It is easy to confuse muscle tone with muscle strength, often mistaking low muscle strength for low muscle tone. Myotonia is the resistance encountered when a muscle is passively stretched or pulled, or muscle tone is the resistance felt when a limb is passively moved or a muscle is pressed. Normal muscle tone is the basis for the body to maintain various postures and movements, and is generally divided into resting muscle tone, postural muscle tone and motor muscle tone. Only the organic combination of these three muscle tone, coordinated with each other, will maintain and ensure the normal posture and movement of people. Abnormal muscle tone can lead to abnormal posture and movement, and the generation and maintenance of muscle tone is a complex reflex activity. When muscle tone is high, the trunk and limbs are stiff, and joint mobility is small; when muscle tone is low, the body is soft, and there is a feeling of holding, and joint mobility is too large; and when muscle tone is shaky, it can cause people to have involuntary movements. Muscle strength is the ability of the muscles to contract or tense, is the human organism or a part of the organism muscle work (contraction or stretching) to overcome
The ability to overcome internal and external resistance. The role of muscle force: skeletal muscles are divided into extensor, flexor, adductor, adductor, pre-scholar and post-scholar muscles, which perform different functions under motor innervation. Any one action needs a group of muscle groups to complete together, that is, rely on the prime movers, antagonist muscles, fixed muscles, synergist muscles these four muscle groups in the movement of coordinated action, in order to have a normal postural movement pattern. Muscle strength can be simply understood as our ability to resist gravity by lifting heavy objects, picking things, grasping, etc. Muscle strength can be divided into 0-5 levels by the freehand examination method, and 5 levels for normal children. In short, the performance of low muscle tone are: the hand can circle the neck like a scarf, the body can be folded in pairs, frog-like position when lying on the back, the foot can touch the ear, the head drops back, there may be exotropia flatfoot, etc.; the performance of high muscle tone are: head back, elbow flexion, forearm rotation forward, thumb inward, drooping wrist, pointed foot, scissor step, knee flexion, hip flexion, etc.; the performance of low muscle strength are: upper limb grasping, lifting, support no force, lower limb can not Low muscle strength includes: upper limb grasping, lifting and support, lower limb inability to jump, leg lifting, weight holding, waist and abdomen weakness, and little spontaneous movement. Children with any type of cerebral palsy may have low muscle tone in infancy, and then they will gradually show the characteristics of this type, and most of them will turn into involuntary movement cerebral palsy, while children with soft palsy and dyscalculia will always have low muscle tone. There is also a general problem of low muscle tone in children with any type of cerebral palsy.