**Abstract**

Transcranial magnetic stimulation is an non-invasive method of neuromodulation. It uses magnetic field to induce generation of current for cortical stimulation. It can modulate the altered equilibrium in cortical excitability by magnetic field. Though it is famous for its application in treating psychiatric diseases, it has many other applications. Since its introduction in 1985, it has been used to check the integrity of motor pathway. With more understanding of the technique, it has been started to be used to check the integrity of other brain connections like speech and vision. Due to its ability of neuromodulation, it has also been used in cortical mapping in neurosurgery and neurological function rehabilitation.

**Keywords:** transcranial magnetic stimulation, TMS, neuromodulation, neurorehabilitation, cortical mapping
