Anatomy Lecture - Popliteal Fossa and Leg Region

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Last updated 1:17 AM on 6/15/26
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25 Terms

1
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Tibia

- shaft is vertical

- shin bone

- medial side of leg

<p>- shaft is vertical</p><p>- shin bone</p><p>- medial side of leg</p>
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Fibula

- lateral to tibia

<p>- lateral to tibia</p>
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Tibiofibular syndesmosis

- joint between the tibia and fibular

<p>- joint between the tibia and fibular</p>
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Talus

- no muscular or tendinous attachments

- surface is covered in articular cartilage

<p>- no muscular or tendinous attachments</p><p>- surface is covered in articular cartilage</p>
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Calcaneus

- "heel bone"

- transmits the majority of body weight from talus to calcanues

<p>- "heel bone"</p><p>- transmits the majority of body weight from talus to calcanues</p>
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Cuboid

- most lateral bone

<p>- most lateral bone</p>
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Navicular

- navicular tuberosity

<p>- navicular tuberosity</p>
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Cuneiforms

medial, intermediate, lateral

<p>medial, intermediate, lateral</p>
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Metatarsals

- foot bones

- labeled medial to lateral

- all have a base, shaft, and distal head

<p>- foot bones</p><p>- labeled medial to lateral</p><p>- all have a base, shaft, and distal head</p>
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Popliteal Fossa

- posterior to knee

- diamond shape

- fat filled

- contains neurovascular structures

<p>- posterior to knee</p><p>- diamond shape</p><p>- fat filled</p><p>- contains neurovascular structures</p>
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Borders of Popliteal Fossa

-Superolateral Border: Biceps femoris

-Superomedial Border: Semimembranosus, Semitendinosus (lateral to semimembranosus)

-Inferolateral Border: Lateral head of Gastrocnemius

-Inferomedial Border: Medial head of Gastrocnemius

Posterior Border: Skin, fascia

Anterior Border: Popliteal surface of femur, oblique popliteal ligament, popliteal fascia over popliteus, floor of fossa

<p>-Superolateral Border: Biceps femoris</p><p>-Superomedial Border: Semimembranosus, Semitendinosus (lateral to semimembranosus)</p><p>-Inferolateral Border: Lateral head of Gastrocnemius</p><p>-Inferomedial Border: Medial head of Gastrocnemius</p><p>Posterior Border: Skin, fascia</p><p>Anterior Border: Popliteal surface of femur, oblique popliteal ligament, popliteal fascia over popliteus, floor of fossa</p>
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Popliteal Fossa Nerves

- sciatic nerve splits into tibial and common fibular

<p>- sciatic nerve splits into tibial and common fibular</p>
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Tibial Nerve

- L4-S3

- Medial

- gives branch to medial sural cutaneous

<p>- L4-S3</p><p>- Medial</p><p>- gives branch to medial sural cutaneous</p>
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Common Fibular Nerve

- L4-S2

- Lateral

<p>- L4-S2</p><p>- Lateral</p>
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Popliteal Artery

- begins when femoral AA. passes through adductor hiatus

- ends when division starts of anterior and posterior tibial arteries

- gives rise to genicular arteries

<p>- begins when femoral AA. passes through adductor hiatus</p><p>- ends when division starts of anterior and posterior tibial arteries</p><p>- gives rise to genicular arteries</p>
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genicular arteries

Branches of the Popliteal Artery providing the blood supply to the area about the knee

<p>Branches of the Popliteal Artery providing the blood supply to the area about the knee</p>
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Three Compartments of the Leg

- anterior

- lateral

- posterior

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Anterior Compartment of Leg

- dorsi flexor or extensor compartment

- Retinaculum (fascia wraps tendons tight to bone)

- innervated by deep fibular nerve

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Lateral Compartment of Leg

- Evertor compartment

- smallest compartment

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Posterior Compartment of Leg

- Plantar Flexion

- Largest

- separated by transverse intermuscular septum

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Superior extensor retinaculum

- from fibula to tibia proximal

<p>- from fibula to tibia proximal</p>
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Inferior extensor retinaculum

- Y shaped

- lateral calcaneus to medial malleolus

<p>- Y shaped</p><p>- lateral calcaneus to medial malleolus</p>
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Anterior Tibial AA.

- branch of popliteal AA.

- Becomes dorsalis pedis

<p>- branch of popliteal AA.</p><p>- Becomes dorsalis pedis</p>
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Dorsalis pedis

top of foot

<p>top of foot</p>
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Deep Fibular Nerve

- terminal branch of the common fibular NN.

- accompanied by the tibial AA.

<p>- terminal branch of the common fibular NN.</p><p>- accompanied by the tibial AA.</p>