is the primary arterial supply to the knee joint?

A

Genicular branches of the femoral and popliteal arteries.

41
Q

What are the main movements at the talocrural joint?

A
  • Dorsiflexion
  • Plantarflexion
  • Weak inversion/eversion
42
Q

What are the components of the talocrural joint?

A

Distal tibia, distal fibula, superior talus

43
Q

What ligaments reinforce the talocrural joint?

A
  • Lateral ligaments
  • Medial ligaments (Deltoid ligament)
44
Q

What is the purpose of the deltoid ligament?

A

Resist eversion and stabilize the joint.

45
Q

What is the anatomical definition of the subtalar joint?

A

Synovial joint between convex (talus) and concave (calcaneus) articular surfaces.

46
Q

Which muscle helps unlock the extended knee?

A

Popliteus

47
Q

What is the classification of the distal tibiofibular joint?

A

Fibrous joint (syndesmosis)

48
Q

True or False: The medial meniscus is more mobile than the lateral meniscus.

A

False

49
Q

What is the shape of the medial meniscus?

A

C-shaped

50
Q

What is the clinical significance of the Q-angle?

A

Used to determine abnormalities like genu varum and genu valgum.

51
Q

What type of joint is the superior tibiofibular joint?

A

Synovial joint

52
Q

What are the three facets of the subtalar joint?

A
  • Anterior
  • Middle
  • Posterior
53
Q

What is the anatomical classification of the talocalcaneal part of the talocalcaneonavicular joint?

A

Plane joint

This joint allows for inversion and eversion of the foot around a longitudinal (oblique) axis.

54
Q

What movements does the transverse tarsal joint allow?

A

Inversion, eversion, ABDuction, ADDuction

The transverse tarsal joint separates the hindfoot from the midfoot.

55
Q

What are the three facets of the calcaneus?

A

Anterior, middle, posterior

These facets articulate with the talus and contribute to the joint’s function.

56
Q

What ligaments support the capsule of the talocalcaneal joint?

A

Medial, lateral, posterior ligaments, interosseous ligament

The interosseous ligament is located in the tarsal sinus (sinus tarsi).

57
Q

What is the innervation of the talocalcaneal joint?

A

Plantar nn., Deep fibular n.

This innervation reflects the plantar versus dorsal aspects of the foot.

58
Q

What is the arterial supply for the talocalcaneal joint?

A

Posterior tibial & fibular aa.

These arteries provide blood supply to the region.

59
Q

What type of joint is the talonavicular joint?

A

Ball and socket (partial)

This joint allows for gliding and rotary movements.

60
Q

What joints comprise the transverse tarsal joint?

A

Talonavicular joint, Calcaneocuboid joint

These two joints work together as a compound joint.

61
Q

What is the clinical significance of the transverse tarsal joint?

A

Amputation of foot happens along the transverse tarsal joint

This indicates the importance of this joint in surgical procedures.

62
Q

What is the functional classification of the calcaneocuboid joint?

A

Plane joint

It allows for inversion, eversion, and circumduction of the foot.

63
Q

What is the movement associated with the cuneonavicular joint?

A

Little/no movement

This joint connects the cuneiforms and navicular.

64
Q

What type of joint is the metatarsophalangeal (MTP) joint?

A

Condyloid joint

It allows for flexion, extension, abduction, adduction, and circumduction.

65
Q

What is the main movement facilitated by interphalangeal (IP) joints?

A

Flexion, extension of digits

These joints are hinge joints located between the phalanges.

66
Q

What is the arterial supply for the interphalangeal joints?

A

Plantar arch

This supply is crucial for the function of the digits.

67
Q

What is the shared innervation for MTP and IP joints?

A

Digital nn.

This reflects the nerve supply to the toes.

68
Q

What is the unique feature of the intermetatarsal (IM) joint?

A

Little/no movement

This joint connects the metatarsal heads and is classified as a condyloid joint.

69
Q

What is the arterial supply for the tarsometatarsal (TMT) joint?

A

Shared with Intertarsal joints

This reflects the interconnected blood supply of the joints in the foot.

70
Q

innervation

list some innervations of the knee joint

A
71
Q

what ligaments are considered intra-articular

A

cruciate (ACL, PCL)

72
Q

what ligaments are considered extra-capsular

A

patellar, medial/lateral patellar retinacula, collateral ligaments (LCL/FCL, MCL/TCL, plbique, arcuate)

73
Q

what ligament is considered relatively weak and has poor blood supply?

A

anterior cruciate ligament

74
Q

what injury can occur to the PCL that we did not cover in class but is important to familiarize with?

A

dashboard injury

the knee is bend and forcefully hit by an object - such as a dashboard in a car crash

75
Q

the collateral ligaments are tense during what motion? and slack during what motion?

A

tense during knee extension
slack during flexion

76
Q

what muscle is split by the FCL?

A

biceps femoris

fcl = fibular collateral ligament

77
Q

when the medial meniscus is torn what ligament can also get damaged?

A

tibial collateral ligametn (TCL) or medial collateral ligmament (MCL)

78
Q

what ligament strengths the joint capsule of the knee?

A

arcuate popliteal ligament

  • fibula (head, posterior) over tendon of popliteus m. across posterior aspect
79
Q

what is the anterior component of the menisci called?

A

horn

80
Q

what is the clinical use of Q angle?

A

used to determine abnormalities
- genu varum (bowlegged-ness) Q angle is smaller than normal
- genu valgum (knock-kneed). Q-angle is larger than normal

81
Q

what is the Q angle of female? for male?

A

female: closer to 16°
male: closer to 11°

82
Q

genu varum (bowlegged) stresses what ligament?

A

fibular collateral (FCL)

83
Q

genu valgum (knock-kneed) stresses what ligament

A

tibial collateral ligament (TCL)

84
Q

what are the 8 bursae of the knee joint?

A
  • suprapatellar burse
  • popliteus brusa
  • anserine bursa
  • gastrocnemius bursa
  • semimembranosus bura
  • subcutaneous prepatellar bursa
  • subcutaneous infrapatellar bursa
  • deep infrapatellar bursa
85
Q

what is the purpose of the medial ligaments/deltoid ligament?

A

resist eversion
- strong stabilizer of joint, helps minimize dislocation

86
Q

what is the anatomical and clinical definition of the subtalar joint?

A

anatomical: synovial joint between convex (talus) and concave (calcaneus) rticular sufaces

clinical: anatomical joint and talocalcaneal parto f talocalcaneonavicular joint

87
Q

what kind of joint is the tarsometatarsal (TMT)?

A

plane joint gliding