The core of the stuttering block.
D001007:Anxiety; D006801:Humans; D007830:Larynx / Q000503:physiopathology*; D009119:Muscle Contraction; D009132:Muscles / Q000503:physiopathology*; D011312:Pressure; D012018:Reflex; D012054:Reinforcement, Psychology; D012119:Respiration; D013315:Stress, Psychological; D013342:Stuttering / Q000209:etiology / Q000503:physiopathology*