Development of the muscle spindles in the human fetal oblique muscles of the eyeball.
The development of muscle spindles in human oblique eye muscles was investigated in 22 fetuses aged 12 to 24 weeks. The muscle spindles appear at 12th week as 1-2 intrafusal fibers surrounded by capsule. With advancement of the development the number of intrafusal myofibers increases. In 14th week the capsule is composed of 2 layers and in 17th week the external capsule appears.
Korzeniowska-Kromer
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Department of Anatomy, Academy of Medicine, Poznań.
D005314:Embryonic and Fetal Development / Q000502:physiology; D005123:Eye / Q000196:embryology*; D006801:Humans; D066298:In Vitro Techniques; D009470:Muscle Spindles / Q000196:embryology*; D009132:Muscles / Q000196:embryology*