μm	micrometers
μV	microvolt
CFT	central foveal thickness
Clench	ultrasound muscles examination in the maximum voluntary clenching
CPS	cervical proprioceptive system
DA	anterior belly of the digastric muscle
Dsph	Diopters
IOP	intraocular pressure
L	Left site
mm	millimeters
MM	the superficial part of the masseter muscle
mmHg	millimeter of mercury
p	Pearson test
R	Right site
RDC/TMD	Research Diagnostic Criteria for Temporomandibular Disorders
Rest	ultrasound muscles examination in the relaxed mandible position with slight contact between opposing teeth
s	Spearman rho test
SCM	middle part of the sternocleidomastoid muscle belly
sEMG	surface electromyography
SMAS	superficial musculoaponeurotic system
TA	part of the temporalis muscle
TMD	temporomandibular disorders
VOR	vestibulo-ocular reflex