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25 Cards in this Set
- Front
- Back
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Primary center of ossification 1st metatarsal? |
3rd month of fetal development in the SHAFT |
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Primary center of ossification Lesser MTs? |
3-4 months of fetal development in the SHAFT |
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Primary center of ossification Phalanges? |
3-4 months of fetal development in the SHAFT |
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Primary center of ossification Calcaneus? |
5-6 months of fetal development |
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Primary center of ossification Talus? |
6-7 months of fetal development |
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Primary center of ossification Cuboid? |
9 months of fetal development to just after birth |
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Primary center of ossification 3rd cuneiform? |
6 months of age |
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Primary center of ossification 2nd cuneiform? |
1 year of age |
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Primary center of ossification 1st cuneiform? |
1-1.5 years of age |
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Primary center of ossification Navicular? |
2.5-5 years of age |
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Primary center of ossification Sesamoids? |
7-8 years of age |
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Which bone(s) in the foot 'occasionally*' have a secondary center of ossification? Where and when do they occur?
*Occasionally meaning MOST of the ossification happens via the primary center of ossification |
1st MT: head @ ~7-10yoa Lesser MTs: tuberosity of the 5th @ ~7-10yoa Talus: Lateral process on the posterior surface of the body @ ~8-10yoa Navicular: tuberosity @ ~10yoa
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Where and when is the secondary ossifcation center in the 1st MT? |
In the base @ 3yoa |
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Where and when are the secondary ossification centers in the Lesser MTs? |
In the head @ 3yoa |
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When do most of the bones fuse in the foot? |
Late teens early twenties (14-20yoa) |
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What is it called if the lateral process on the posterior surface of the body of the Talus does not fuse? |
Steidas process or os trigonum |
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What bone (when and where) is the first to start ossifying in the lower extremity? |
SHAFT of FEMUR at 2 months of fetal development |
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What is the osseous order in which the secondary ossification centers appear in the femur? |
Distal extremity-->Head-->Greater trochanter-->Lesser trochanter |
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What is the order in which the secondary ossification centers appear in the femur? |
(Distal) 9 mofd-->(Head) 1 yoa-->(Greater) 4 yoa-->(Lesser) 13 yoa |
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When and where do the primary centers of ossification appear in the tibia and fibula? |
Both appear at 6-7 mofd |
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When and where do the secondary centers of ossification center appear in the tibia? |
Proximal extremity: 9 mofd Distal extremity: 1-1.5 yoa |
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When and where do the secondary centers of ossification center appear in the fibula? |
Proximal extremity: 4 yoa Distal extremity: 1-1.5 yoa |
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What is significant about the fusion of the secondary centers of ossification in the femur with respect to their appearance? |
They fuse in the reverse order in which their subsequent centers appeared (i.e., the distal extremity appears first but fuses last) |
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Primary center of ossification Os coxae? |
Ilium, ishium, and pubis 3-4 mofd |
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Primary center of ossification Patella? |
~3 yoa |
