Anatomic relationships of the orbital muscle of Müller in human fetuses.
A study was carried out in twenty human fetuses on the relationships of the orbital muscle of Müller. This muscle forms a lamina of smooth muscle fibres that cover the inferior orbital fissure. The latter is very wide during the fetal period because ossification of the bones that delimit this region is still incomplete. Some fibres of the orbital muscle extend along the superior orbital fissure under the inferior ophthalmic vein and the lower wall or floor of the cavernous sinus. This association suggests a possible influence on autonomically mediated vascular dynamics.
Rodríguez-Vázquez
J F
JF
Departamento de Ciencias Morfológicas II, Facultad de Medicina, Universidad Complutense, Madrid, Spain.
Mérida-Velasco
J R
JR
Arráez-Aybar
L A
LA
Jiménez-Collado
J
J
D000273:Adipose Tissue / Q000196:embryology; D002426:Cavernous Sinus / Q000196:embryology; D003238:Connective Tissue / Q000196:embryology; D005152:Facial Muscles / Q000098:blood supply / Q000196:embryology* / Q000294:innervation; D005333:Fetus; D005865:Gestational Age; D006801:Humans; D008437:Maxilla / Q000196:embryology; D008438:Maxillary Artery / Q000196:embryology; D008442:Maxillary Nerve / Q000196:embryology; D018485:Muscle Fibers, Skeletal / Q000648:ultrastructure; D009130:Muscle, Smooth / Q000098:blood supply / Q000196:embryology / Q000294:innervation; D009915:Orbit / Q000098:blood supply / Q000196:embryology* / Q000294:innervation; D013100:Sphenoid Bone / Q000196:embryology; D014680:Veins / Q000196:embryology; D015050:Zygoma / Q000196:embryology