The tonic vibration reflex of the musculus quadriceps femoris can be used to measure the change in tonus of the postural type.
D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009119:Muscle Contraction; D009470:Muscle Spindles / Q000502:physiology; D009129:Muscle Tonus; D009132:Muscles / Q000294:innervation*; D009334:Neck Muscles / Q000294:innervation*; D011187:Posture; D012018:Reflex / Q000502:physiology*; D014732:Vibration