The developing sphenoid bone is considered to be a median cartilage mass(basilar sphenoid bone)with three cartilaginous processes(orbital wing or orbital pterygoid process,temporal wing and nasal pterygoid process).Th...The developing sphenoid bone is considered to be a median cartilage mass(basilar sphenoid bone)with three cartilaginous processes(orbital wing or orbital pterygoid process,temporal wing and nasal pterygoid process).The relationship between this initial morphology and adult morphology is difficult to determine because of extensive membranous ossification along the cartilaginous elements.We examined the sagittal sections of 25 embryos and fetuses aged 6-34 weeks,and compared them with the horizontal and frontal sections of the other 25 late fetuses(217-340 mm).At 7-8 weeks,the optic nerve was sandwiched between bars of the orbitosphenoid.The superior rectus originates from a bar different from the other three recti.展开更多
Cartilaginous fabella appears to be embedded in the plantaris origin(PL)that fuses with the gastrocnemius lateral head(GL)in midterm fetuses.Histological sections of unilateral knee joints of 15 late-stage fetuses,we ...Cartilaginous fabella appears to be embedded in the plantaris origin(PL)that fuses with the gastrocnemius lateral head(GL)in midterm fetuses.Histological sections of unilateral knee joints of 15 late-stage fetuses,we reexamined the topographical anatomy of fabella or its analogue(a tight fibrous mass)with origins of the GL and PL.Irrespective of whether the cartilaginous fabella is present(6/15)or absent,these muscle origins were composed of three parts(PLl,PL2 and PL3;GLl,GL2 and GL3).Fabella or its analogues embedded in a thicker common tendon origin of GL and PL.PL1 was similar to the adult PL,and originated from the femoral condyle immediately above the common tendon.展开更多
文摘The developing sphenoid bone is considered to be a median cartilage mass(basilar sphenoid bone)with three cartilaginous processes(orbital wing or orbital pterygoid process,temporal wing and nasal pterygoid process).The relationship between this initial morphology and adult morphology is difficult to determine because of extensive membranous ossification along the cartilaginous elements.We examined the sagittal sections of 25 embryos and fetuses aged 6-34 weeks,and compared them with the horizontal and frontal sections of the other 25 late fetuses(217-340 mm).At 7-8 weeks,the optic nerve was sandwiched between bars of the orbitosphenoid.The superior rectus originates from a bar different from the other three recti.
文摘Cartilaginous fabella appears to be embedded in the plantaris origin(PL)that fuses with the gastrocnemius lateral head(GL)in midterm fetuses.Histological sections of unilateral knee joints of 15 late-stage fetuses,we reexamined the topographical anatomy of fabella or its analogue(a tight fibrous mass)with origins of the GL and PL.Irrespective of whether the cartilaginous fabella is present(6/15)or absent,these muscle origins were composed of three parts(PLl,PL2 and PL3;GLl,GL2 and GL3).Fabella or its analogues embedded in a thicker common tendon origin of GL and PL.PL1 was similar to the adult PL,and originated from the femoral condyle immediately above the common tendon.
