<unk>  <unk>  is a form of neuromodulation that uses constant, low<unk><unk>  delivered via electrodes on the head. It was originally developed to help patients with brain injuries or neuropsychiatric conditions such as major depressive disorder. It can be contrasted with cranial electrotherapy stimulation, which generally uses alternating<unk>  the same way, as well as transcranial magnetic stimulation. Research shows increasing evidence for<unk>  as a treatment for depression. There is mixed evidence about whether<unk>  is useful for cognitive enhancement in healthy people. There is no strong evidence that<unk>  is useful for memory deficits in Parkinson's disease and Alzheimer's disease, non-neuropathic pain, nor for improving arm or leg functioning and muscle strength in people recovering from a stroke. There is emerging supportive evidence for<unk>  in the management of schizophrenia - especially for negative symptoms.
Transcranial direct-current stimulation
Transcranial magnetic stimulation
Non-invasive cerebellar stimulation
Transcranial random noise stimulation
Thalamic stimulator
Electrical brain stimulation
Electric acoustic stimulation
Cranial electrotherapy stimulation