somatosensory cortex somatosensory cortex somatosensory cortex somatosensory cortex somatosensory cortex somatosensory cortex somatosensory cortex primary sensory cortex czuciowy English English somatosensory cortex somatosensory cortex somatosensory cortex hand’s sensory cortex somatosensory cortex somatosensory cortex primary sensory cortex sensory cortex