glabellar

Glabellar is an anatomical adjective relating to the glabella, the smooth, midline area of the forehead between the eyebrows and above the nose.

Anatomically, the glabella lies on the frontal bone, projecting between the supraorbital ridges. The glabellar region includes the skin and soft tissues overlying the underlying muscles, notably the procerus and the corrugator supercilii, which mediate facial expressions such as frowning.

Clinically, glabellar lines refer to the vertical or horizontal creases that form between the eyebrows with age and repeated contraction of the procerus and corrugator muscles. In cosmetic medicine these lines are commonly treated with neuromodulators that relax the muscles; fillers may be used for deeper lines. Glabellar aesthetics are often considered in combination with other facial rejuvenation goals.

In neurology, the glabellar reflex, or glabellar sign, is elicited by tapping the glabella. Normal individuals typically show rapid habituation after several taps, whereas a persistent response can be seen in certain conditions affecting frontal lobe function, making the sign a historic but occasionally referenced clinical test.

The term glabellar derives from Latin glabellus meaning smooth. In practice, glabellar features are used in aging and cosmetic assessment, as well as in neurological examination through the glabellar reflex.