Hemiparesis

Hemiparesis is unilateral weakness resulting from lesions of the corticospinal tract or motor cortex. Etiologies include stroke, traumatic brain injury, tumors, or demyelinating disease. Pathophysiology involves disruption of descending motor pathways. Diagnosis is clinical, supported by neuroimaging and electrophysiologic studies. Management is etiology-specific and includes rehabilitation, physical therapy, and spasticity management; prognosis depends on lesion severity and intervention timing.