A total dose of four units of botulinum toxin A was injected into the right levator labii superior muscle, two units into the right levator anguli oris muscle, two units into the left depressor anguli oris
muscle, and two units into the right inferior orbicularis oris muscle.
DISCUSSION: Asymmetric crying facies (ACF), also called Cayler cardiofacial syndrome, partial unilateral facial paresis and hypoplasia of depressor anguli oris muscle, (3) is a minor congenital anomaly caused by agenesis or hypoplasia of the depressor anguli oris muscle, one of the muscles that control the movements of the lower lip.
When the hypoplasia of the depressor anguli oris muscle is associated with congenital cardiac defects, the term 'Cayler cardiofacial syndrome' is used.
Then in quick succession, we add the smiling muscles, levator anguli oris (attaching just below the eye to lift the corners of the mouth) and the sadness muscles, levator labii superioris (Fig 4) (which deepen the nasiolabial fold when crying or being serious) and the depressor anguli oris
, the disgust muscle (a triangular muscle attaching to the lower jaw at the side of the mouth) which lowers the corners of the mouth.
Specifically, the 'grief' muscles, the corrugator supercilli - located around the eyebrow - and depressor anguli oris
- between the chin and corner of the lips - were more often contracted in the faces of 'genuine' rather than 'deceptive pleaders,'" University of British Columbia researchers found.
the mandibular lamina (the depressor labii inferioris, the mentalis, the risorius, the depressor anguli oris, the inferior part of the orbicularis oris, and perhaps the buccinator and the levator anguli otis)
Between 24 and 26 mm, the zygomaticus major, the depressor anguli oris, and the buccinator appear.
Although we performed a labiomandibular triangle to remove redundant skin, there have been reports that damage of innervation to the depressor anguli oris
may occur, and so attention must be applied (14).