The<unk>  signs are seen in conditions where motor areas in the brain and/or spinal cord are damaged or fail to develop normally. These include spinal cord injury, cerebral palsy, multiple sclerosis and acquired brain injury including stroke. The impact of impairment of muscles for an individual is problems with movement, and posture, which often affects their function.
Upper motor neuron syndrome
Motor neuron disease
Distal hereditary motor neuronopathies
Central cord syndrome
Vascular myelopathy
Occipital horn syndrome
Posterior cord syndrome
Tethered spinal cord syndrome