Osteology of the Foot - Accessory Bones Flashcards

1
Q

accessory bone

A

do not appear as part of the normal osteology of the foot

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2
Q

are accessory bones the result of a pathological condition or fracture

A

no

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3
Q

types of accessory bones

A

ossicles

sesamoids

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4
Q

ossicles

A

are the result of anomalous development or anomalous ossification patterns

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5
Q

sesamoids

A

are found in tendons and joint capsules and usually present to reduce the friction of a tendon or later the pull of a tendon

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6
Q

os trigonum (talus secondarius or talus accessorius)

A

located posterior to the lateral tubercle on the posterior surface of the body of the talus

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7
Q

sometimes os trigonum may fuse forming

A

a Stieda’s process

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8
Q

Shepard’s fracture

A

is a fracture of the lateral tubercle

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9
Q

os tibiale externun

A

located just posterior to the tuberosity of the navicular

sometimes may fuse

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10
Q

some clinicians call os tibiale externum a

A

prehallux

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11
Q

os intermetatarseum

A
  • commonly located btwn the 1st and 2nd MT base on the dorsal aspect
  • may also be found btwn the 4th and 5th MT base
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12
Q

os supranaviculare (os talonavicular dorsale)

A

located on the dorsal aspect of the talonavicular joint

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13
Q

os calcaneum secundum (os calcaneus secondarius)

A

commonly located on the dorsal aspect of the calcaneocuboid joint but may be found on the plantar aspect

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14
Q

os supratalare (talus secondarius)

A

located at the proximal aspect on the dorsal surface of the neck of the talus

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15
Q

os vesalianum

A

located posterior to the tuberosity of the base of the 5th NT

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16
Q

accessory ossicle of hallux

A

located on the medial or lateral aspect of the base of the distal phalanx (dorsal surface)

17
Q

os subtibiale

A

located just inferior to the anterior colliculus of the medial malleolus

18
Q

os subfibulare

A

located just inferior to tip of lateral malleolus

19
Q

os sustentaculi

A

located near the sustentaculum tali of the calcaneus (plantar surface)

20
Q

os calcaneum secundum (os calcaneus secondarius)

A

commonly located on the dorsal aspect of calcaneocuboid joint but may be found on the plantar aspect

21
Q

os peroneum

A

located in the tendon of fibularis longus near the fibular notch (dorsum surface)

22
Q

os interphalangeus (IPJ sesamoid of the hallux)

A

located in the IPJ joint capsule of the hallux on the plantar aspect