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Abnormal posturing is an involuntary flexion or extension of the arms and legs, indicating severe brain injury. It occurs when one set of muscles becomes incapacitated while the opposing set is not, and an external stimulus such as pain causes the working set of muscles to contract. [1] The posturing may also occur without a stimulus.
Extension is the opposite of flexion, a straightening movement that increases the angle between body parts. [12] For example, when standing up, the knees are extended. When a joint can move forward and backward, such as the neck and trunk, extension is movement in the posterior direction. [ 10 ]
The normal knee flexion is between 130 and 150 degrees. Any pain, abnormal movement, or crepitus of the patella should be noted. If there is pain or crepitus during active extension of the knee, while the patella is being compressed against the patellofemoral groove, patellofemoral pain syndrome or chondromalacia patellae should be suspected ...
Involuntary extension of the "normal" leg occurs when flexing the contralateral leg against resistance. To perform the test, the examiner should hold one hand under the heel of the "normal" limb and ask the patient to flex the contralateral hip against resistance (while the patient is supine), asking the patient to keep the weak leg straight while raising it.
hip and knee fully flexed, extension of knee elicits pain and/or opisthotonus Kocher's sign: Emil Theodor Kocher: ophthalmology, endocrinology: Hyperthyroidism, Basedow's disease, In fixation on a fast upwards movement there occurs a convulsive retraction of the eyelid Koebner's phenomenon: Heinrich Koebner: dermatology: various conditions ...
It manifests in abnormal and stereotypical patterns across multiple joints called obligatory synergies. [1] They are described as either a flexion synergy or an extension synergy and affect both the upper and lower extremity (see below). [1] When these patterns occur in a patient, he or she is unable to move a limb segment in isolation of the ...
Flexion and extension describe the basic ways your body moves at its joints. Here's what that means for your workouts and training.
Genu recurvatum is a deformity in the knee joint, so that the knee bends backwards. In this deformity, excessive extension occurs in the tibiofemoral joint. Genu recurvatum is also called knee hyperextension and back knee. This deformity is more common in women [citation needed] and people with familial ligamentous laxity. [2]