The results of this dissertation contribute to the existing literature on vibrotactile WM by suggesting that:

• A broad network of brain regions - much broader than known from previous studies in non-human primates - supports the performance of a vibrotactile delayed discrimination task. In particular, the PPC is involved in active maintenance and decision making.

• S1 does not contribute to the active maintenance of the vibrotactile memory trace. The level of activity in S1 depends on the efficiency with which subjects encode the vibrotactile stimulus.

• The physiological state of S1 in the pre-trial periods reflects task demands and influences performance.

• LTM representations, that give rise to the TOE, influence neural processing and performance in vibrotactile delayed discrimination.

Together, this dissertation supports the view that convergent evidence by complementary experiments in humans and monkeys, as well as the application of multiple methods, can help to elucidate the cerebral organization of cognitive functions in the primate brain.