title: Histological and ultrastructural studies of the muscle spindles in the human fetal masticatory muscles.
mesh_terms: D005314:Embryonic and Fetal Development; D005152:Facial Muscles / Q000166:cytology / Q000196:embryology* / Q000648:ultrastructure; D005333:Fetus; D006801:Humans; D008409:Mastication; D008465:Mechanoreceptors / Q000196:embryology