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Control facial muscle voluntary

Facial expressions reflect decisions about the perceived meaning of social stimuli and the expected socio-emotional outcome of responding or not with a reciprocating expression. The decision to produce a facial expression emerges from the joint activity of a network of structures that include the amygdala and multiple, interconnected cortical and subcortical motor areas. Reciprocal transformations between these sensory and motor signals give rise to distinct brain states that promote, or impede the production of facial expressions. The muscles of the upper and lower face are controlled by anatomically distinct motor areas.
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The amygdalo-motor pathways and the control of facial expressions

Control facial muscle voluntary
Control facial muscle voluntary
Control facial muscle voluntary
Control facial muscle voluntary
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Facial expression analysis - Scholarpedia

Whereas the somatotopy of finger movements has been extensively studied with neuroimaging, the neural foundations of facial movements remain elusive. The main goal of the study was to investigate the detailed somatotopy of the facial primary motor area facial M1. Our facial movement task induced generally high activation in brain motor areas e. BOLD activations revealed overlapping representations for the four facial movements.
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Neuronal correlates of voluntary facial movements

The facial muscles are a group of striated skeletal muscles supplied by the facial nerve cranial nerve VII that, among other things, control facial expression. These muscles are also called mimetic muscles. The facial muscles are just under the skin subcutaneous muscles that control facial expression. They generally originate from the surface of the skull bone rarely the fascia , and insert on the skin of the face.
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We investigated to verify whether impairments in facial movements happen for spontaneous as well as for voluntary expressions by quantitatively comparing muscle activations using surface electromyography. Dynamic facial expressions of Neutral, Anger, Joy, and Sad were presented during recordings in corrugator and zygomatic areas. In the spontaneous condition, participants were instructed to simply watch clips, whereas in the voluntary condition they were instructed to actively mimic the stimuli. We found that PD patients showed decreased mimicry in both spontaneous and voluntary conditions compared to a matched control group, although movement patterns in each emotion were similar in the two groups. Moreover, whereas the decrease in mimicry correlated with the decrease not in a health-related quality of life index PDQ , it did so in a more subjective measurement of general quality of life index SWB.
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