Active 10 Herz rTMS with intensity of 120% of the resting motor threshold recorded from the right first dorsal interosseus and the right abductor hallucis will be administered over the left DLPFC and over the left DMPFC respectively. Therapy will include 20 sessions (one session in each of 20 consecutive working days - four weeks in total). In every session ca 1500 magnetic pulses over the left DLPFC and ca 1500 over the left DMPFC will be elicited.

Active 10 Herz rTMS with intensity of 120% of the resting motor threshold recorded from the right first dorsal interosseus will be administered over the left DLPFC. Therapy will include 20 sessions (one session in each of 20 consecutive working days - four weeks in total). In every session 3000 magnetic pulses over the left DLPFC will be elicited.

Sham 10 Herz rTMS will be administered over the left DLPFC. Therapy will include 20 sessions (one session in each of 20 consecutive working days - four weeks in total). In every session 3000 magnetic pulses over the left DLPFC or ca 1500 magnetic pulses over the left DLPFC and ca 1500 over the left DMPFC will be elicited. (rTMS protocol will be chosen randomly before the first session).

Active rTMS over the left DLPFC and over the left DMPFC to induce the long term potentiation of stimulated areas.

Inventory consisting of 21 items measuring cognitive, affective, somatic, and vegetative symptoms of depression. Each item is scored from 0 to 3, with a higher score denoting more severe depression. Items are related to the criteria from the Diagnostic and Statistical Manual of Mental Disorders-IV. The minimum value of the total score is 0 and the maximum is 63 with higher scores meaning worse outcome. Change from the baseline to the measurement done after finishing intervention, to the measurement done two weeks after finishing intervention to the measurement done four weeks after finishing intervention.

A measure of verbal short term and working memory. Participant is asked to repeat the random series of numbers, which become longer along with every correctly repeated one. Test is finished after participant failed to respond correctly on three occasions. The number of correctly repeated series determines the final score, which is an integer representing the length of the largest passed sequence. The scores range from 3 to 9 with higher scores denoting better outcome. Change from the baseline to the measurement done after finishing intervention, to the measurement done two weeks after finishing intervention to the measurement done four weeks after finishing intervention.

A test to identify cognitive impairment in dementia. In the language part, participant is asked to complete a set commands such as "place the paper on top of the pencil"; to write grammatically-complete sentences; to repeat several words and proverbs; to name the objects shown in drawings, and answer questions and to read several mispronounced words. The number of correctly completed tasks is scored. The minimum value of the total score is 0 and the maximum (of the language part) is 26 with higher scores meaning better outcome. Change from the baseline to the measurement done after finishing intervention, to the measurement done two weeks after finishing intervention to the measurement done four weeks after finishing intervention.

A 17-item scale that measures desire, motivation, effort and consummatory pleasure across hedonic domains. In each item, participant chooses one of four statements describing his attitude towards a given activity. The minimum value of the total score is 0 and the maximum is 68 with higher scores meaning better outcome. Change from the baseline to the measurement done after finishing intervention, to the measurement done two weeks after finishing intervention to the measurement done four weeks after finishing intervention.