The glabella is the smooth, slightly convex area of the frontal bone between the superciliary arches (brow ridges) above the root of the nose and between the two supraorbital ridges. It represents the anteriormost midline point of the frontal bone at brow level. The procerus and corrugator supercilii muscles insert in this region.
The glabella is an important craniofacial landmark in rhinoplasty, brow surgery, and facial proportion analysis where the face is divided into aesthetic thirds with the glabella as a key reference. Glabellar frown lines from corrugator and procerus muscle activity are treated with botulinum toxin injection in the glabellar complex. In forehead and brow surgery, glabellar rhytids guide endoscopic approaches to the corrugator muscles. Fractures at this level indicate frontal sinus involvement.
Corrugator supercilii and procerus muscle contraction produces vertical and horizontal glabellar frown lines; botulinum toxin injected into these muscles at and around the glabella relaxes the overactive muscular complex, with precise injection technique required to avoid brow ptosis or lagophthalmos from orbicularis spread.
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