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In this study EEG patterns ofsensorimotor rhythm were examined in 10 healthy subjects while perform- ing motor imagery of upper arm and hand movements. Participants received visual feedback through so called brain-computer interface (BCI) used for detection of user-specific spatio-temporal.EEG patterns associated with performed mental tasks. During the course study,.all of the subjects were able to modulate their sensorimotor EEG by performing motor imagery of shoulder and fingers movements. Patterns during imagery of shoulder movements were found to have more pronounced contralateral localization, than those during hand movements' imagery. That led to significantly better classification accuracies of the most lateralized patterns when discriminating between left and right hand (72 and 58% corresponding to shoulder and hand motor imagery). Value of difference of patterns' lateralization indexes had shown strong correlation with classification accuracy, suggests it could be used as a good ref- erence mark for.choosing optimal motor imagery tasks for BCI application.

Objective: to explore the sensory disturbances in the arm on the side of operation compared to the opposite upper extremity and evaluate quality of life in patients with breast cancer with postmastectomy syndrome., Material and Methods: Authors examined 110 women during one year including 64 (58.2%) with intact intercostal and shoulder nerves (group 1) and 46 (41.8%) with the nerves removed due to the progression of cancer or anatomical characteristics (group 2). We studied sensory disturbances and assessed quality of life with SF-36 questionnaire., Results and Conclusion: In group 1, there were less women with hyperesthesia, and quality of life level was higher compared to group 2. In group 2, the signs of hyperesthesia were more marked that may be related with the damage and/or compression of these nerves during the axillary lymphadenectomy. Preservation of intercostal and shoulder nerves during the axillary lymphadenectomy in patients with breast cancer can reduce sensory disturbances and improve quality of life of the patients.

In the course of preparing muscular and neurovascular specimen of human right arm a combination of several rare anatomic variants was discovered which, to the authors opinion, are worth attention. 1. Formation of the median nerve at the border between middle and inferior thirds of brachium. 2. Variant of n. musculocutaneus origination from the lateral fascicle of plexus brachialis by several branches. 3. Variant of n. antebrachii cutaneous lateralis origination from the lateral fascicle by two branches. 4. Radial artery branching from humeral artery at the level of middle third of the brachium. 5. Three heads were discovered in m. biceps brachii. The variants described are interesting from scientific and clinical interest: they contribute to general conception of human anatomy and clinical manifestations of injuries of brachial nerves and arteries.