It also gave readouts for the corrugator supercilii
, the 'frowning muscle' that furrows the brow and is frozen by Botox.
We chose to manipulate Zygomaticus major and Corrugator supercilii activity by asking participants to smile or frown.
Pretending to adjust the EMG apparatus, the experimenter instructed participants to (a) relax the facial muscles by adopting a neutral facial expression, (b) contract the Zygomaticus major by smiling, and (c) contract the Corrugator supercilii by frowning.
Neuromuscular blockade at the larynx, the diaphragm and the corrugator supercilii muscle: a review.
Table 3 Increasing sensitivity of muscles to neuromuscular blockade Diaphragm Corrugator supercilii Laryngeal adductors Orbicularis occuli Abdominal rectus Abductor digiti minimi Adductor pollicis = first dorsal Interosseous Genioglossus muscles Masseter Pharyngeal Note: "Increasing" is from top to bottom.
infraorbital (zygomaticus major and minor, the levator labii superioris alaeque nasi, the superior part of the orbicularis oris, and possibly the compressor naris, the depressor septi nasi, the orbicularis oculi, the frontalis, the corrugator supercilii, and the procerus)
3) During the ninth week (50 to 60 mm), the auricularis anterior, the corrugator supercilii, the occipital and mandibular platysma, and the levator labii superioris appear.
The researchers observed that the patients twitched their smiling-specific zygomaticus major muscle when presented with happy pictures, and the frowning-specific corrugator supercilii
muscle when presented with fearful pictures.
Neuromuscular transmission was monitored at the adductor pollicis and corrugator supercilii muscles using acceleromyography (AMG) (TOF-Watch SX, Organon Teknika, Finland).
Overall, the time course of recovery and the finding of faster recovery of corrugator supercilii muscles in response to a standard dosage of mivacurium in our patient are within the range of published data from patients without myopathies (3).
It involves the involuntary activity of the orbicularis oculi, procerus, and corrugator supercilii
funny," "frustrating") on a monitor, while the activity of their zygomatic major (the muscle responsible for smiles) and corrugator supercilii
(which causes frowns) muscles were measured.