Delayed dyskinesia is divided into the following types according to the site of dyskinesia ① abnormal eye muscle movement: blinking, blepharospasm, etc.; ② abnormal facial muscle movement: facial muscle twitching, jerking and sad face, etc.; ③ abnormal mouth muscle movement: pouting, smacking, chewing, suction and lateral jaw movement, etc.; ④ abnormal tongue muscle movement: tongue extension, tongue contraction, wriggling and lip licking, etc.; ⑤ abnormal pharyngeal muscle movement: abnormal palate movement affecting pronunciation and (6) abnormal neck movement: slanting neck, backward neck, etc.; (7) abnormal trunk movement: uncoordinated trunk movement, odd posture, such as shrugging shoulders and retracting back, corkscrew, twisting spasm, diaphragm spasm producing grunting and breathing difficulties, sometimes the whole body swaying from side to side, repeated trunk flexion and extension, back and forth twisting, called body shaking sign; (8) abnormal limb movement: continuous flexion and extension of the distal limbs, called playing piano fingers (toes) sign. The proximal end is rarely involved, and a few of them show dance-like finger paddling movements, throwing movements, hand and foot squirming-like movements, repeatedly raising both hands or jumping on both legs. What are the examination methods of delayed dyskinesia? 1.Computerized tomography CT examination CT is a fully functional condition detection instrument, it is the abbreviation of electronic computer X-ray tomography technology. CT examination is based on the different absorption and transmission rates of different tissues of the human body to X-rays, the application of extremely sensitive instruments to measure the human body, and then the measurement of the data obtained into the electronic computer, electronic computer processing of data, you can After processing the data, the electronic computer can take a cross-sectional or three-dimensional image of the examined part of the human body and discover small lesions in any part of the body. 2.Nuclear magnetic resonance imaging Nuclear magnetic resonance imaging, also known as magnetic resonance imaging, is the use of nuclear magnetic resonance principle, through the application of gradient magnetic field detection of the emitted electromagnetic waves, according to which the internal structure of the object can be drawn into the image. 3, SPECT imaging SPECT is an instrument that realizes in vivo functional and metabolic imaging with the help of single-photon nuclide labeled drugs, which is one of the basic instruments of nuclear medicine imaging and has been equipped to most municipal hospitals, playing an important role in the imaging diagnosis of diseases. It is characterized by its ability to reflect information on blood perfusion and substance metabolism in tissues and organs, and the nuclide used has a long half-life and is easy to prepare and transport, so the cost of use is low and easy to promote. However, due to the limitation of resolution, the anatomical structures cannot be clearly displayed, causing difficulties in localization of lesions. At present, SPECT/CT fusion models have been produced, which can precisely fuse the functional images of SPECT with those of diagnostic CT, making up for the deficiency of SPECT in anatomical localization and resolution, and have great application prospects.