Leg and Foot

Which best describes I-K on the image of the Tibiofemoral joint?

• I: Fibula

  J: Tibial collateral ligament

  K: Medial meniscus

• I: Popliteus tendon (cut)

  J: Lateral meniscus

  K: Fibula

• I: Tibia

  J: Tibial collateral ligament

  K: Medial meniscus

Which best describes E-G on the image of the Tibiofemoral joint?

• E: Fibula

  F: Tibial collateral ligament

  G: Medial meniscus

• E: Popliteus tendon (cut)

  F: Lateral meniscus

  G: Fibula

• E: Posterior meniscofemoral ligament (cut)

  F: Posterior cruciate ligament (cut)

  G: Medial meniscus

Which best describes A-F on the image of the Talocrural joint?

• A: Posterior tibiofibular ligament

  B: Lateral malleolus

  C: Anterior tibiofibular ligament

  D: Posterior talofibular ligament

  E: Anterior talofibular ligament

  F: Calcaneofibular ligament

• A: Posterior tibiofibular ligament

  B: Tibiocalcaneal ligament

  C: Anterior tibiotalar ligament

  D: Tibionavicular ligament

  E: Navicular

  F: Sustentaculum tali

• A: Fibula

  B: Tibial collateral ligament

  C: Medial meniscus

  D: Fibula

  E: Tibial collateral ligament

  F: Medial meniscus

Which best describes A-D on the image of the Talocrural joint?

• A: Posterior tibiofibular ligament

  B: Lateral malleolus

  C: Anterior tibiofibular ligament

  D: Posterior talofibular ligament

• A: Posterior tibiofibular ligament

  B: Tibiocalcaneal ligament

  C: Anterior tibiotalar ligament

  D: Tibionavicular ligament

• A: Navicular

  B: Tibial collateral ligament

  C: Medial malleolus

  D: Tibial collateral ligament

The strong looking group of medial ligaments compares to the lateral ones in the talocrural joint; therefore, sprains of the deltoid ligament are much more rare compared to the more susceptible lateral ones. When forced eversion occurs the medial malleolus often fractures before or when the deltoid tears.

• True

• False

Which muscles do Inversion (Antagonists on eversion) of the foot and toes (talotarsal, midtarsal, tarsometatarsal, metatarsophalangeal, proximal and distal interphalangeal joints)?

• Gastrocnemius, Soleus, Tibialis posterior, Peroneus longus/brevis, Flexor digitorum longus, Flexor hallucis longus, Plantaris

• Tibialis anterior, Extensor digitorum longus, Extensor hallucis longus

• Tibialis anterior/posterior, Flexor digitorum longus, Flexor hallucis longus, Extensor hallucis longus

• Peroneus longus/brevis, Extensor digitorum longus

Which muscles do eversion (Antagonists on inversion) of the foot and toes (talotarsal, midtarsal, tarsometatarsal, metatarsophalangeal, proximal and distal interphalangeal joints)?

• Gastrocnemius, Soleus, Tibialis posterior, Peroneus longus/brevis, Flexor digitorum longus, Flexor hallucis longus, Plantaris

• Tibialis anterior, Extensor digitorum longus, Extensor hallucis longus

• Tibialis anterior/posterior, Flexor digitorum longus, Flexor hallucis longus, Extensor hallucis longus

• Peroneus longus/brevis, Extensor digitorum longus

What action(s) happen each time you take a step when walking? (consider both feet)

• plantar flexion (foot on ground); slight dorsiflexion (foot taking the next step) to keep toes from dragging

• Inversion and eversion

• Like other joints that flex or extend, the actions occur in the sagittal plane, however dorsi and plantar flexion do not cross into the posterior side of the frontal plane and therefore neither are not considered “extension”. Inversion and eversion look similar to supination and pronation, but lack the rotational quality in the joint structure that is seen in the elbow joint.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

What purpose do the toe flexor and extensor muscles primarily serve?

• plantar flexion (foot on ground); slight dorsiflexion (foot taking the next step) to keep toes from dragging

• Though similar to the same muscles in the arm and hand, they serve primarily as stabilizing muscles for balance as you stand, walk or run.

• Like other joints that flex or extend, the actions occur in the sagittal plane, however dorsi and plantar flexion do not cross into the posterior side of the frontal plane and therefore neither are not considered “extension”. Inversion and eversion look similar to supination and pronation, but lack the rotational quality in the joint structure that is seen in the elbow joint.

Which two muscles form an “anatomical stirrup” on the foot? FLAT

• Gastrocnemius and Soleus

• Tibialis anterior and fibularis longus

• Flexor digitorum longus and Tibialis Anterior