[{"n": "Abnormal posturing", "u": "/e/symptoms-and-signs-nervous-system/abnormal-posturing/", "s": "Involuntary limb posturing indicating severe brain injury."}, {"n": "Acalculia", "u": "/e/symptoms-and-signs-nervous-system/acalculia/", "s": "Acquired difficulty with arithmetic after brain injury."}, {"n": "Agitation (medical)", "u": "/e/symptoms-and-signs-nervous-system/agitation-medical/", "s": "A state of heightened activity that may escalate to aggression or violence."}, {"n": "Agnosia", "u": "/e/symptoms-and-signs-nervous-system/agnosia/", "s": "Agnosia is the inability to recognize sensory stimuli despite intact senses."}, {"n": "Akathisia", "u": "/e/symptoms-and-signs-nervous-system/akathisia/", "s": "A movement disorder of inner restlessness and inability to sit still."}, {"n": "Akinetic mutism", "u": "/e/symptoms-and-signs-nervous-system/akinetic-mutism/", "s": "A disorder of diminished motivation with akinesia and mutism."}, {"n": "Allochiria", "u": "/e/symptoms-and-signs-nervous-system/allochiria/", "s": "A disorder mislocating stimuli to the opposite side of the body."}, {"n": "Asterixis", "u": "/e/symptoms-and-signs-nervous-system/asterixis/", "s": "A flapping-like movement disorder from metabolic or structural brain dysfunction."}, {"n": "Athetosis", "u": "/e/symptoms-and-signs-nervous-system/athetosis/", "s": "Slow, involuntary writhing movements due to basal ganglia damage."}, {"n": "Brudziński's sign", "u": "/e/symptoms-and-signs-nervous-system/brudzi-ski-s-sign/", "s": "Three clinical signs of meningeal irritation."}, {"n": "Convulsion", "u": "/e/symptoms-and-signs-nervous-system/convulsion/", "s": "Uncontrolled muscle contractions from abnormal brain activity."}, {"n": "Cyanopsia", "u": "/e/symptoms-and-signs-nervous-system/cyanopsia/", "s": "A temporary blue tint to vision, often after cataract surgery or medication use."}, {"n": "Diadochokinesia", "u": "/e/symptoms-and-signs-nervous-system/diadochokinesia/", "s": "Ability to perform rapid alternating antagonistic movements; loss indicates cerebellar disease."}, {"n": "Dysarthria", "u": "/e/symptoms-and-signs-nervous-system/dysarthria/", "s": "Neurological motor speech disorder impairing articulation."}, {"n": "Dyschronometria", "u": "/e/symptoms-and-signs-nervous-system/dyschronometria/", "s": "A cerebellar disorder causing distorted time perception."}, {"n": "Dysdiadochokinesia", "u": "/e/symptoms-and-signs-nervous-system/dysdiadochokinesia/", "s": "Impaired ability to perform rapid, alternating movements."}, {"n": "Dyskinesia", "u": "/e/symptoms-and-signs-nervous-system/dyskinesia/", "s": "Involuntary muscle movements from tremor to uncontrollable limb motion."}, {"n": "Dysmetria", "u": "/e/symptoms-and-signs-nervous-system/dysmetria/", "s": "A coordination disorder marked by overshooting or undershooting movements."}, {"n": "Dysosmia", "u": "/e/symptoms-and-signs-nervous-system/dysosmia/", "s": "Qualitative smell disorder including parosmia and phantosmia."}, {"n": "Fasciculation", "u": "/e/symptoms-and-signs-nervous-system/fasciculation/", "s": "Spontaneous muscle twitches, often benign but sometimes indicating motor neuron disease."}, {"n": "Fibrillation", "u": "/e/symptoms-and-signs-nervous-system/fibrillation/", "s": "Rapid, irregular contraction of muscle fibers, notably cardiac."}, {"n": "Frontal release sign", "u": "/e/symptoms-and-signs-nervous-system/frontal-release-sign/", "s": "Primitive reflexes released by frontal lobe dysfunction."}]