The document discusses various physical therapy modalities, including electroconvulsive therapy (ECT), light therapy, and repetitive transcranial magnetic stimulation (rTMS). It provides details on the procedures, indications, contraindications, mechanisms of action, and the nurse's role in administering ECT and light therapy. ECT involves delivering a controlled electric shock to induce a seizure for treating various psychiatric conditions. Light therapy involves light box exposure for conditions like seasonal affective disorder. rTMS uses magnetic pulses to increase neurotransmitter release for potential treatment of depression.