Template:GardnerO'Rahilly1968 table 2

From Embryology
Table 2. Comparative sequential development of human knee joint and that of chick embryo (1968 - Knee)
  (The data relating to Gallus domesticus are from O’Rahilly & Gardiner, 1956.)
Feature Homo stage Gallus stage
Lower limb bud 13 17
Ectodermal thickening and ridge 13-18 18-30
Skeletal chondrification 18 27
Femorofibular proximity 18-19 27
Quadriceps insertion 18-19 27
Tibialis anterior in knee 27
Ambiens in knee 29
Homogeneous interzone 19-20 26
Patellar condensation 19-20 29-30
Intracapsular ligaments, including cruciate and menisci 19-20 30
Embryonic movements c. 20 c. early 30’s
Three-layered interzone 21  ?
Chondrification in patella 21-22 36
Diaphysial bone collars 22-23 28-29
Cavitation 23 34