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Facial motor system: voluntary and emotional control

Ginatempo, Francesca (2019) Facial motor system: voluntary and emotional control. Doctoral Thesis.

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Abstract

Face expressions have a crucial role in human nonverbal behaviour and can be either voluntarily or emotionally controlled. The variety of functions of facial muscles, is reflected in their anatomical and histological characteristics. Face muscles present a peculiar coordination, in fact also during voluntary movements, facial muscles’ groups are always recruited together to produce a facial posture, but how and at which level they are coordinated and controlled by the emotional system is still unknown. For long time was impossible to study the motor control of facial muscle in humans. Only recently several studies have demonstrated that it is possible to probe it using transcranial magnetic stimulation (TMS).
This work thesis attempted to investigate: 1) the interhemispheric connections between facial motor cortices (fM1);2) the cerebellar-fM1 connectivity; and 3) the influence of emotional stimuli over fM1 and pre-motor cortices, using TMS protocols.
Results provided the first demonstration that : 1) the corpus callosum plays a minor role in the coordination of bilateral face movements; 2) A clear cerebellar-fM1 connectivity operates in the facial motor system; 3) fM1 is directly connected with the emotional system and specifically modulated by stimuli with positive connotation.

Item Type:Doctoral Thesis
ID Code:11977
Contributors:Deriu, Franca
Publisher:Universita' degli studi di Sassari
Uncontrolled Keywords:Motor control, face expression, facial muscle, TMS, cerebellum
Subjects:Area 05 - Scienze biologiche > BIO/09 Fisiologia
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Scienze Biomediche
Cicli, scuole e corsi:Ciclo 31 > Scienze biomediche > Neuroscienze
Deposited On:19 Apr 2019 13:30

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