| The condition arises when the paired frontalis muscles lose tone in response to gravity and downward descent of the brow ensues. |
| For instance Plotheia frontalis, a Noctuid which often abounds in Ceylon, shows an equally bewildering wealth of forms. |
| The temporal nerve provides motor innervation to the frontalis, corrugator, and lateral orbicularis oculi muscles. |
| Some months previously to his coming under observation he developed a convulsive tic limited to the frontalis. |
| Dorsal surface sooty black as in stelleri, but with blue on forehead nearly as extended as in frontalis. |
| The taxonomic validity of Pseudoficimia pulcherrima remains doubtful, for only minor characters distinguish it from P. frontalis. |
