Arteries supplying the skin and muscles over the glabella gives branches to glabella also.
The glabella is the bony landmark present in the outer table of the frontal bone in the middle of the superciliary arches the glabella receives blood supply from the diploic veins present between the outer and inner table of the frontal bone.
In contrast to other facial wrinkles, which are secondary to deterioration of the cutaneous scaffolding of the skin, glabellar rhytids are dynamic yet functional. These hyper functional lines are implicated in the multifarious facial expressions such as fatigue, quizzical, and mistakenly at times, anger. There are five known types of patterns identified in European and American races, while researchers have identified six patterns in the Asian race. Glabellar complex muscle produces different patterns of wrinkles and lines on the forehead by contraction and relaxations. The belief is that repeated pulling of the skin by these hyperdynamic muscles contributes to the formation of rhytids, described as fine lines to deep furrows. Procerus, corrugator supercilii, depressor supercilii, orbicularis oculi, and frontalis fibers combinedly make glabellar complex. Transverse head of corrugator supercilii fuses with orbicularis oculi fibers. It is also an important bony landmark for sexual dimorphism, developmental and comparative anatomy, and gives attachment to fibers of the orbital part of orbicularis oculi and procerus muscle. The glabella is in near relation to frontal sinuses and nasion. Superciliary arches are more prominent in males than females. The glabella is a bony point present on the frontal bone between two superciliary arches Superciliary arches are the prominent bony part just above the medial one-third of the supraorbital margins.
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